/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/counter-fun.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-4b0ab11 [2022-03-01 17:53:07,052 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-01 17:53:07,054 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-01 17:53:07,121 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-01 17:53:07,173 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-01 17:53:07,174 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-01 17:53:07,175 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-01 17:53:07,180 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-03-01 17:53:07,204 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-01 17:53:07,205 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-01 17:53:07,205 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-01 17:53:07,205 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-01 17:53:07,206 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-01 17:53:07,206 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-01 17:53:07,206 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-01 17:53:07,207 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-01 17:53:07,207 INFO L138 SettingsManager]: * Use SBE=true [2022-03-01 17:53:07,207 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-01 17:53:07,208 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-01 17:53:07,208 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-01 17:53:07,208 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-01 17:53:07,208 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-01 17:53:07,208 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-01 17:53:07,208 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-01 17:53:07,208 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-01 17:53:07,208 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-01 17:53:07,209 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-01 17:53:07,209 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-01 17:53:07,209 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-01 17:53:07,209 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-01 17:53:07,209 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-01 17:53:07,209 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-01 17:53:07,209 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-01 17:53:07,209 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-01 17:53:07,210 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-01 17:53:07,210 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-01 17:53:07,210 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-01 17:53:07,210 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-01 17:53:07,210 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-01 17:53:07,210 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-01 17:53:07,210 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-01 17:53:07,211 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-01 17:53:07,400 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-01 17:53:07,415 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-01 17:53:07,417 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-01 17:53:07,418 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-01 17:53:07,420 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-01 17:53:07,421 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/counter-fun.wvr.bpl [2022-03-01 17:53:07,421 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/counter-fun.wvr.bpl' [2022-03-01 17:53:07,443 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-01 17:53:07,445 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-01 17:53:07,449 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-01 17:53:07,449 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-01 17:53:07,449 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-01 17:53:07,458 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:53:07" (1/1) ... [2022-03-01 17:53:07,464 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:53:07" (1/1) ... [2022-03-01 17:53:07,469 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-01 17:53:07,470 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-01 17:53:07,471 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-01 17:53:07,471 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-01 17:53:07,471 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-01 17:53:07,478 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:53:07" (1/1) ... [2022-03-01 17:53:07,478 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:53:07" (1/1) ... [2022-03-01 17:53:07,479 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:53:07" (1/1) ... [2022-03-01 17:53:07,479 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:53:07" (1/1) ... [2022-03-01 17:53:07,481 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:53:07" (1/1) ... [2022-03-01 17:53:07,483 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:53:07" (1/1) ... [2022-03-01 17:53:07,483 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:53:07" (1/1) ... [2022-03-01 17:53:07,484 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-01 17:53:07,485 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-01 17:53:07,485 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-01 17:53:07,485 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-01 17:53:07,486 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:53:07" (1/1) ... [2022-03-01 17:53:07,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-01 17:53:07,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:07,510 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-01 17:53:07,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-01 17:53:07,546 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-01 17:53:07,546 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-01 17:53:07,546 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-01 17:53:07,547 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-01 17:53:07,547 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-01 17:53:07,547 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-01 17:53:07,547 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-01 17:53:07,547 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-01 17:53:07,547 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-01 17:53:07,548 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-01 17:53:07,585 INFO L234 CfgBuilder]: Building ICFG [2022-03-01 17:53:07,586 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-01 17:53:07,652 INFO L275 CfgBuilder]: Performing block encoding [2022-03-01 17:53:07,666 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-01 17:53:07,666 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-01 17:53:07,668 INFO L202 PluginConnector]: Adding new model counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.03 05:53:07 BoogieIcfgContainer [2022-03-01 17:53:07,669 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-01 17:53:07,670 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-01 17:53:07,670 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-01 17:53:07,676 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-01 17:53:07,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:53:07" (1/2) ... [2022-03-01 17:53:07,677 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29b74861 and model type counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.03 05:53:07, skipping insertion in model container [2022-03-01 17:53:07,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.03 05:53:07" (2/2) ... [2022-03-01 17:53:07,678 INFO L111 eAbstractionObserver]: Analyzing ICFG counter-fun.wvr.bpl [2022-03-01 17:53:07,682 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-01 17:53:07,683 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-01 17:53:07,683 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-01 17:53:07,683 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-01 17:53:07,718 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-03-01 17:53:07,771 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-01 17:53:07,777 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-01 17:53:07,777 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-03-01 17:53:07,783 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 22 transitions, 60 flow [2022-03-01 17:53:07,801 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) [2022-03-01 17:53:07,803 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) [2022-03-01 17:53:07,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-01 17:53:07,808 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:07,809 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:07,809 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:53:07,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:07,814 INFO L85 PathProgramCache]: Analyzing trace with hash 487242803, now seen corresponding path program 1 times [2022-03-01 17:53:07,823 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:07,823 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345833437] [2022-03-01 17:53:07,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:07,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:07,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:07,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:07,936 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:07,936 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345833437] [2022-03-01 17:53:07,937 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345833437] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:53:07,937 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:53:07,937 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-01 17:53:07,938 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588384985] [2022-03-01 17:53:07,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:53:07,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-01 17:53:07,943 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:07,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-01 17:53:07,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-01 17:53:07,984 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) [2022-03-01 17:53:08,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:08,050 INFO L93 Difference]: Finished difference Result 57 states and 105 transitions. [2022-03-01 17:53:08,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-01 17:53:08,052 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 [2022-03-01 17:53:08,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:08,062 INFO L225 Difference]: With dead ends: 57 [2022-03-01 17:53:08,063 INFO L226 Difference]: Without dead ends: 50 [2022-03-01 17:53:08,064 INFO L932 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 [2022-03-01 17:53:08,067 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 2 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:08,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 20 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:53:08,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-01 17:53:08,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2022-03-01 17:53:08,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.85) internal successors, (74), 40 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:08,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 74 transitions. [2022-03-01 17:53:08,097 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 74 transitions. Word has length 14 [2022-03-01 17:53:08,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:08,097 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 74 transitions. [2022-03-01 17:53:08,098 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) [2022-03-01 17:53:08,098 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 74 transitions. [2022-03-01 17:53:08,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:53:08,099 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:08,099 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:08,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-01 17:53:08,099 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:53:08,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:08,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1536726091, now seen corresponding path program 1 times [2022-03-01 17:53:08,101 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:08,101 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660572163] [2022-03-01 17:53:08,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:08,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:08,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:08,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:08,259 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:08,259 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660572163] [2022-03-01 17:53:08,260 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660572163] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:08,260 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839191841] [2022-03-01 17:53:08,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:08,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:08,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:08,262 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:08,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-01 17:53:08,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:08,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-01 17:53:08,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:08,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:08,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:08,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:08,587 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839191841] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:08,588 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-01 17:53:08,588 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2022-03-01 17:53:08,589 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423407475] [2022-03-01 17:53:08,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:53:08,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 17:53:08,591 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:08,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 17:53:08,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:53:08,592 INFO L87 Difference]: Start difference. First operand 41 states and 74 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) [2022-03-01 17:53:08,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:08,733 INFO L93 Difference]: Finished difference Result 76 states and 130 transitions. [2022-03-01 17:53:08,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-01 17:53:08,733 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 [2022-03-01 17:53:08,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:08,743 INFO L225 Difference]: With dead ends: 76 [2022-03-01 17:53:08,743 INFO L226 Difference]: Without dead ends: 76 [2022-03-01 17:53:08,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:53:08,748 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 53 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:08,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 37 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:53:08,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-03-01 17:53:08,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 41. [2022-03-01 17:53:08,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.9) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:08,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 76 transitions. [2022-03-01 17:53:08,761 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 76 transitions. Word has length 16 [2022-03-01 17:53:08,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:08,761 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 76 transitions. [2022-03-01 17:53:08,762 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) [2022-03-01 17:53:08,762 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 76 transitions. [2022-03-01 17:53:08,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:53:08,762 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:08,762 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:08,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:08,963 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 [2022-03-01 17:53:08,964 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:53:08,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:08,964 INFO L85 PathProgramCache]: Analyzing trace with hash -833920783, now seen corresponding path program 1 times [2022-03-01 17:53:08,965 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:08,965 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425232323] [2022-03-01 17:53:08,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:08,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:08,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:09,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:09,016 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:09,016 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425232323] [2022-03-01 17:53:09,017 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425232323] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:53:09,017 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:53:09,017 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-01 17:53:09,017 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808147722] [2022-03-01 17:53:09,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:53:09,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 17:53:09,018 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:09,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 17:53:09,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-01 17:53:09,020 INFO L87 Difference]: Start difference. First operand 41 states and 76 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) [2022-03-01 17:53:09,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:09,115 INFO L93 Difference]: Finished difference Result 71 states and 125 transitions. [2022-03-01 17:53:09,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-01 17:53:09,116 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 [2022-03-01 17:53:09,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:09,119 INFO L225 Difference]: With dead ends: 71 [2022-03-01 17:53:09,119 INFO L226 Difference]: Without dead ends: 66 [2022-03-01 17:53:09,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:53:09,125 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 40 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:09,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 31 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:53:09,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-01 17:53:09,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 49. [2022-03-01 17:53:09,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 48 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) [2022-03-01 17:53:09,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 91 transitions. [2022-03-01 17:53:09,140 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 91 transitions. Word has length 16 [2022-03-01 17:53:09,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:09,140 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 91 transitions. [2022-03-01 17:53:09,141 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) [2022-03-01 17:53:09,142 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 91 transitions. [2022-03-01 17:53:09,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:53:09,144 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:09,144 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:09,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-01 17:53:09,145 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:53:09,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:09,148 INFO L85 PathProgramCache]: Analyzing trace with hash -2098848643, now seen corresponding path program 2 times [2022-03-01 17:53:09,148 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:09,149 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527576581] [2022-03-01 17:53:09,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:09,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:09,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:09,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:09,226 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:09,227 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527576581] [2022-03-01 17:53:09,227 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527576581] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:53:09,227 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:53:09,227 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-01 17:53:09,227 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269714106] [2022-03-01 17:53:09,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:53:09,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 17:53:09,228 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:09,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 17:53:09,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-01 17:53:09,229 INFO L87 Difference]: Start difference. First operand 49 states and 91 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) [2022-03-01 17:53:09,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:09,301 INFO L93 Difference]: Finished difference Result 51 states and 94 transitions. [2022-03-01 17:53:09,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-01 17:53:09,302 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 [2022-03-01 17:53:09,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:09,302 INFO L225 Difference]: With dead ends: 51 [2022-03-01 17:53:09,303 INFO L226 Difference]: Without dead ends: 51 [2022-03-01 17:53:09,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:53:09,304 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 18 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:09,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 32 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:53:09,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-01 17:53:09,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2022-03-01 17:53:09,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.880952380952381) internal successors, (79), 42 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:09,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 79 transitions. [2022-03-01 17:53:09,309 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 79 transitions. Word has length 16 [2022-03-01 17:53:09,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:09,309 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 79 transitions. [2022-03-01 17:53:09,309 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) [2022-03-01 17:53:09,309 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 79 transitions. [2022-03-01 17:53:09,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:53:09,310 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:09,310 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:09,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-01 17:53:09,310 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:53:09,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:09,311 INFO L85 PathProgramCache]: Analyzing trace with hash 812220571, now seen corresponding path program 2 times [2022-03-01 17:53:09,311 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:09,311 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951644988] [2022-03-01 17:53:09,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:09,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:09,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:09,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:09,375 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:09,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951644988] [2022-03-01 17:53:09,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951644988] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:53:09,376 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:53:09,377 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-01 17:53:09,377 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686351105] [2022-03-01 17:53:09,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:53:09,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 17:53:09,379 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:09,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 17:53:09,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-01 17:53:09,382 INFO L87 Difference]: Start difference. First operand 43 states and 79 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) [2022-03-01 17:53:09,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:09,446 INFO L93 Difference]: Finished difference Result 51 states and 92 transitions. [2022-03-01 17:53:09,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-01 17:53:09,446 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 [2022-03-01 17:53:09,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:09,447 INFO L225 Difference]: With dead ends: 51 [2022-03-01 17:53:09,447 INFO L226 Difference]: Without dead ends: 49 [2022-03-01 17:53:09,448 INFO L932 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 [2022-03-01 17:53:09,448 INFO L933 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 [2022-03-01 17:53:09,449 INFO L934 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] [2022-03-01 17:53:09,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-03-01 17:53:09,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2022-03-01 17:53:09,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 42 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:09,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 78 transitions. [2022-03-01 17:53:09,460 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 78 transitions. Word has length 16 [2022-03-01 17:53:09,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:09,460 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 78 transitions. [2022-03-01 17:53:09,462 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) [2022-03-01 17:53:09,462 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 78 transitions. [2022-03-01 17:53:09,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-01 17:53:09,462 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:09,462 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:09,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-01 17:53:09,463 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:53:09,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:09,463 INFO L85 PathProgramCache]: Analyzing trace with hash -247842829, now seen corresponding path program 1 times [2022-03-01 17:53:09,463 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:09,463 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131683870] [2022-03-01 17:53:09,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:09,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:09,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:09,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:09,497 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:09,497 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131683870] [2022-03-01 17:53:09,497 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131683870] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:09,497 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077962522] [2022-03-01 17:53:09,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:09,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:09,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:09,499 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:09,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-01 17:53:09,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:09,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:53:09,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:09,582 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:53:09,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:53:09,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:09,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:09,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-03-01 17:53:09,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-03-01 17:53:09,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:09,661 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077962522] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:09,661 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:09,661 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-03-01 17:53:09,662 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123453552] [2022-03-01 17:53:09,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:09,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-01 17:53:09,662 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:09,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-01 17:53:09,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-01 17:53:09,663 INFO L87 Difference]: Start difference. First operand 43 states and 78 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) [2022-03-01 17:53:09,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:09,689 INFO L93 Difference]: Finished difference Result 99 states and 186 transitions. [2022-03-01 17:53:09,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-01 17:53:09,690 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 [2022-03-01 17:53:09,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:09,692 INFO L225 Difference]: With dead ends: 99 [2022-03-01 17:53:09,692 INFO L226 Difference]: Without dead ends: 92 [2022-03-01 17:53:09,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-01 17:53:09,694 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 11 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:09,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 46 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:53:09,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-03-01 17:53:09,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 69. [2022-03-01 17:53:09,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.0441176470588234) internal successors, (139), 68 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:09,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 139 transitions. [2022-03-01 17:53:09,707 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 139 transitions. Word has length 18 [2022-03-01 17:53:09,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:09,707 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 139 transitions. [2022-03-01 17:53:09,707 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) [2022-03-01 17:53:09,707 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 139 transitions. [2022-03-01 17:53:09,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-01 17:53:09,708 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:09,708 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:09,729 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-01 17:53:09,923 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,SelfDestructingSolverStorable5 [2022-03-01 17:53:09,924 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:53:09,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:09,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1428664589, now seen corresponding path program 2 times [2022-03-01 17:53:09,924 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:09,924 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135620387] [2022-03-01 17:53:09,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:09,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:09,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:09,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:53:09,973 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:09,973 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135620387] [2022-03-01 17:53:09,973 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135620387] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:53:09,973 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:53:09,973 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-01 17:53:09,973 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611585046] [2022-03-01 17:53:09,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:53:09,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-01 17:53:09,974 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:09,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-01 17:53:09,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-01 17:53:09,975 INFO L87 Difference]: Start difference. First operand 69 states and 139 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) [2022-03-01 17:53:09,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:09,994 INFO L93 Difference]: Finished difference Result 118 states and 233 transitions. [2022-03-01 17:53:09,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-01 17:53:09,995 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 [2022-03-01 17:53:09,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:09,996 INFO L225 Difference]: With dead ends: 118 [2022-03-01 17:53:09,996 INFO L226 Difference]: Without dead ends: 111 [2022-03-01 17:53:09,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-01 17:53:09,997 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 10 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:09,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 48 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:53:09,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-03-01 17:53:10,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 86. [2022-03-01 17:53:10,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.1294117647058823) 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) [2022-03-01 17:53:10,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 181 transitions. [2022-03-01 17:53:10,002 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 181 transitions. Word has length 18 [2022-03-01 17:53:10,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:10,002 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 181 transitions. [2022-03-01 17:53:10,002 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) [2022-03-01 17:53:10,003 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 181 transitions. [2022-03-01 17:53:10,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:53:10,003 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:10,004 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:10,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-01 17:53:10,004 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:53:10,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:10,004 INFO L85 PathProgramCache]: Analyzing trace with hash 332355189, now seen corresponding path program 3 times [2022-03-01 17:53:10,004 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:10,005 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541087745] [2022-03-01 17:53:10,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:10,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:10,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:10,087 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:10,087 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:10,087 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541087745] [2022-03-01 17:53:10,087 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541087745] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:10,087 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605358444] [2022-03-01 17:53:10,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:53:10,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:10,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:10,089 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:10,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-01 17:53:10,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:53:10,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:10,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 17:53:10,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:10,257 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:10,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:10,361 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:10,362 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605358444] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:10,362 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:10,363 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-03-01 17:53:10,363 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989126549] [2022-03-01 17:53:10,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:10,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:53:10,364 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:10,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:53:10,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:53:10,364 INFO L87 Difference]: Start difference. First operand 86 states and 181 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:10,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:10,750 INFO L93 Difference]: Finished difference Result 226 states and 433 transitions. [2022-03-01 17:53:10,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:53:10,752 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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 20 [2022-03-01 17:53:10,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:10,754 INFO L225 Difference]: With dead ends: 226 [2022-03-01 17:53:10,754 INFO L226 Difference]: Without dead ends: 226 [2022-03-01 17:53:10,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=756, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:53:10,755 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 141 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:10,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 107 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:53:10,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-03-01 17:53:10,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 88. [2022-03-01 17:53:10,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.1494252873563218) internal successors, (187), 87 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:10,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 187 transitions. [2022-03-01 17:53:10,769 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 187 transitions. Word has length 20 [2022-03-01 17:53:10,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:10,769 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 187 transitions. [2022-03-01 17:53:10,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:10,770 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 187 transitions. [2022-03-01 17:53:10,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:53:10,770 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:10,770 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:10,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:10,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:10,971 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:53:10,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:10,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1418390705, now seen corresponding path program 4 times [2022-03-01 17:53:10,972 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:10,972 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9330614] [2022-03-01 17:53:10,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:10,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:10,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:11,028 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:11,028 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:11,028 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9330614] [2022-03-01 17:53:11,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9330614] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:11,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387747452] [2022-03-01 17:53:11,029 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:53:11,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:11,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:11,030 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:11,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-01 17:53:11,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:53:11,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:11,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 17:53:11,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:11,191 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:11,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:11,272 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:11,272 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387747452] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:11,272 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:11,272 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-01 17:53:11,272 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70802650] [2022-03-01 17:53:11,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:11,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:53:11,274 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:11,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:53:11,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:53:11,275 INFO L87 Difference]: Start difference. First operand 88 states and 187 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) [2022-03-01 17:53:11,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:11,602 INFO L93 Difference]: Finished difference Result 257 states and 488 transitions. [2022-03-01 17:53:11,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:53:11,602 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 [2022-03-01 17:53:11,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:11,603 INFO L225 Difference]: With dead ends: 257 [2022-03-01 17:53:11,603 INFO L226 Difference]: Without dead ends: 234 [2022-03-01 17:53:11,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:53:11,604 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 194 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:11,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 67 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:53:11,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-03-01 17:53:11,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 108. [2022-03-01 17:53:11,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.149532710280374) internal successors, (230), 107 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) [2022-03-01 17:53:11,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 230 transitions. [2022-03-01 17:53:11,610 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 230 transitions. Word has length 20 [2022-03-01 17:53:11,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:11,611 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 230 transitions. [2022-03-01 17:53:11,611 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) [2022-03-01 17:53:11,611 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 230 transitions. [2022-03-01 17:53:11,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:53:11,612 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:11,612 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:11,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:11,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:11,812 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:53:11,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:11,813 INFO L85 PathProgramCache]: Analyzing trace with hash 985887361, now seen corresponding path program 5 times [2022-03-01 17:53:11,813 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:11,813 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025153791] [2022-03-01 17:53:11,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:11,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:11,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:11,867 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:11,868 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:11,868 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025153791] [2022-03-01 17:53:11,868 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025153791] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:11,868 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418886548] [2022-03-01 17:53:11,868 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:53:11,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:11,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:11,869 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:11,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-01 17:53:11,912 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:53:11,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:11,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 17:53:11,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:12,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:12,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:12,142 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:12,142 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418886548] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:12,143 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:12,143 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-03-01 17:53:12,143 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870062977] [2022-03-01 17:53:12,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:12,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:53:12,144 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:12,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:53:12,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:53:12,149 INFO L87 Difference]: Start difference. First operand 108 states and 230 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:12,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:12,530 INFO L93 Difference]: Finished difference Result 275 states and 516 transitions. [2022-03-01 17:53:12,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-01 17:53:12,530 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-01 17:53:12,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:12,532 INFO L225 Difference]: With dead ends: 275 [2022-03-01 17:53:12,532 INFO L226 Difference]: Without dead ends: 275 [2022-03-01 17:53:12,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=692, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:53:12,533 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 223 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:12,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 114 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:53:12,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-03-01 17:53:12,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 131. [2022-03-01 17:53:12,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.230769230769231) internal successors, (290), 130 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) [2022-03-01 17:53:12,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 290 transitions. [2022-03-01 17:53:12,540 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 290 transitions. Word has length 20 [2022-03-01 17:53:12,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:12,540 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 290 transitions. [2022-03-01 17:53:12,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:12,541 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 290 transitions. [2022-03-01 17:53:12,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:53:12,541 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:12,541 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:12,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:12,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-01 17:53:12,742 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:53:12,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:12,743 INFO L85 PathProgramCache]: Analyzing trace with hash -398010721, now seen corresponding path program 6 times [2022-03-01 17:53:12,743 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:12,743 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734163094] [2022-03-01 17:53:12,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:12,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:12,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:12,797 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:12,797 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:12,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734163094] [2022-03-01 17:53:12,798 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734163094] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:12,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182235859] [2022-03-01 17:53:12,798 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:53:12,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:12,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:12,799 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:12,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-01 17:53:12,823 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:53:12,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:12,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 17:53:12,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:12,963 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:12,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:13,077 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:13,077 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182235859] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:13,077 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:13,077 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-03-01 17:53:13,078 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769359714] [2022-03-01 17:53:13,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:13,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:53:13,078 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:13,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:53:13,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:53:13,079 INFO L87 Difference]: Start difference. First operand 131 states and 290 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) [2022-03-01 17:53:13,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:13,382 INFO L93 Difference]: Finished difference Result 208 states and 429 transitions. [2022-03-01 17:53:13,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:53:13,382 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 [2022-03-01 17:53:13,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:13,383 INFO L225 Difference]: With dead ends: 208 [2022-03-01 17:53:13,383 INFO L226 Difference]: Without dead ends: 204 [2022-03-01 17:53:13,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=259, Invalid=553, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:53:13,384 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 125 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:13,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 52 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:53:13,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-03-01 17:53:13,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 133. [2022-03-01 17:53:13,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.212121212121212) internal successors, (292), 132 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:13,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 292 transitions. [2022-03-01 17:53:13,390 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 292 transitions. Word has length 20 [2022-03-01 17:53:13,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:13,390 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 292 transitions. [2022-03-01 17:53:13,390 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) [2022-03-01 17:53:13,390 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 292 transitions. [2022-03-01 17:53:13,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:53:13,391 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:13,391 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:13,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:13,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:13,614 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:53:13,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:13,614 INFO L85 PathProgramCache]: Analyzing trace with hash -182759819, now seen corresponding path program 7 times [2022-03-01 17:53:13,614 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:13,615 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310193938] [2022-03-01 17:53:13,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:13,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:13,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:13,679 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:53:13,679 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:13,679 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310193938] [2022-03-01 17:53:13,680 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310193938] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:13,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592445681] [2022-03-01 17:53:13,680 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:53:13,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:13,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:13,684 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:13,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-01 17:53:13,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:13,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 17:53:13,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:13,831 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:13,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:13,919 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:13,919 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592445681] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:13,919 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:13,919 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-03-01 17:53:13,919 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833236175] [2022-03-01 17:53:13,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:13,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:53:13,920 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:13,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:53:13,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:53:13,921 INFO L87 Difference]: Start difference. First operand 133 states and 292 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:14,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:14,375 INFO L93 Difference]: Finished difference Result 362 states and 711 transitions. [2022-03-01 17:53:14,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 17:53:14,375 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:53:14,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:14,377 INFO L225 Difference]: With dead ends: 362 [2022-03-01 17:53:14,377 INFO L226 Difference]: Without dead ends: 362 [2022-03-01 17:53:14,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=434, Invalid=972, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:53:14,379 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 218 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:14,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 95 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:53:14,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-03-01 17:53:14,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 176. [2022-03-01 17:53:14,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.297142857142857) internal successors, (402), 175 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:14,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 402 transitions. [2022-03-01 17:53:14,386 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 402 transitions. Word has length 20 [2022-03-01 17:53:14,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:14,386 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 402 transitions. [2022-03-01 17:53:14,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:14,387 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 402 transitions. [2022-03-01 17:53:14,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:53:14,387 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:14,387 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:14,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:14,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:14,612 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:53:14,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:14,612 INFO L85 PathProgramCache]: Analyzing trace with hash 520045489, now seen corresponding path program 8 times [2022-03-01 17:53:14,612 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:14,612 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585205409] [2022-03-01 17:53:14,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:14,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:14,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:14,664 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:53:14,664 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:14,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585205409] [2022-03-01 17:53:14,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585205409] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:14,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359683048] [2022-03-01 17:53:14,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:53:14,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:14,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:14,666 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:14,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-01 17:53:14,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:53:14,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:14,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 17:53:14,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:14,824 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:14,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:14,913 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:14,913 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359683048] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:14,913 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:14,913 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-03-01 17:53:14,913 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197460326] [2022-03-01 17:53:14,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:14,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:53:14,914 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:14,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:53:14,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:53:14,915 INFO L87 Difference]: Start difference. First operand 176 states and 402 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:15,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:15,182 INFO L93 Difference]: Finished difference Result 248 states and 522 transitions. [2022-03-01 17:53:15,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:53:15,183 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:53:15,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:15,184 INFO L225 Difference]: With dead ends: 248 [2022-03-01 17:53:15,185 INFO L226 Difference]: Without dead ends: 242 [2022-03-01 17:53:15,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:53:15,185 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 84 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:15,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 89 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:53:15,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-03-01 17:53:15,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 182. [2022-03-01 17:53:15,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.3259668508287294) internal successors, (421), 181 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:15,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 421 transitions. [2022-03-01 17:53:15,192 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 421 transitions. Word has length 20 [2022-03-01 17:53:15,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:15,192 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 421 transitions. [2022-03-01 17:53:15,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:15,192 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 421 transitions. [2022-03-01 17:53:15,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:53:15,193 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:15,193 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:15,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:15,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-01 17:53:15,416 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:53:15,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:15,416 INFO L85 PathProgramCache]: Analyzing trace with hash -2128780453, now seen corresponding path program 9 times [2022-03-01 17:53:15,416 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:15,416 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514617895] [2022-03-01 17:53:15,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:15,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:15,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:15,462 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:53:15,463 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:15,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514617895] [2022-03-01 17:53:15,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514617895] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:15,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486840832] [2022-03-01 17:53:15,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:53:15,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:15,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:15,464 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:15,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-01 17:53:15,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:53:15,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:15,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 17:53:15,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:15,608 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:15,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:15,707 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:15,707 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486840832] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:15,708 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:15,708 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-03-01 17:53:15,708 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566838653] [2022-03-01 17:53:15,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:15,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:53:15,708 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:15,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:53:15,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:53:15,709 INFO L87 Difference]: Start difference. First operand 182 states and 421 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) [2022-03-01 17:53:16,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:16,035 INFO L93 Difference]: Finished difference Result 300 states and 621 transitions. [2022-03-01 17:53:16,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:53:16,036 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 [2022-03-01 17:53:16,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:16,037 INFO L225 Difference]: With dead ends: 300 [2022-03-01 17:53:16,037 INFO L226 Difference]: Without dead ends: 296 [2022-03-01 17:53:16,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=309, Invalid=683, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:53:16,038 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 224 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:16,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 43 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:53:16,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-03-01 17:53:16,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 182. [2022-03-01 17:53:16,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.314917127071823) internal successors, (419), 181 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:16,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 419 transitions. [2022-03-01 17:53:16,045 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 419 transitions. Word has length 20 [2022-03-01 17:53:16,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:16,045 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 419 transitions. [2022-03-01 17:53:16,045 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) [2022-03-01 17:53:16,045 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 419 transitions. [2022-03-01 17:53:16,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:53:16,046 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:16,046 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:16,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:16,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-01 17:53:16,263 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:53:16,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:16,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1659840577, now seen corresponding path program 10 times [2022-03-01 17:53:16,264 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:16,264 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696447031] [2022-03-01 17:53:16,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:16,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:16,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:16,313 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:16,314 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:16,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696447031] [2022-03-01 17:53:16,314 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696447031] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:16,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206124068] [2022-03-01 17:53:16,314 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:53:16,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:16,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:16,315 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:16,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-01 17:53:16,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:53:16,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:16,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 17:53:16,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:16,457 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:16,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:16,530 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:16,531 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206124068] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:16,531 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:16,531 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-01 17:53:16,531 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654302035] [2022-03-01 17:53:16,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:16,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:53:16,531 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:16,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:53:16,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:53:16,532 INFO L87 Difference]: Start difference. First operand 182 states and 419 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:16,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:16,823 INFO L93 Difference]: Finished difference Result 296 states and 623 transitions. [2022-03-01 17:53:16,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:53:16,823 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-01 17:53:16,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:16,825 INFO L225 Difference]: With dead ends: 296 [2022-03-01 17:53:16,825 INFO L226 Difference]: Without dead ends: 284 [2022-03-01 17:53:16,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:53:16,826 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 160 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:16,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 58 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:53:16,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-03-01 17:53:16,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 193. [2022-03-01 17:53:16,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.3125) internal successors, (444), 192 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:16,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 444 transitions. [2022-03-01 17:53:16,832 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 444 transitions. Word has length 20 [2022-03-01 17:53:16,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:16,832 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 444 transitions. [2022-03-01 17:53:16,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:16,833 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 444 transitions. [2022-03-01 17:53:16,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 17:53:16,833 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:16,833 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:16,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:17,055 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,SelfDestructingSolverStorable14 [2022-03-01 17:53:17,055 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:53:17,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:17,056 INFO L85 PathProgramCache]: Analyzing trace with hash 642937523, now seen corresponding path program 11 times [2022-03-01 17:53:17,056 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:17,056 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555648591] [2022-03-01 17:53:17,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:17,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:17,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:17,095 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:17,096 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:17,096 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555648591] [2022-03-01 17:53:17,096 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555648591] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:17,096 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420158275] [2022-03-01 17:53:17,096 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:53:17,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:17,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:17,097 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:17,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-01 17:53:17,125 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:53:17,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:17,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-01 17:53:17,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:17,167 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:17,168 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-03-01 17:53:17,273 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:17,274 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-03-01 17:53:17,284 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:17,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:17,333 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:17,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 32 [2022-03-01 17:53:17,338 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:17,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2022-03-01 17:53:17,356 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:17,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420158275] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:17,356 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:17,356 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 9 [2022-03-01 17:53:17,356 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473475402] [2022-03-01 17:53:17,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:17,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 17:53:17,357 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:17,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 17:53:17,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:53:17,357 INFO L87 Difference]: Start difference. First operand 193 states and 444 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:17,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:17,425 INFO L93 Difference]: Finished difference Result 399 states and 869 transitions. [2022-03-01 17:53:17,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-01 17:53:17,425 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:53:17,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:17,427 INFO L225 Difference]: With dead ends: 399 [2022-03-01 17:53:17,427 INFO L226 Difference]: Without dead ends: 392 [2022-03-01 17:53:17,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:53:17,428 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 46 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:17,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 190 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 108 Invalid, 0 Unknown, 12 Unchecked, 0.1s Time] [2022-03-01 17:53:17,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-03-01 17:53:17,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 271. [2022-03-01 17:53:17,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 2.3851851851851853) internal successors, (644), 270 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:17,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 644 transitions. [2022-03-01 17:53:17,436 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 644 transitions. Word has length 22 [2022-03-01 17:53:17,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:17,436 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 644 transitions. [2022-03-01 17:53:17,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:17,436 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 644 transitions. [2022-03-01 17:53:17,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 17:53:17,437 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:17,437 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:17,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:17,650 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,SelfDestructingSolverStorable15 [2022-03-01 17:53:17,651 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:53:17,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:17,651 INFO L85 PathProgramCache]: Analyzing trace with hash 467064055, now seen corresponding path program 12 times [2022-03-01 17:53:17,651 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:17,651 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862907453] [2022-03-01 17:53:17,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:17,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:17,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:17,688 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:17,688 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:17,688 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862907453] [2022-03-01 17:53:17,688 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862907453] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:17,689 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877568991] [2022-03-01 17:53:17,689 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:53:17,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:17,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:17,690 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:17,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-01 17:53:17,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:53:17,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:17,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 17:53:17,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:17,829 INFO L353 Elim1Store]: treesize reduction 21, result has 43.2 percent of original size [2022-03-01 17:53:17,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 35 [2022-03-01 17:53:17,836 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:17,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 20 [2022-03-01 17:53:17,850 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:17,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:17,972 INFO L353 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2022-03-01 17:53:17,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 46 [2022-03-01 17:53:17,980 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:17,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 28 [2022-03-01 17:53:18,000 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:18,001 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877568991] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:18,001 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:18,001 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 11 [2022-03-01 17:53:18,001 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631587528] [2022-03-01 17:53:18,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:18,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 17:53:18,002 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:18,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 17:53:18,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:53:18,002 INFO L87 Difference]: Start difference. First operand 271 states and 644 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:18,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:18,069 INFO L93 Difference]: Finished difference Result 341 states and 745 transitions. [2022-03-01 17:53:18,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-01 17:53:18,069 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 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 22 [2022-03-01 17:53:18,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:18,071 INFO L225 Difference]: With dead ends: 341 [2022-03-01 17:53:18,071 INFO L226 Difference]: Without dead ends: 338 [2022-03-01 17:53:18,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:53:18,072 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 55 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:18,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 160 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:53:18,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-03-01 17:53:18,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 263. [2022-03-01 17:53:18,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.377862595419847) internal successors, (623), 262 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:18,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 623 transitions. [2022-03-01 17:53:18,081 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 623 transitions. Word has length 22 [2022-03-01 17:53:18,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:18,081 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 623 transitions. [2022-03-01 17:53:18,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:18,082 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 623 transitions. [2022-03-01 17:53:18,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 17:53:18,082 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:18,082 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:18,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:18,295 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,SelfDestructingSolverStorable16 [2022-03-01 17:53:18,295 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:53:18,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:18,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1436229453, now seen corresponding path program 13 times [2022-03-01 17:53:18,296 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:18,296 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698992887] [2022-03-01 17:53:18,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:18,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:18,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:18,329 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:53:18,329 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:18,329 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698992887] [2022-03-01 17:53:18,329 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698992887] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:18,329 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540897881] [2022-03-01 17:53:18,330 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:53:18,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:18,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:18,331 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:18,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-01 17:53:18,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:18,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-01 17:53:18,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:18,414 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:18,414 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 25 [2022-03-01 17:53:18,440 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:18,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2022-03-01 17:53:18,456 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:53:18,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:18,507 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:18,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 32 [2022-03-01 17:53:18,511 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:18,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2022-03-01 17:53:18,541 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:53:18,541 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540897881] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:18,541 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:18,541 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 10 [2022-03-01 17:53:18,541 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525095587] [2022-03-01 17:53:18,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:18,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:53:18,542 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:18,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:53:18,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:53:18,542 INFO L87 Difference]: Start difference. First operand 263 states and 623 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:18,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:18,602 INFO L93 Difference]: Finished difference Result 443 states and 1002 transitions. [2022-03-01 17:53:18,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-01 17:53:18,603 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:53:18,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:18,605 INFO L225 Difference]: With dead ends: 443 [2022-03-01 17:53:18,605 INFO L226 Difference]: Without dead ends: 427 [2022-03-01 17:53:18,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:53:18,606 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 58 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:18,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 172 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:53:18,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2022-03-01 17:53:18,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 318. [2022-03-01 17:53:18,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.444794952681388) internal successors, (775), 317 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:18,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 775 transitions. [2022-03-01 17:53:18,615 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 775 transitions. Word has length 22 [2022-03-01 17:53:18,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:18,615 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 775 transitions. [2022-03-01 17:53:18,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:18,615 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 775 transitions. [2022-03-01 17:53:18,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-01 17:53:18,616 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:18,616 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:18,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:18,817 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,SelfDestructingSolverStorable17 [2022-03-01 17:53:18,817 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:53:18,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:18,817 INFO L85 PathProgramCache]: Analyzing trace with hash -976461133, now seen corresponding path program 14 times [2022-03-01 17:53:18,817 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:18,818 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822400155] [2022-03-01 17:53:18,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:18,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:18,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:18,848 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:53:18,848 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:18,849 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822400155] [2022-03-01 17:53:18,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822400155] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:18,849 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947477803] [2022-03-01 17:53:18,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:53:18,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:18,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:18,850 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:18,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-01 17:53:18,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:53:18,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:18,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-01 17:53:18,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:18,911 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:18,911 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-03-01 17:53:18,989 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:18,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-03-01 17:53:19,010 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:53:19,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:19,061 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:19,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 32 [2022-03-01 17:53:19,068 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:19,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2022-03-01 17:53:19,090 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:53:19,091 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947477803] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:19,091 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:19,091 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 9 [2022-03-01 17:53:19,091 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929148410] [2022-03-01 17:53:19,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:19,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 17:53:19,092 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:19,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 17:53:19,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:53:19,093 INFO L87 Difference]: Start difference. First operand 318 states and 775 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:19,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:19,148 INFO L93 Difference]: Finished difference Result 536 states and 1220 transitions. [2022-03-01 17:53:19,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-01 17:53:19,149 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:53:19,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:19,151 INFO L225 Difference]: With dead ends: 536 [2022-03-01 17:53:19,151 INFO L226 Difference]: Without dead ends: 529 [2022-03-01 17:53:19,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:53:19,152 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 60 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:19,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 183 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 48 Unchecked, 0.0s Time] [2022-03-01 17:53:19,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2022-03-01 17:53:19,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 374. [2022-03-01 17:53:19,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 373 states have (on average 2.474530831099196) internal successors, (923), 373 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:19,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 923 transitions. [2022-03-01 17:53:19,163 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 923 transitions. Word has length 22 [2022-03-01 17:53:19,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:19,163 INFO L470 AbstractCegarLoop]: Abstraction has 374 states and 923 transitions. [2022-03-01 17:53:19,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:19,164 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 923 transitions. [2022-03-01 17:53:19,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:53:19,165 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:19,165 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:19,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:19,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:19,379 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:53:19,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:19,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1538228171, now seen corresponding path program 15 times [2022-03-01 17:53:19,380 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:19,380 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818883938] [2022-03-01 17:53:19,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:19,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:19,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:19,470 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:19,470 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:19,471 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818883938] [2022-03-01 17:53:19,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818883938] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:19,471 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772376816] [2022-03-01 17:53:19,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:53:19,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:19,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:19,472 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:19,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-01 17:53:19,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:53:19,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:19,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:53:19,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:19,679 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:19,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:19,780 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:19,781 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772376816] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:19,781 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:19,781 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-03-01 17:53:19,781 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135794211] [2022-03-01 17:53:19,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:19,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:53:19,782 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:19,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:53:19,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:53:19,782 INFO L87 Difference]: Start difference. First operand 374 states and 923 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:20,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:20,438 INFO L93 Difference]: Finished difference Result 702 states and 1541 transitions. [2022-03-01 17:53:20,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-01 17:53:20,438 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:53:20,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:20,441 INFO L225 Difference]: With dead ends: 702 [2022-03-01 17:53:20,441 INFO L226 Difference]: Without dead ends: 702 [2022-03-01 17:53:20,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=652, Invalid=1798, Unknown=0, NotChecked=0, Total=2450 [2022-03-01 17:53:20,443 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 189 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:20,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 128 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:53:20,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2022-03-01 17:53:20,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 325. [2022-03-01 17:53:20,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.450617283950617) internal successors, (794), 324 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:20,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 794 transitions. [2022-03-01 17:53:20,455 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 794 transitions. Word has length 24 [2022-03-01 17:53:20,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:20,456 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 794 transitions. [2022-03-01 17:53:20,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:20,456 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 794 transitions. [2022-03-01 17:53:20,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:53:20,457 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:20,457 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:20,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:20,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:20,676 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:53:20,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:20,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1535150223, now seen corresponding path program 16 times [2022-03-01 17:53:20,676 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:20,676 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499319517] [2022-03-01 17:53:20,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:20,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:20,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:20,746 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:20,746 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:20,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499319517] [2022-03-01 17:53:20,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499319517] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:20,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054392103] [2022-03-01 17:53:20,746 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:53:20,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:20,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:20,748 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:20,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-01 17:53:20,782 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:53:20,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:20,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:53:20,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:20,936 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:20,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:21,039 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:21,039 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054392103] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:21,040 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:21,040 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-03-01 17:53:21,040 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388232020] [2022-03-01 17:53:21,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:21,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:53:21,040 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:21,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:53:21,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:53:21,041 INFO L87 Difference]: Start difference. First operand 325 states and 794 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:21,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:21,681 INFO L93 Difference]: Finished difference Result 786 states and 1670 transitions. [2022-03-01 17:53:21,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-01 17:53:21,682 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:53:21,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:21,684 INFO L225 Difference]: With dead ends: 786 [2022-03-01 17:53:21,684 INFO L226 Difference]: Without dead ends: 742 [2022-03-01 17:53:21,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=562, Invalid=1508, Unknown=0, NotChecked=0, Total=2070 [2022-03-01 17:53:21,685 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 300 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:21,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 127 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:53:21,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2022-03-01 17:53:21,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 342. [2022-03-01 17:53:21,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.4134897360703813) internal successors, (823), 341 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) [2022-03-01 17:53:21,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 823 transitions. [2022-03-01 17:53:21,699 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 823 transitions. Word has length 24 [2022-03-01 17:53:21,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:21,699 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 823 transitions. [2022-03-01 17:53:21,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:21,699 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 823 transitions. [2022-03-01 17:53:21,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:53:21,700 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:21,700 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:21,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:21,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:21,915 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:53:21,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:21,916 INFO L85 PathProgramCache]: Analyzing trace with hash -871610747, now seen corresponding path program 17 times [2022-03-01 17:53:21,916 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:21,916 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640339095] [2022-03-01 17:53:21,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:21,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:21,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:21,977 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:21,978 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:21,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640339095] [2022-03-01 17:53:21,978 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640339095] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:21,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499785516] [2022-03-01 17:53:21,978 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:53:21,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:21,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:21,979 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:21,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-01 17:53:22,012 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:53:22,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:22,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:53:22,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:22,196 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:22,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:22,351 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:22,352 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499785516] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:22,352 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:22,352 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 20 [2022-03-01 17:53:22,352 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196777494] [2022-03-01 17:53:22,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:22,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:53:22,352 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:22,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:53:22,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:53:22,353 INFO L87 Difference]: Start difference. First operand 342 states and 823 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) [2022-03-01 17:53:23,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:23,133 INFO L93 Difference]: Finished difference Result 816 states and 1756 transitions. [2022-03-01 17:53:23,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-01 17:53:23,134 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 [2022-03-01 17:53:23,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:23,137 INFO L225 Difference]: With dead ends: 816 [2022-03-01 17:53:23,137 INFO L226 Difference]: Without dead ends: 814 [2022-03-01 17:53:23,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=856, Invalid=2114, Unknown=0, NotChecked=0, Total=2970 [2022-03-01 17:53:23,139 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 327 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:23,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 141 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:53:23,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2022-03-01 17:53:23,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 404. [2022-03-01 17:53:23,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.424317617866005) internal successors, (977), 403 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:23,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 977 transitions. [2022-03-01 17:53:23,160 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 977 transitions. Word has length 24 [2022-03-01 17:53:23,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:23,160 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 977 transitions. [2022-03-01 17:53:23,160 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) [2022-03-01 17:53:23,160 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 977 transitions. [2022-03-01 17:53:23,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:53:23,161 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:23,161 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:23,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:23,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:23,371 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:53:23,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:23,372 INFO L85 PathProgramCache]: Analyzing trace with hash 2039458467, now seen corresponding path program 18 times [2022-03-01 17:53:23,372 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:23,372 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232921455] [2022-03-01 17:53:23,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:23,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:23,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:23,436 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:23,436 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:23,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232921455] [2022-03-01 17:53:23,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232921455] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:23,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068626893] [2022-03-01 17:53:23,437 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:53:23,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:23,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:23,438 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:23,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-01 17:53:23,459 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-01 17:53:23,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:23,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:53:23,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:23,617 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:23,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:23,751 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:23,751 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068626893] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:23,751 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:23,751 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 19 [2022-03-01 17:53:23,751 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459427201] [2022-03-01 17:53:23,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:23,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:53:23,752 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:23,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:53:23,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:53:23,752 INFO L87 Difference]: Start difference. First operand 404 states and 977 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) [2022-03-01 17:53:24,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:24,207 INFO L93 Difference]: Finished difference Result 548 states and 1247 transitions. [2022-03-01 17:53:24,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 17:53:24,207 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 [2022-03-01 17:53:24,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:24,209 INFO L225 Difference]: With dead ends: 548 [2022-03-01 17:53:24,210 INFO L226 Difference]: Without dead ends: 544 [2022-03-01 17:53:24,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=539, Invalid=1267, Unknown=0, NotChecked=0, Total=1806 [2022-03-01 17:53:24,211 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 150 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:24,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 75 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:53:24,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2022-03-01 17:53:24,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 404. [2022-03-01 17:53:24,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.4218362282878414) internal successors, (976), 403 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:24,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 976 transitions. [2022-03-01 17:53:24,222 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 976 transitions. Word has length 24 [2022-03-01 17:53:24,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:24,222 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 976 transitions. [2022-03-01 17:53:24,222 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) [2022-03-01 17:53:24,222 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 976 transitions. [2022-03-01 17:53:24,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:53:24,223 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:24,223 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:24,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:24,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:24,436 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:53:24,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:24,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1840145777, now seen corresponding path program 19 times [2022-03-01 17:53:24,436 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:24,436 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767978601] [2022-03-01 17:53:24,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:24,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:24,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:24,499 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:53:24,500 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:24,500 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767978601] [2022-03-01 17:53:24,500 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767978601] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:24,500 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593007268] [2022-03-01 17:53:24,500 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:53:24,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:24,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:24,504 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:24,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-01 17:53:24,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:24,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:53:24,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:24,695 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:24,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:24,825 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:24,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593007268] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:24,825 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:24,825 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 19 [2022-03-01 17:53:24,825 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449950300] [2022-03-01 17:53:24,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:24,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:53:24,826 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:24,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:53:24,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:53:24,827 INFO L87 Difference]: Start difference. First operand 404 states and 976 transitions. Second operand has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:25,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:25,295 INFO L93 Difference]: Finished difference Result 648 states and 1454 transitions. [2022-03-01 17:53:25,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 17:53:25,299 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:53:25,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:25,302 INFO L225 Difference]: With dead ends: 648 [2022-03-01 17:53:25,302 INFO L226 Difference]: Without dead ends: 636 [2022-03-01 17:53:25,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=445, Invalid=1115, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 17:53:25,303 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 176 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:25,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 97 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:53:25,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2022-03-01 17:53:25,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 426. [2022-03-01 17:53:25,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 2.4376470588235293) internal successors, (1036), 425 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:25,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 1036 transitions. [2022-03-01 17:53:25,315 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 1036 transitions. Word has length 24 [2022-03-01 17:53:25,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:25,315 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 1036 transitions. [2022-03-01 17:53:25,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:25,315 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 1036 transitions. [2022-03-01 17:53:25,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:53:25,316 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:25,316 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:25,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:25,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:25,531 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:53:25,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:25,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1315026431, now seen corresponding path program 20 times [2022-03-01 17:53:25,532 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:25,532 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464499384] [2022-03-01 17:53:25,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:25,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:25,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:25,609 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:25,609 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:25,609 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464499384] [2022-03-01 17:53:25,610 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464499384] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:25,610 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065269504] [2022-03-01 17:53:25,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:53:25,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:25,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:25,611 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:25,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-01 17:53:25,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:53:25,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:25,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:53:25,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:25,796 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:25,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:25,897 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:25,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065269504] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:25,898 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:25,898 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-03-01 17:53:25,898 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076258154] [2022-03-01 17:53:25,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:25,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:53:25,898 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:25,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:53:25,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:53:25,899 INFO L87 Difference]: Start difference. First operand 426 states and 1036 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:26,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:26,351 INFO L93 Difference]: Finished difference Result 690 states and 1541 transitions. [2022-03-01 17:53:26,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:53:26,351 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:53:26,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:26,353 INFO L225 Difference]: With dead ends: 690 [2022-03-01 17:53:26,353 INFO L226 Difference]: Without dead ends: 676 [2022-03-01 17:53:26,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=544, Invalid=1348, Unknown=0, NotChecked=0, Total=1892 [2022-03-01 17:53:26,354 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 209 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:26,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 100 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:53:26,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2022-03-01 17:53:26,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 412. [2022-03-01 17:53:26,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 2.4184914841849148) internal successors, (994), 411 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:26,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 994 transitions. [2022-03-01 17:53:26,365 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 994 transitions. Word has length 24 [2022-03-01 17:53:26,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:26,365 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 994 transitions. [2022-03-01 17:53:26,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:26,365 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 994 transitions. [2022-03-01 17:53:26,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:53:26,366 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:26,366 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:26,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:26,585 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,SelfDestructingSolverStorable24 [2022-03-01 17:53:26,585 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:53:26,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:26,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1314117941, now seen corresponding path program 21 times [2022-03-01 17:53:26,586 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:26,586 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967247948] [2022-03-01 17:53:26,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:26,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:26,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:26,650 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:53:26,651 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:26,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967247948] [2022-03-01 17:53:26,651 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967247948] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:26,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258920593] [2022-03-01 17:53:26,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:53:26,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:26,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:26,652 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:26,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-01 17:53:26,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:53:26,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:26,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:53:26,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:26,848 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:26,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:26,956 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:26,957 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258920593] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:26,957 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:26,957 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-01 17:53:26,957 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867093483] [2022-03-01 17:53:26,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:26,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:53:26,957 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:26,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:53:26,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:53:26,958 INFO L87 Difference]: Start difference. First operand 412 states and 994 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:27,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:27,670 INFO L93 Difference]: Finished difference Result 858 states and 1852 transitions. [2022-03-01 17:53:27,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-01 17:53:27,670 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:53:27,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:27,673 INFO L225 Difference]: With dead ends: 858 [2022-03-01 17:53:27,673 INFO L226 Difference]: Without dead ends: 858 [2022-03-01 17:53:27,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=815, Invalid=2047, Unknown=0, NotChecked=0, Total=2862 [2022-03-01 17:53:27,674 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 264 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:27,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 181 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:53:27,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2022-03-01 17:53:27,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 429. [2022-03-01 17:53:27,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 2.397196261682243) internal successors, (1026), 428 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:27,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1026 transitions. [2022-03-01 17:53:27,688 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1026 transitions. Word has length 24 [2022-03-01 17:53:27,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:27,688 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 1026 transitions. [2022-03-01 17:53:27,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:27,688 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1026 transitions. [2022-03-01 17:53:27,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:53:27,689 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:27,689 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:27,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:27,905 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,SelfDestructingSolverStorable25 [2022-03-01 17:53:27,906 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:53:27,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:27,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1894813839, now seen corresponding path program 22 times [2022-03-01 17:53:27,906 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:27,906 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608247576] [2022-03-01 17:53:27,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:27,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:27,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:27,985 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:53:27,986 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:27,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608247576] [2022-03-01 17:53:27,986 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608247576] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:27,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096452020] [2022-03-01 17:53:27,986 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:53:27,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:27,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:27,987 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:27,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-01 17:53:28,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:53:28,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:28,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:53:28,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:28,148 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:28,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:28,263 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:28,264 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096452020] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:28,264 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:28,264 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-03-01 17:53:28,264 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713577011] [2022-03-01 17:53:28,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:28,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:53:28,264 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:28,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:53:28,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:53:28,265 INFO L87 Difference]: Start difference. First operand 429 states and 1026 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:28,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:28,669 INFO L93 Difference]: Finished difference Result 588 states and 1296 transitions. [2022-03-01 17:53:28,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:53:28,670 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:53:28,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:28,671 INFO L225 Difference]: With dead ends: 588 [2022-03-01 17:53:28,671 INFO L226 Difference]: Without dead ends: 570 [2022-03-01 17:53:28,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=403, Invalid=1079, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 17:53:28,672 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 152 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:28,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 123 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:53:28,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2022-03-01 17:53:28,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 423. [2022-03-01 17:53:28,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 2.3981042654028437) internal successors, (1012), 422 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:28,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 1012 transitions. [2022-03-01 17:53:28,682 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 1012 transitions. Word has length 24 [2022-03-01 17:53:28,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:28,682 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 1012 transitions. [2022-03-01 17:53:28,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:28,682 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 1012 transitions. [2022-03-01 17:53:28,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:53:28,683 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:28,683 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:28,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:28,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-01 17:53:28,903 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:53:28,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:28,904 INFO L85 PathProgramCache]: Analyzing trace with hash 593064501, now seen corresponding path program 23 times [2022-03-01 17:53:28,904 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:28,904 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120713320] [2022-03-01 17:53:28,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:28,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:28,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:28,964 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:53:28,964 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:28,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120713320] [2022-03-01 17:53:28,964 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120713320] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:28,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82088578] [2022-03-01 17:53:28,964 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:53:28,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:28,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:28,966 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:28,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-01 17:53:28,992 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:53:28,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:28,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:53:28,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:29,135 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:29,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:29,257 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:29,258 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82088578] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:29,258 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:29,258 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2022-03-01 17:53:29,258 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200330141] [2022-03-01 17:53:29,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:29,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:53:29,258 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:29,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:53:29,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:53:29,259 INFO L87 Difference]: Start difference. First operand 423 states and 1012 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 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) [2022-03-01 17:53:30,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:30,076 INFO L93 Difference]: Finished difference Result 1009 states and 2226 transitions. [2022-03-01 17:53:30,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-01 17:53:30,076 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:53:30,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:30,079 INFO L225 Difference]: With dead ends: 1009 [2022-03-01 17:53:30,079 INFO L226 Difference]: Without dead ends: 1009 [2022-03-01 17:53:30,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1356 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1165, Invalid=2741, Unknown=0, NotChecked=0, Total=3906 [2022-03-01 17:53:30,081 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 360 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:30,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 166 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:53:30,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2022-03-01 17:53:30,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 622. [2022-03-01 17:53:30,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 621 states have (on average 2.4621578099838968) internal successors, (1529), 621 states have internal predecessors, (1529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:30,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 1529 transitions. [2022-03-01 17:53:30,096 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 1529 transitions. Word has length 24 [2022-03-01 17:53:30,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:30,096 INFO L470 AbstractCegarLoop]: Abstraction has 622 states and 1529 transitions. [2022-03-01 17:53:30,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 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) [2022-03-01 17:53:30,096 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 1529 transitions. [2022-03-01 17:53:30,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:53:30,097 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:30,098 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:30,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:30,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:30,320 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:53:30,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:30,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1352956133, now seen corresponding path program 24 times [2022-03-01 17:53:30,320 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:30,320 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443909268] [2022-03-01 17:53:30,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:30,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:30,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:30,389 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:53:30,389 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:30,390 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443909268] [2022-03-01 17:53:30,390 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443909268] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:30,390 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283643724] [2022-03-01 17:53:30,390 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:53:30,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:30,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:30,391 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:30,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-01 17:53:30,415 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:53:30,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:30,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:53:30,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:30,565 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:30,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:30,678 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:30,678 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283643724] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:30,678 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:30,678 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 19 [2022-03-01 17:53:30,678 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086211566] [2022-03-01 17:53:30,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:30,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:53:30,679 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:30,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:53:30,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:53:30,679 INFO L87 Difference]: Start difference. First operand 622 states and 1529 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) [2022-03-01 17:53:31,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:31,212 INFO L93 Difference]: Finished difference Result 871 states and 1982 transitions. [2022-03-01 17:53:31,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-01 17:53:31,213 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 [2022-03-01 17:53:31,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:31,215 INFO L225 Difference]: With dead ends: 871 [2022-03-01 17:53:31,215 INFO L226 Difference]: Without dead ends: 867 [2022-03-01 17:53:31,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=724, Invalid=1726, Unknown=0, NotChecked=0, Total=2450 [2022-03-01 17:53:31,217 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 245 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:31,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 67 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:53:31,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2022-03-01 17:53:31,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 622. [2022-03-01 17:53:31,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 621 states have (on average 2.4557165861513686) internal successors, (1525), 621 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:31,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 1525 transitions. [2022-03-01 17:53:31,230 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 1525 transitions. Word has length 24 [2022-03-01 17:53:31,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:31,230 INFO L470 AbstractCegarLoop]: Abstraction has 622 states and 1525 transitions. [2022-03-01 17:53:31,230 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) [2022-03-01 17:53:31,230 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 1525 transitions. [2022-03-01 17:53:31,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:53:31,231 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:31,231 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:31,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:31,454 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,SelfDestructingSolverStorable28 [2022-03-01 17:53:31,455 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:53:31,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:31,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1859302399, now seen corresponding path program 25 times [2022-03-01 17:53:31,455 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:31,455 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064417505] [2022-03-01 17:53:31,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:31,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:31,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:31,508 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:53:31,509 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:31,509 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064417505] [2022-03-01 17:53:31,509 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064417505] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:31,509 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120406685] [2022-03-01 17:53:31,509 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:53:31,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:31,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:31,510 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:31,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-01 17:53:31,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:31,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:53:31,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:31,679 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:31,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:31,802 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:31,802 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120406685] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:31,802 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:31,802 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-03-01 17:53:31,802 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183857320] [2022-03-01 17:53:31,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:31,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:53:31,803 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:31,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:53:31,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:53:31,804 INFO L87 Difference]: Start difference. First operand 622 states and 1525 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:32,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:32,313 INFO L93 Difference]: Finished difference Result 948 states and 2156 transitions. [2022-03-01 17:53:32,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-01 17:53:32,314 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:53:32,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:32,316 INFO L225 Difference]: With dead ends: 948 [2022-03-01 17:53:32,316 INFO L226 Difference]: Without dead ends: 936 [2022-03-01 17:53:32,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=657, Invalid=1599, Unknown=0, NotChecked=0, Total=2256 [2022-03-01 17:53:32,317 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 320 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:32,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 77 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:53:32,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2022-03-01 17:53:32,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 675. [2022-03-01 17:53:32,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 674 states have (on average 2.4614243323442135) internal successors, (1659), 674 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:32,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 1659 transitions. [2022-03-01 17:53:32,333 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 1659 transitions. Word has length 24 [2022-03-01 17:53:32,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:32,333 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 1659 transitions. [2022-03-01 17:53:32,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:32,333 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 1659 transitions. [2022-03-01 17:53:32,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:53:32,334 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:32,334 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:32,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-03-01 17:53:32,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:32,557 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:53:32,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:32,557 INFO L85 PathProgramCache]: Analyzing trace with hash -2086523779, now seen corresponding path program 26 times [2022-03-01 17:53:32,558 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:32,558 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246878038] [2022-03-01 17:53:32,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:32,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:32,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:32,617 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:32,617 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:32,617 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246878038] [2022-03-01 17:53:32,617 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246878038] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:32,617 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639309303] [2022-03-01 17:53:32,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:53:32,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:32,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:32,619 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:32,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-01 17:53:32,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:53:32,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:32,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:53:32,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:32,771 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:32,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:32,850 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:32,851 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639309303] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:32,851 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:32,851 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-03-01 17:53:32,851 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746020640] [2022-03-01 17:53:32,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:32,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:53:32,851 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:32,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:53:32,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:53:32,852 INFO L87 Difference]: Start difference. First operand 675 states and 1659 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:33,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:33,266 INFO L93 Difference]: Finished difference Result 948 states and 2180 transitions. [2022-03-01 17:53:33,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 17:53:33,266 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:53:33,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:33,269 INFO L225 Difference]: With dead ends: 948 [2022-03-01 17:53:33,269 INFO L226 Difference]: Without dead ends: 928 [2022-03-01 17:53:33,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=557, Invalid=1423, Unknown=0, NotChecked=0, Total=1980 [2022-03-01 17:53:33,270 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 239 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:33,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 81 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:53:33,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2022-03-01 17:53:33,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 699. [2022-03-01 17:53:33,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 698 states have (on average 2.4713467048710602) internal successors, (1725), 698 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:33,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 1725 transitions. [2022-03-01 17:53:33,284 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 1725 transitions. Word has length 24 [2022-03-01 17:53:33,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:33,284 INFO L470 AbstractCegarLoop]: Abstraction has 699 states and 1725 transitions. [2022-03-01 17:53:33,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:33,285 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 1725 transitions. [2022-03-01 17:53:33,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:53:33,286 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:33,286 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:33,308 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-03-01 17:53:33,507 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,SelfDestructingSolverStorable30 [2022-03-01 17:53:33,507 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:53:33,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:33,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1691341709, now seen corresponding path program 27 times [2022-03-01 17:53:33,508 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:33,508 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563434577] [2022-03-01 17:53:33,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:33,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:33,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:33,544 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:33,544 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:33,544 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563434577] [2022-03-01 17:53:33,544 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563434577] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:33,544 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041958057] [2022-03-01 17:53:33,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:53:33,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:33,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:33,546 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:33,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-01 17:53:33,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:53:33,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:33,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:53:33,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:33,632 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-03-01 17:53:33,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 41 [2022-03-01 17:53:33,945 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:33,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 53 [2022-03-01 17:53:33,958 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:33,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:34,050 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-03-01 17:53:34,052 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 52 [2022-03-01 17:53:34,065 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:34,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 56 [2022-03-01 17:53:34,092 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:34,093 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041958057] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:34,093 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:34,093 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 13 [2022-03-01 17:53:34,093 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521050282] [2022-03-01 17:53:34,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:34,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 17:53:34,093 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:34,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 17:53:34,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:53:34,094 INFO L87 Difference]: Start difference. First operand 699 states and 1725 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:34,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:34,154 INFO L93 Difference]: Finished difference Result 1093 states and 2595 transitions. [2022-03-01 17:53:34,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:53:34,155 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:53:34,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:34,158 INFO L225 Difference]: With dead ends: 1093 [2022-03-01 17:53:34,158 INFO L226 Difference]: Without dead ends: 1086 [2022-03-01 17:53:34,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:53:34,158 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 73 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:34,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 335 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 136 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2022-03-01 17:53:34,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2022-03-01 17:53:34,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 874. [2022-03-01 17:53:34,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 873 states have (on average 2.491408934707904) internal successors, (2175), 873 states have internal predecessors, (2175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:34,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 2175 transitions. [2022-03-01 17:53:34,173 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 2175 transitions. Word has length 26 [2022-03-01 17:53:34,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:34,173 INFO L470 AbstractCegarLoop]: Abstraction has 874 states and 2175 transitions. [2022-03-01 17:53:34,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:34,173 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 2175 transitions. [2022-03-01 17:53:34,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:53:34,175 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:34,175 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:34,193 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-03-01 17:53:34,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:34,383 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:53:34,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:34,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1092947383, now seen corresponding path program 28 times [2022-03-01 17:53:34,383 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:34,383 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705290781] [2022-03-01 17:53:34,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:34,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:34,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:34,428 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:34,428 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:34,428 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705290781] [2022-03-01 17:53:34,429 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705290781] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:34,429 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547737845] [2022-03-01 17:53:34,429 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:53:34,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:34,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:34,448 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:34,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-01 17:53:34,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:53:34,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:34,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:53:34,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:34,526 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-03-01 17:53:34,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 41 [2022-03-01 17:53:34,894 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:34,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 53 [2022-03-01 17:53:34,918 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:34,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:34,995 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-03-01 17:53:34,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 52 [2022-03-01 17:53:35,008 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:35,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 56 [2022-03-01 17:53:35,040 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:35,040 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547737845] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:35,040 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:35,040 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 13 [2022-03-01 17:53:35,040 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269110615] [2022-03-01 17:53:35,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:35,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 17:53:35,041 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:35,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 17:53:35,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:53:35,041 INFO L87 Difference]: Start difference. First operand 874 states and 2175 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:35,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:35,118 INFO L93 Difference]: Finished difference Result 1109 states and 2607 transitions. [2022-03-01 17:53:35,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:53:35,118 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:53:35,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:35,121 INFO L225 Difference]: With dead ends: 1109 [2022-03-01 17:53:35,122 INFO L226 Difference]: Without dead ends: 1106 [2022-03-01 17:53:35,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:53:35,122 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 90 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:35,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 352 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 148 Invalid, 0 Unknown, 81 Unchecked, 0.1s Time] [2022-03-01 17:53:35,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2022-03-01 17:53:35,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 910. [2022-03-01 17:53:35,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 910 states, 909 states have (on average 2.5115511551155114) internal successors, (2283), 909 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:35,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 2283 transitions. [2022-03-01 17:53:35,139 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 2283 transitions. Word has length 26 [2022-03-01 17:53:35,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:35,139 INFO L470 AbstractCegarLoop]: Abstraction has 910 states and 2283 transitions. [2022-03-01 17:53:35,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:35,139 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 2283 transitions. [2022-03-01 17:53:35,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:53:35,140 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:35,140 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:35,156 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-03-01 17:53:35,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:35,341 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:53:35,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:35,341 INFO L85 PathProgramCache]: Analyzing trace with hash 503132531, now seen corresponding path program 29 times [2022-03-01 17:53:35,341 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:35,341 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514923364] [2022-03-01 17:53:35,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:35,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:35,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:35,379 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:53:35,379 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:35,379 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514923364] [2022-03-01 17:53:35,380 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514923364] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:35,380 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114590168] [2022-03-01 17:53:35,380 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:53:35,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:35,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:35,381 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:35,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-01 17:53:35,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 17:53:35,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:35,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-01 17:53:35,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:35,540 INFO L353 Elim1Store]: treesize reduction 37, result has 44.8 percent of original size [2022-03-01 17:53:35,540 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 52 [2022-03-01 17:53:35,578 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:35,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 50 [2022-03-01 17:53:35,594 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:53:35,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:35,706 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-03-01 17:53:35,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 54 [2022-03-01 17:53:35,716 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:35,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 56 [2022-03-01 17:53:35,742 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:53:35,742 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114590168] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:35,742 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:35,742 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 15 [2022-03-01 17:53:35,743 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18554978] [2022-03-01 17:53:35,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:35,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:53:35,743 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:35,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:53:35,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:53:35,744 INFO L87 Difference]: Start difference. First operand 910 states and 2283 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:35,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:35,865 INFO L93 Difference]: Finished difference Result 1218 states and 2950 transitions. [2022-03-01 17:53:35,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 17:53:35,865 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:53:35,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:35,869 INFO L225 Difference]: With dead ends: 1218 [2022-03-01 17:53:35,870 INFO L226 Difference]: Without dead ends: 1202 [2022-03-01 17:53:35,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:53:35,870 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 92 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:35,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 312 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:53:35,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1202 states. [2022-03-01 17:53:35,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1202 to 1016. [2022-03-01 17:53:35,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1016 states, 1015 states have (on average 2.5448275862068965) internal successors, (2583), 1015 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:35,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 2583 transitions. [2022-03-01 17:53:35,890 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 2583 transitions. Word has length 26 [2022-03-01 17:53:35,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:35,890 INFO L470 AbstractCegarLoop]: Abstraction has 1016 states and 2583 transitions. [2022-03-01 17:53:35,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:35,891 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 2583 transitions. [2022-03-01 17:53:35,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:53:35,892 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:35,892 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:35,915 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-03-01 17:53:36,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:36,107 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:53:36,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:36,108 INFO L85 PathProgramCache]: Analyzing trace with hash 624563315, now seen corresponding path program 30 times [2022-03-01 17:53:36,120 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:36,121 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167307438] [2022-03-01 17:53:36,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:36,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:36,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:36,158 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:53:36,158 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:36,158 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167307438] [2022-03-01 17:53:36,158 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167307438] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:36,158 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594576768] [2022-03-01 17:53:36,159 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:53:36,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:36,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:36,160 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:36,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-01 17:53:36,192 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-01 17:53:36,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:36,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:53:36,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:36,317 INFO L353 Elim1Store]: treesize reduction 34, result has 38.2 percent of original size [2022-03-01 17:53:36,317 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 59 [2022-03-01 17:53:36,327 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:36,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 50 [2022-03-01 17:53:36,342 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:53:36,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:36,478 INFO L353 Elim1Store]: treesize reduction 60, result has 25.9 percent of original size [2022-03-01 17:53:36,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 72 treesize of output 76 [2022-03-01 17:53:36,494 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:36,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 56 [2022-03-01 17:53:36,528 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:53:36,528 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594576768] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:36,528 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:36,528 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2022-03-01 17:53:36,528 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868119990] [2022-03-01 17:53:36,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:36,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:53:36,529 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:36,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:53:36,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:53:36,529 INFO L87 Difference]: Start difference. First operand 1016 states and 2583 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:36,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:36,645 INFO L93 Difference]: Finished difference Result 1343 states and 3291 transitions. [2022-03-01 17:53:36,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:53:36,646 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:53:36,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:36,651 INFO L225 Difference]: With dead ends: 1343 [2022-03-01 17:53:36,651 INFO L226 Difference]: Without dead ends: 1325 [2022-03-01 17:53:36,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:53:36,652 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 133 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:36,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 295 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:53:36,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1325 states. [2022-03-01 17:53:36,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1325 to 1133. [2022-03-01 17:53:36,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1133 states, 1132 states have (on average 2.5680212014134276) internal successors, (2907), 1132 states have internal predecessors, (2907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:36,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1133 states to 1133 states and 2907 transitions. [2022-03-01 17:53:36,676 INFO L78 Accepts]: Start accepts. Automaton has 1133 states and 2907 transitions. Word has length 26 [2022-03-01 17:53:36,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:36,676 INFO L470 AbstractCegarLoop]: Abstraction has 1133 states and 2907 transitions. [2022-03-01 17:53:36,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:36,676 INFO L276 IsEmpty]: Start isEmpty. Operand 1133 states and 2907 transitions. [2022-03-01 17:53:36,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:53:36,677 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:36,677 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:36,693 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-03-01 17:53:36,878 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,SelfDestructingSolverStorable34 [2022-03-01 17:53:36,878 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:53:36,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:36,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1355429747, now seen corresponding path program 31 times [2022-03-01 17:53:36,879 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:36,879 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301668974] [2022-03-01 17:53:36,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:36,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:36,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:36,919 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:53:36,919 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:36,919 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301668974] [2022-03-01 17:53:36,919 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301668974] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:36,919 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153694163] [2022-03-01 17:53:36,919 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:53:36,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:36,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:36,921 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:36,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-01 17:53:36,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:36,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:53:36,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:37,009 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-03-01 17:53:37,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 41 [2022-03-01 17:53:37,271 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:37,271 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 53 [2022-03-01 17:53:37,292 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:53:37,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:37,398 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-03-01 17:53:37,398 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 52 [2022-03-01 17:53:37,407 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:37,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 56 [2022-03-01 17:53:37,432 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:53:37,432 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153694163] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:37,433 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:37,433 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 13 [2022-03-01 17:53:37,433 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263479629] [2022-03-01 17:53:37,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:37,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 17:53:37,433 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:37,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 17:53:37,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:53:37,434 INFO L87 Difference]: Start difference. First operand 1133 states and 2907 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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) [2022-03-01 17:53:37,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:37,496 INFO L93 Difference]: Finished difference Result 1549 states and 3837 transitions. [2022-03-01 17:53:37,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:53:37,496 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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 26 [2022-03-01 17:53:37,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:37,502 INFO L225 Difference]: With dead ends: 1549 [2022-03-01 17:53:37,502 INFO L226 Difference]: Without dead ends: 1542 [2022-03-01 17:53:37,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:53:37,502 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 80 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:37,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 383 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 148 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-03-01 17:53:37,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1542 states. [2022-03-01 17:53:37,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1542 to 1269. [2022-03-01 17:53:37,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1269 states, 1268 states have (on average 2.586750788643533) internal successors, (3280), 1268 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:37,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1269 states to 1269 states and 3280 transitions. [2022-03-01 17:53:37,528 INFO L78 Accepts]: Start accepts. Automaton has 1269 states and 3280 transitions. Word has length 26 [2022-03-01 17:53:37,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:37,528 INFO L470 AbstractCegarLoop]: Abstraction has 1269 states and 3280 transitions. [2022-03-01 17:53:37,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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) [2022-03-01 17:53:37,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1269 states and 3280 transitions. [2022-03-01 17:53:37,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 17:53:37,530 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:37,530 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:37,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:37,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-01 17:53:37,743 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:53:37,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:37,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1467504395, now seen corresponding path program 32 times [2022-03-01 17:53:37,744 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:37,744 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470221777] [2022-03-01 17:53:37,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:37,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:37,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:37,837 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:37,837 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:37,837 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470221777] [2022-03-01 17:53:37,837 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470221777] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:37,837 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117466580] [2022-03-01 17:53:37,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:53:37,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:37,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:37,839 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:37,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-01 17:53:37,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:53:37,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:37,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 17:53:37,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:38,037 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:38,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:38,157 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:38,157 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117466580] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:38,157 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:38,157 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 25 [2022-03-01 17:53:38,157 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513212292] [2022-03-01 17:53:38,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:38,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:53:38,158 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:38,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:53:38,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:53:38,158 INFO L87 Difference]: Start difference. First operand 1269 states and 3280 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 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) [2022-03-01 17:53:39,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:39,124 INFO L93 Difference]: Finished difference Result 1911 states and 4510 transitions. [2022-03-01 17:53:39,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-01 17:53:39,125 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 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 [2022-03-01 17:53:39,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:39,130 INFO L225 Difference]: With dead ends: 1911 [2022-03-01 17:53:39,130 INFO L226 Difference]: Without dead ends: 1911 [2022-03-01 17:53:39,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1246 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1238, Invalid=3592, Unknown=0, NotChecked=0, Total=4830 [2022-03-01 17:53:39,132 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 253 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:39,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 155 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:53:39,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1911 states. [2022-03-01 17:53:39,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1911 to 1120. [2022-03-01 17:53:39,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1119 states have (on average 2.558534405719392) internal successors, (2863), 1119 states have internal predecessors, (2863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:39,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 2863 transitions. [2022-03-01 17:53:39,156 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 2863 transitions. Word has length 28 [2022-03-01 17:53:39,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:39,156 INFO L470 AbstractCegarLoop]: Abstraction has 1120 states and 2863 transitions. [2022-03-01 17:53:39,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 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) [2022-03-01 17:53:39,156 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 2863 transitions. [2022-03-01 17:53:39,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 17:53:39,158 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:39,158 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:39,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:39,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:39,371 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:53:39,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:39,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1490403633, now seen corresponding path program 33 times [2022-03-01 17:53:39,372 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:39,372 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897870931] [2022-03-01 17:53:39,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:39,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:39,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:39,455 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:39,455 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:39,456 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897870931] [2022-03-01 17:53:39,456 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897870931] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:39,456 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309049246] [2022-03-01 17:53:39,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:53:39,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:39,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:39,457 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:39,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-01 17:53:39,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-01 17:53:39,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:39,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 17:53:39,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:39,694 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:39,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:39,806 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:39,806 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309049246] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:39,806 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:39,806 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-01 17:53:39,806 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897724871] [2022-03-01 17:53:39,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:39,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:53:39,807 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:39,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:53:39,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:53:39,807 INFO L87 Difference]: Start difference. First operand 1120 states and 2863 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 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) [2022-03-01 17:53:40,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:40,743 INFO L93 Difference]: Finished difference Result 2104 states and 4847 transitions. [2022-03-01 17:53:40,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-01 17:53:40,743 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 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 28 [2022-03-01 17:53:40,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:40,749 INFO L225 Difference]: With dead ends: 2104 [2022-03-01 17:53:40,750 INFO L226 Difference]: Without dead ends: 2033 [2022-03-01 17:53:40,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1174, Invalid=3382, Unknown=0, NotChecked=0, Total=4556 [2022-03-01 17:53:40,751 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 383 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:40,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 176 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:53:40,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2033 states. [2022-03-01 17:53:40,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2033 to 1184. [2022-03-01 17:53:40,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 1183 states have (on average 2.5393068469991547) internal successors, (3004), 1183 states have internal predecessors, (3004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:40,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 3004 transitions. [2022-03-01 17:53:40,774 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 3004 transitions. Word has length 28 [2022-03-01 17:53:40,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:40,774 INFO L470 AbstractCegarLoop]: Abstraction has 1184 states and 3004 transitions. [2022-03-01 17:53:40,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 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) [2022-03-01 17:53:40,775 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 3004 transitions. [2022-03-01 17:53:40,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 17:53:40,777 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:40,777 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:40,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:40,999 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,SelfDestructingSolverStorable37 [2022-03-01 17:53:40,999 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:53:40,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:40,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1110861687, now seen corresponding path program 34 times [2022-03-01 17:53:40,999 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:41,000 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477066339] [2022-03-01 17:53:41,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:41,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:41,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:41,074 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:41,075 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:41,075 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477066339] [2022-03-01 17:53:41,075 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477066339] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:41,075 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462642466] [2022-03-01 17:53:41,075 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:53:41,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:41,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:41,076 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:41,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-01 17:53:41,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:53:41,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:41,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 17:53:41,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:41,271 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:41,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:41,440 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:41,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462642466] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:41,440 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:41,440 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 25 [2022-03-01 17:53:41,440 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656083792] [2022-03-01 17:53:41,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:41,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:53:41,440 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:41,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:53:41,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:53:41,441 INFO L87 Difference]: Start difference. First operand 1184 states and 3004 transitions. Second operand has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:42,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:42,589 INFO L93 Difference]: Finished difference Result 2469 states and 5839 transitions. [2022-03-01 17:53:42,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-01 17:53:42,589 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 17:53:42,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:42,593 INFO L225 Difference]: With dead ends: 2469 [2022-03-01 17:53:42,593 INFO L226 Difference]: Without dead ends: 2461 [2022-03-01 17:53:42,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2426 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1964, Invalid=5008, Unknown=0, NotChecked=0, Total=6972 [2022-03-01 17:53:42,595 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 396 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:42,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 212 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:53:42,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2461 states. [2022-03-01 17:53:42,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2461 to 1466. [2022-03-01 17:53:42,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1466 states, 1465 states have (on average 2.5419795221843002) internal successors, (3724), 1465 states have internal predecessors, (3724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:42,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1466 states to 1466 states and 3724 transitions. [2022-03-01 17:53:42,622 INFO L78 Accepts]: Start accepts. Automaton has 1466 states and 3724 transitions. Word has length 28 [2022-03-01 17:53:42,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:42,623 INFO L470 AbstractCegarLoop]: Abstraction has 1466 states and 3724 transitions. [2022-03-01 17:53:42,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:42,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1466 states and 3724 transitions. [2022-03-01 17:53:42,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 17:53:42,625 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:42,625 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:42,644 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-03-01 17:53:42,825 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,SelfDestructingSolverStorable38 [2022-03-01 17:53:42,825 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:53:42,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:42,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1800207527, now seen corresponding path program 35 times [2022-03-01 17:53:42,826 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:42,826 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534898522] [2022-03-01 17:53:42,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:42,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:42,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:42,886 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:42,886 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:42,893 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534898522] [2022-03-01 17:53:42,893 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534898522] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:42,893 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257473466] [2022-03-01 17:53:42,893 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:53:42,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:42,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:42,894 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:42,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-01 17:53:42,917 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-01 17:53:42,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:42,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 17:53:42,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:43,092 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:43,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:43,227 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:43,228 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257473466] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:43,228 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:43,228 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 24 [2022-03-01 17:53:43,228 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926874060] [2022-03-01 17:53:43,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:43,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:53:43,228 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:43,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:53:43,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:53:43,229 INFO L87 Difference]: Start difference. First operand 1466 states and 3724 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) [2022-03-01 17:53:43,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:43,845 INFO L93 Difference]: Finished difference Result 1722 states and 4208 transitions. [2022-03-01 17:53:43,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-01 17:53:43,846 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 [2022-03-01 17:53:43,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:43,849 INFO L225 Difference]: With dead ends: 1722 [2022-03-01 17:53:43,849 INFO L226 Difference]: Without dead ends: 1718 [2022-03-01 17:53:43,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=981, Invalid=2441, Unknown=0, NotChecked=0, Total=3422 [2022-03-01 17:53:43,850 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 197 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:43,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 74 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:53:43,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1718 states. [2022-03-01 17:53:43,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1718 to 1466. [2022-03-01 17:53:43,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1466 states, 1465 states have (on average 2.5406143344709897) internal successors, (3722), 1465 states have internal predecessors, (3722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:43,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1466 states to 1466 states and 3722 transitions. [2022-03-01 17:53:43,874 INFO L78 Accepts]: Start accepts. Automaton has 1466 states and 3722 transitions. Word has length 28 [2022-03-01 17:53:43,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:43,874 INFO L470 AbstractCegarLoop]: Abstraction has 1466 states and 3722 transitions. [2022-03-01 17:53:43,874 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) [2022-03-01 17:53:43,874 INFO L276 IsEmpty]: Start isEmpty. Operand 1466 states and 3722 transitions. [2022-03-01 17:53:43,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 17:53:43,876 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:43,876 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:43,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:44,091 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,SelfDestructingSolverStorable39 [2022-03-01 17:53:44,091 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:53:44,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:44,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1551205937, now seen corresponding path program 36 times [2022-03-01 17:53:44,092 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:44,092 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049610538] [2022-03-01 17:53:44,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:44,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:44,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:44,157 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:53:44,158 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:44,158 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049610538] [2022-03-01 17:53:44,158 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049610538] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:44,158 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344528866] [2022-03-01 17:53:44,158 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:53:44,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:44,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:44,159 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:44,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-01 17:53:44,188 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-01 17:53:44,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:44,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 17:53:44,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:44,376 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:44,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:44,536 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:44,536 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344528866] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:44,536 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:44,536 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 24 [2022-03-01 17:53:44,536 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258576655] [2022-03-01 17:53:44,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:44,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:53:44,537 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:44,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:53:44,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:53:44,537 INFO L87 Difference]: Start difference. First operand 1466 states and 3722 transitions. Second operand has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:45,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:45,187 INFO L93 Difference]: Finished difference Result 2072 states and 5046 transitions. [2022-03-01 17:53:45,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-01 17:53:45,188 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:53:45,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:45,191 INFO L225 Difference]: With dead ends: 2072 [2022-03-01 17:53:45,192 INFO L226 Difference]: Without dead ends: 2057 [2022-03-01 17:53:45,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=882, Invalid=2310, Unknown=0, NotChecked=0, Total=3192 [2022-03-01 17:53:45,193 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 299 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:45,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 106 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:53:45,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2057 states. [2022-03-01 17:53:45,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2057 to 1512. [2022-03-01 17:53:45,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1511 states have (on average 2.545996029119788) internal successors, (3847), 1511 states have internal predecessors, (3847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:45,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 3847 transitions. [2022-03-01 17:53:45,219 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 3847 transitions. Word has length 28 [2022-03-01 17:53:45,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:45,219 INFO L470 AbstractCegarLoop]: Abstraction has 1512 states and 3847 transitions. [2022-03-01 17:53:45,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:45,219 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 3847 transitions. [2022-03-01 17:53:45,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 17:53:45,221 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:45,221 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:45,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:45,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:45,424 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:53:45,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:45,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1603966271, now seen corresponding path program 37 times [2022-03-01 17:53:45,425 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:45,425 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695581453] [2022-03-01 17:53:45,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:45,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:45,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:45,488 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:45,488 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:45,488 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695581453] [2022-03-01 17:53:45,489 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695581453] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:45,489 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538333601] [2022-03-01 17:53:45,489 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:53:45,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:45,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:45,490 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:45,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-01 17:53:45,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:45,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 17:53:45,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:45,701 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:45,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:45,845 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:45,845 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538333601] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:45,845 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:45,845 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 24 [2022-03-01 17:53:45,846 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438194399] [2022-03-01 17:53:45,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:45,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:53:45,846 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:45,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:53:45,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:53:45,847 INFO L87 Difference]: Start difference. First operand 1512 states and 3847 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:46,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:46,511 INFO L93 Difference]: Finished difference Result 2028 states and 4871 transitions. [2022-03-01 17:53:46,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-01 17:53:46,511 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 24 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 [2022-03-01 17:53:46,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:46,516 INFO L225 Difference]: With dead ends: 2028 [2022-03-01 17:53:46,516 INFO L226 Difference]: Without dead ends: 2014 [2022-03-01 17:53:46,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=986, Invalid=2554, Unknown=0, NotChecked=0, Total=3540 [2022-03-01 17:53:46,517 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 290 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:46,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 112 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:53:46,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2014 states. [2022-03-01 17:53:46,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2014 to 1522. [2022-03-01 17:53:46,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1522 states, 1521 states have (on average 2.544378698224852) internal successors, (3870), 1521 states have internal predecessors, (3870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:46,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1522 states to 1522 states and 3870 transitions. [2022-03-01 17:53:46,545 INFO L78 Accepts]: Start accepts. Automaton has 1522 states and 3870 transitions. Word has length 28 [2022-03-01 17:53:46,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:46,545 INFO L470 AbstractCegarLoop]: Abstraction has 1522 states and 3870 transitions. [2022-03-01 17:53:46,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:46,546 INFO L276 IsEmpty]: Start isEmpty. Operand 1522 states and 3870 transitions. [2022-03-01 17:53:46,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 17:53:46,548 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:46,548 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:46,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:46,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:46,758 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:53:46,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:46,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1100321219, now seen corresponding path program 38 times [2022-03-01 17:53:46,758 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:46,758 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980812086] [2022-03-01 17:53:46,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:46,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:46,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:46,830 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:46,830 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:46,830 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980812086] [2022-03-01 17:53:46,830 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980812086] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:46,830 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617191328] [2022-03-01 17:53:46,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:53:46,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:46,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:46,831 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:46,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-01 17:53:46,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:53:46,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:46,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 17:53:46,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:47,034 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:47,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:47,151 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:47,151 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617191328] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:47,151 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:47,151 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 24 [2022-03-01 17:53:47,151 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728491063] [2022-03-01 17:53:47,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:47,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:53:47,152 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:47,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:53:47,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=446, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:53:47,152 INFO L87 Difference]: Start difference. First operand 1522 states and 3870 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:47,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:47,794 INFO L93 Difference]: Finished difference Result 2204 states and 5233 transitions. [2022-03-01 17:53:47,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-01 17:53:47,795 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 17:53:47,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:47,800 INFO L225 Difference]: With dead ends: 2204 [2022-03-01 17:53:47,800 INFO L226 Difference]: Without dead ends: 2178 [2022-03-01 17:53:47,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1055 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=999, Invalid=2661, Unknown=0, NotChecked=0, Total=3660 [2022-03-01 17:53:47,801 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 315 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:47,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 90 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:53:47,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2178 states. [2022-03-01 17:53:47,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2178 to 1393. [2022-03-01 17:53:47,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1393 states, 1392 states have (on average 2.5229885057471266) internal successors, (3512), 1392 states have internal predecessors, (3512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:47,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1393 states to 1393 states and 3512 transitions. [2022-03-01 17:53:47,830 INFO L78 Accepts]: Start accepts. Automaton has 1393 states and 3512 transitions. Word has length 28 [2022-03-01 17:53:47,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:47,831 INFO L470 AbstractCegarLoop]: Abstraction has 1393 states and 3512 transitions. [2022-03-01 17:53:47,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:47,831 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states and 3512 transitions. [2022-03-01 17:53:47,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 17:53:47,833 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:47,833 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:47,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:48,047 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,SelfDestructingSolverStorable42 [2022-03-01 17:53:48,047 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:53:48,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:48,048 INFO L85 PathProgramCache]: Analyzing trace with hash 794141429, now seen corresponding path program 39 times [2022-03-01 17:53:48,048 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:48,048 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956274234] [2022-03-01 17:53:48,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:48,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:48,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:48,125 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:53:48,125 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:48,125 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956274234] [2022-03-01 17:53:48,125 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956274234] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:48,125 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111538141] [2022-03-01 17:53:48,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:53:48,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:48,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:48,126 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:48,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-01 17:53:48,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-01 17:53:48,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:48,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 17:53:48,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:48,354 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:48,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:48,478 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:48,479 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111538141] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:48,479 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:48,479 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:53:48,479 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061595939] [2022-03-01 17:53:48,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:48,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:53:48,479 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:48,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:53:48,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:53:48,480 INFO L87 Difference]: Start difference. First operand 1393 states and 3512 transitions. Second operand has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:49,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:49,435 INFO L93 Difference]: Finished difference Result 2358 states and 5365 transitions. [2022-03-01 17:53:49,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-01 17:53:49,437 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 17:53:49,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:49,440 INFO L225 Difference]: With dead ends: 2358 [2022-03-01 17:53:49,440 INFO L226 Difference]: Without dead ends: 2358 [2022-03-01 17:53:49,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1621 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1414, Invalid=3842, Unknown=0, NotChecked=0, Total=5256 [2022-03-01 17:53:49,441 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 340 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:49,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 234 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:53:49,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2358 states. [2022-03-01 17:53:49,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2358 to 1209. [2022-03-01 17:53:49,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1209 states, 1208 states have (on average 2.4950331125827816) internal successors, (3014), 1208 states have internal predecessors, (3014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:49,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1209 states to 1209 states and 3014 transitions. [2022-03-01 17:53:49,479 INFO L78 Accepts]: Start accepts. Automaton has 1209 states and 3014 transitions. Word has length 28 [2022-03-01 17:53:49,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:49,479 INFO L470 AbstractCegarLoop]: Abstraction has 1209 states and 3014 transitions. [2022-03-01 17:53:49,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:49,479 INFO L276 IsEmpty]: Start isEmpty. Operand 1209 states and 3014 transitions. [2022-03-01 17:53:49,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 17:53:49,481 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:49,481 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:49,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:49,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-03-01 17:53:49,695 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:53:49,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:49,696 INFO L85 PathProgramCache]: Analyzing trace with hash 797219377, now seen corresponding path program 40 times [2022-03-01 17:53:49,696 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:49,696 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626440600] [2022-03-01 17:53:49,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:49,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:49,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:49,763 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:53:49,763 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:49,763 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626440600] [2022-03-01 17:53:49,763 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626440600] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:49,763 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967061090] [2022-03-01 17:53:49,764 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:53:49,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:49,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:49,765 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:49,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-01 17:53:49,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:53:49,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:49,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 17:53:49,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:49,967 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:49,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:50,094 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:50,095 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967061090] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:50,095 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:50,095 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 24 [2022-03-01 17:53:50,095 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871479777] [2022-03-01 17:53:50,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:50,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:53:50,095 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:50,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:53:50,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:53:50,096 INFO L87 Difference]: Start difference. First operand 1209 states and 3014 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:50,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:50,735 INFO L93 Difference]: Finished difference Result 1614 states and 3748 transitions. [2022-03-01 17:53:50,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-01 17:53:50,735 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 17:53:50,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:50,737 INFO L225 Difference]: With dead ends: 1614 [2022-03-01 17:53:50,737 INFO L226 Difference]: Without dead ends: 1575 [2022-03-01 17:53:50,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 917 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=820, Invalid=2372, Unknown=0, NotChecked=0, Total=3192 [2022-03-01 17:53:50,738 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 264 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:50,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 152 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:53:50,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1575 states. [2022-03-01 17:53:50,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1575 to 1116. [2022-03-01 17:53:50,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1116 states, 1115 states have (on average 2.4699551569506726) internal successors, (2754), 1115 states have internal predecessors, (2754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:50,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1116 states to 1116 states and 2754 transitions. [2022-03-01 17:53:50,758 INFO L78 Accepts]: Start accepts. Automaton has 1116 states and 2754 transitions. Word has length 28 [2022-03-01 17:53:50,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:50,758 INFO L470 AbstractCegarLoop]: Abstraction has 1116 states and 2754 transitions. [2022-03-01 17:53:50,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:50,758 INFO L276 IsEmpty]: Start isEmpty. Operand 1116 states and 2754 transitions. [2022-03-01 17:53:50,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 17:53:50,760 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:50,760 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:50,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:50,978 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,SelfDestructingSolverStorable44 [2022-03-01 17:53:50,978 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:53:50,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:50,978 INFO L85 PathProgramCache]: Analyzing trace with hash 626662645, now seen corresponding path program 41 times [2022-03-01 17:53:50,979 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:50,984 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774090563] [2022-03-01 17:53:50,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:50,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:50,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:51,056 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:53:51,056 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:51,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774090563] [2022-03-01 17:53:51,057 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774090563] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:51,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535966982] [2022-03-01 17:53:51,057 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:53:51,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:51,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:51,058 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:51,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-01 17:53:51,079 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 17:53:51,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:51,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 17:53:51,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:51,263 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:51,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:51,399 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:51,400 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535966982] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:51,400 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:51,400 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 25 [2022-03-01 17:53:51,400 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121242308] [2022-03-01 17:53:51,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:51,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:53:51,400 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:51,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:53:51,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:53:51,401 INFO L87 Difference]: Start difference. First operand 1116 states and 2754 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:52,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:52,496 INFO L93 Difference]: Finished difference Result 2277 states and 5143 transitions. [2022-03-01 17:53:52,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-01 17:53:52,496 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 17:53:52,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:52,500 INFO L225 Difference]: With dead ends: 2277 [2022-03-01 17:53:52,500 INFO L226 Difference]: Without dead ends: 2277 [2022-03-01 17:53:52,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2340 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1855, Invalid=4625, Unknown=0, NotChecked=0, Total=6480 [2022-03-01 17:53:52,500 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 386 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:52,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 236 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:53:52,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2277 states. [2022-03-01 17:53:52,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2277 to 1233. [2022-03-01 17:53:52,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 1232 states have (on average 2.4415584415584415) internal successors, (3008), 1232 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:52,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 3008 transitions. [2022-03-01 17:53:52,519 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 3008 transitions. Word has length 28 [2022-03-01 17:53:52,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:52,519 INFO L470 AbstractCegarLoop]: Abstraction has 1233 states and 3008 transitions. [2022-03-01 17:53:52,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:52,519 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 3008 transitions. [2022-03-01 17:53:52,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 17:53:52,521 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:52,521 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:52,536 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-03-01 17:53:52,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-03-01 17:53:52,721 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:53:52,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:52,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1712698161, now seen corresponding path program 42 times [2022-03-01 17:53:52,722 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:52,722 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981814695] [2022-03-01 17:53:52,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:52,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:52,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:52,797 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:53:52,797 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:52,797 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981814695] [2022-03-01 17:53:52,797 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981814695] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:52,797 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510688911] [2022-03-01 17:53:52,797 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:53:52,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:52,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:52,799 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:52,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-01 17:53:52,825 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:53:52,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:52,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 17:53:52,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:53,043 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:53,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:53,185 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:53,186 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510688911] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:53,186 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:53,186 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 24 [2022-03-01 17:53:53,186 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322047537] [2022-03-01 17:53:53,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:53,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:53:53,186 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:53,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:53:53,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=446, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:53:53,187 INFO L87 Difference]: Start difference. First operand 1233 states and 3008 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:53,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:53,795 INFO L93 Difference]: Finished difference Result 1568 states and 3646 transitions. [2022-03-01 17:53:53,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-01 17:53:53,795 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 24 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 [2022-03-01 17:53:53,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:53,797 INFO L225 Difference]: With dead ends: 1568 [2022-03-01 17:53:53,797 INFO L226 Difference]: Without dead ends: 1550 [2022-03-01 17:53:53,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 808 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=758, Invalid=2104, Unknown=0, NotChecked=0, Total=2862 [2022-03-01 17:53:53,798 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 217 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:53,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 177 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:53:53,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1550 states. [2022-03-01 17:53:53,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1550 to 1261. [2022-03-01 17:53:53,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1261 states, 1260 states have (on average 2.447619047619048) internal successors, (3084), 1260 states have internal predecessors, (3084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:53,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 3084 transitions. [2022-03-01 17:53:53,812 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 3084 transitions. Word has length 28 [2022-03-01 17:53:53,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:53,812 INFO L470 AbstractCegarLoop]: Abstraction has 1261 states and 3084 transitions. [2022-03-01 17:53:53,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:53,812 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 3084 transitions. [2022-03-01 17:53:53,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 17:53:53,813 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:53,813 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:53,829 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-03-01 17:53:54,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:54,014 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:53:54,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:54,014 INFO L85 PathProgramCache]: Analyzing trace with hash -432728331, now seen corresponding path program 43 times [2022-03-01 17:53:54,014 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:54,014 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596470017] [2022-03-01 17:53:54,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:54,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:54,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:54,090 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:53:54,091 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:54,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596470017] [2022-03-01 17:53:54,091 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596470017] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:54,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586100411] [2022-03-01 17:53:54,091 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:53:54,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:54,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:54,092 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:54,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-01 17:53:54,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:54,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 17:53:54,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:54,306 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:54,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:54,495 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:54,496 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586100411] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:54,496 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:54,496 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 25 [2022-03-01 17:53:54,496 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636427102] [2022-03-01 17:53:54,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:54,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:53:54,496 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:54,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:53:54,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=497, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:53:54,497 INFO L87 Difference]: Start difference. First operand 1261 states and 3084 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:55,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:55,811 INFO L93 Difference]: Finished difference Result 2739 states and 6352 transitions. [2022-03-01 17:53:55,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-01 17:53:55,811 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:53:55,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:55,815 INFO L225 Difference]: With dead ends: 2739 [2022-03-01 17:53:55,815 INFO L226 Difference]: Without dead ends: 2739 [2022-03-01 17:53:55,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3408 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2555, Invalid=6187, Unknown=0, NotChecked=0, Total=8742 [2022-03-01 17:53:55,816 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 471 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:55,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [471 Valid, 206 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:53:55,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2739 states. [2022-03-01 17:53:55,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2739 to 1923. [2022-03-01 17:53:55,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1923 states, 1922 states have (on average 2.5057232049947973) internal successors, (4816), 1922 states have internal predecessors, (4816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:55,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1923 states to 1923 states and 4816 transitions. [2022-03-01 17:53:55,849 INFO L78 Accepts]: Start accepts. Automaton has 1923 states and 4816 transitions. Word has length 28 [2022-03-01 17:53:55,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:55,849 INFO L470 AbstractCegarLoop]: Abstraction has 1923 states and 4816 transitions. [2022-03-01 17:53:55,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:55,850 INFO L276 IsEmpty]: Start isEmpty. Operand 1923 states and 4816 transitions. [2022-03-01 17:53:55,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 17:53:55,852 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:55,852 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:55,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:56,052 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,SelfDestructingSolverStorable47 [2022-03-01 17:53:56,052 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:53:56,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:56,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1916218331, now seen corresponding path program 44 times [2022-03-01 17:53:56,053 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:56,053 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735191608] [2022-03-01 17:53:56,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:56,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:56,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:56,121 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:53:56,122 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:56,122 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735191608] [2022-03-01 17:53:56,122 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735191608] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:56,122 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177717490] [2022-03-01 17:53:56,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:53:56,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:56,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:56,123 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:56,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-01 17:53:56,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:53:56,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:56,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 17:53:56,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:56,326 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:56,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:56,475 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:56,475 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177717490] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:56,475 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:56,475 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 24 [2022-03-01 17:53:56,475 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550725837] [2022-03-01 17:53:56,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:56,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:53:56,475 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:56,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:53:56,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:53:56,476 INFO L87 Difference]: Start difference. First operand 1923 states and 4816 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) [2022-03-01 17:53:57,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:57,341 INFO L93 Difference]: Finished difference Result 2431 states and 5779 transitions. [2022-03-01 17:53:57,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-01 17:53:57,342 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 [2022-03-01 17:53:57,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:57,344 INFO L225 Difference]: With dead ends: 2431 [2022-03-01 17:53:57,344 INFO L226 Difference]: Without dead ends: 2427 [2022-03-01 17:53:57,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1505 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1432, Invalid=3538, Unknown=0, NotChecked=0, Total=4970 [2022-03-01 17:53:57,348 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 320 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:57,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 93 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:53:57,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2427 states. [2022-03-01 17:53:57,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2427 to 1897. [2022-03-01 17:53:57,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1897 states, 1896 states have (on average 2.50210970464135) internal successors, (4744), 1896 states have internal predecessors, (4744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:57,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1897 states to 1897 states and 4744 transitions. [2022-03-01 17:53:57,391 INFO L78 Accepts]: Start accepts. Automaton has 1897 states and 4744 transitions. Word has length 28 [2022-03-01 17:53:57,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:57,391 INFO L470 AbstractCegarLoop]: Abstraction has 1897 states and 4744 transitions. [2022-03-01 17:53:57,391 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) [2022-03-01 17:53:57,391 INFO L276 IsEmpty]: Start isEmpty. Operand 1897 states and 4744 transitions. [2022-03-01 17:53:57,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 17:53:57,394 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:57,394 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:57,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:57,607 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,SelfDestructingSolverStorable48 [2022-03-01 17:53:57,607 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:53:57,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:57,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1409872065, now seen corresponding path program 45 times [2022-03-01 17:53:57,608 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:57,608 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089713394] [2022-03-01 17:53:57,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:57,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:57,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:57,672 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:53:57,673 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:57,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089713394] [2022-03-01 17:53:57,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089713394] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:57,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234409299] [2022-03-01 17:53:57,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:53:57,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:57,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:57,674 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:57,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-01 17:53:57,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-01 17:53:57,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:57,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 17:53:57,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:57,905 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:57,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:58,053 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:58,053 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234409299] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:58,053 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:58,053 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 24 [2022-03-01 17:53:58,053 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134135733] [2022-03-01 17:53:58,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:58,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:53:58,053 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:58,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:53:58,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=449, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:53:58,054 INFO L87 Difference]: Start difference. First operand 1897 states and 4744 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:58,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:58,849 INFO L93 Difference]: Finished difference Result 2590 states and 6161 transitions. [2022-03-01 17:53:58,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-01 17:53:58,849 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 24 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 [2022-03-01 17:53:58,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:58,860 INFO L225 Difference]: With dead ends: 2590 [2022-03-01 17:53:58,861 INFO L226 Difference]: Without dead ends: 2578 [2022-03-01 17:53:58,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1299 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1250, Invalid=3172, Unknown=0, NotChecked=0, Total=4422 [2022-03-01 17:53:58,861 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 362 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:58,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 105 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:53:58,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2578 states. [2022-03-01 17:53:58,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2578 to 2046. [2022-03-01 17:53:58,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2046 states, 2045 states have (on average 2.5114914425427872) internal successors, (5136), 2045 states have internal predecessors, (5136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:58,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2046 states to 2046 states and 5136 transitions. [2022-03-01 17:53:58,886 INFO L78 Accepts]: Start accepts. Automaton has 2046 states and 5136 transitions. Word has length 28 [2022-03-01 17:53:58,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:58,886 INFO L470 AbstractCegarLoop]: Abstraction has 2046 states and 5136 transitions. [2022-03-01 17:53:58,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:58,887 INFO L276 IsEmpty]: Start isEmpty. Operand 2046 states and 5136 transitions. [2022-03-01 17:53:58,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 17:53:58,889 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:58,889 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:53:58,904 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-03-01 17:53:59,089 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,SelfDestructingSolverStorable49 [2022-03-01 17:53:59,089 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:53:59,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:59,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1182650685, now seen corresponding path program 46 times [2022-03-01 17:53:59,090 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:59,090 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771310240] [2022-03-01 17:53:59,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:59,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:59,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:59,168 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:53:59,168 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:59,169 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771310240] [2022-03-01 17:53:59,169 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771310240] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:59,169 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832990925] [2022-03-01 17:53:59,169 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:53:59,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:59,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:59,170 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:59,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-01 17:53:59,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:53:59,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:59,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 17:53:59,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:59,362 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:59,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:59,481 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:59,481 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832990925] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:59,481 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:59,481 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 24 [2022-03-01 17:53:59,481 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265728955] [2022-03-01 17:53:59,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:59,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:53:59,481 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:59,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:53:59,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=449, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:53:59,482 INFO L87 Difference]: Start difference. First operand 2046 states and 5136 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:00,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:00,245 INFO L93 Difference]: Finished difference Result 2893 states and 6860 transitions. [2022-03-01 17:54:00,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-01 17:54:00,245 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 17:54:00,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:00,248 INFO L225 Difference]: With dead ends: 2893 [2022-03-01 17:54:00,248 INFO L226 Difference]: Without dead ends: 2873 [2022-03-01 17:54:00,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1254 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1194, Invalid=3096, Unknown=0, NotChecked=0, Total=4290 [2022-03-01 17:54:00,249 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 417 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:00,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 97 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:54:00,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2873 states. [2022-03-01 17:54:00,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2873 to 2276. [2022-03-01 17:54:00,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2276 states, 2275 states have (on average 2.514725274725275) internal successors, (5721), 2275 states have internal predecessors, (5721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:00,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2276 states to 2276 states and 5721 transitions. [2022-03-01 17:54:00,295 INFO L78 Accepts]: Start accepts. Automaton has 2276 states and 5721 transitions. Word has length 28 [2022-03-01 17:54:00,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:00,296 INFO L470 AbstractCegarLoop]: Abstraction has 2276 states and 5721 transitions. [2022-03-01 17:54:00,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:00,296 INFO L276 IsEmpty]: Start isEmpty. Operand 2276 states and 5721 transitions. [2022-03-01 17:54:00,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-01 17:54:00,299 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:00,299 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:00,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-01 17:54:00,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:00,511 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:54:00,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:00,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1866236601, now seen corresponding path program 47 times [2022-03-01 17:54:00,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:00,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15076552] [2022-03-01 17:54:00,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:00,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:00,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:00,583 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:00,583 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:00,583 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15076552] [2022-03-01 17:54:00,583 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15076552] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:00,583 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419534207] [2022-03-01 17:54:00,583 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:54:00,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:00,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:00,584 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:00,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-01 17:54:00,607 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 17:54:00,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:00,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 17:54:00,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:00,780 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:00,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:00,882 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:00,883 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419534207] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:00,883 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:00,883 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-01 17:54:00,883 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423546145] [2022-03-01 17:54:00,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:00,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:54:00,883 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:00,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:54:00,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:54:00,884 INFO L87 Difference]: Start difference. First operand 2276 states and 5721 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:01,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:01,548 INFO L93 Difference]: Finished difference Result 2881 states and 6916 transitions. [2022-03-01 17:54:01,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-01 17:54:01,548 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-01 17:54:01,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:01,552 INFO L225 Difference]: With dead ends: 2881 [2022-03-01 17:54:01,552 INFO L226 Difference]: Without dead ends: 2853 [2022-03-01 17:54:01,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1103 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1020, Invalid=2762, Unknown=0, NotChecked=0, Total=3782 [2022-03-01 17:54:01,552 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 365 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:01,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 104 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:54:01,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2853 states. [2022-03-01 17:54:01,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2853 to 2329. [2022-03-01 17:54:01,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2329 states, 2328 states have (on average 2.527061855670103) internal successors, (5883), 2328 states have internal predecessors, (5883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:01,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2329 states to 2329 states and 5883 transitions. [2022-03-01 17:54:01,583 INFO L78 Accepts]: Start accepts. Automaton has 2329 states and 5883 transitions. Word has length 28 [2022-03-01 17:54:01,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:01,583 INFO L470 AbstractCegarLoop]: Abstraction has 2329 states and 5883 transitions. [2022-03-01 17:54:01,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:01,583 INFO L276 IsEmpty]: Start isEmpty. Operand 2329 states and 5883 transitions. [2022-03-01 17:54:01,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:54:01,585 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:01,585 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:01,601 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-03-01 17:54:01,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:01,786 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:54:01,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:01,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1849697587, now seen corresponding path program 48 times [2022-03-01 17:54:01,786 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:01,786 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390356462] [2022-03-01 17:54:01,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:01,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:01,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:01,822 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:01,822 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:01,822 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390356462] [2022-03-01 17:54:01,822 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390356462] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:01,822 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447768427] [2022-03-01 17:54:01,822 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:54:01,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:01,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:01,823 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:01,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-01 17:54:01,847 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-01 17:54:01,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:01,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:54:01,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:02,106 INFO L353 Elim1Store]: treesize reduction 216, result has 25.3 percent of original size [2022-03-01 17:54:02,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 107 treesize of output 114 [2022-03-01 17:54:02,118 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:02,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:02,360 INFO L353 Elim1Store]: treesize reduction 48, result has 40.7 percent of original size [2022-03-01 17:54:02,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 112 treesize of output 102 [2022-03-01 17:54:02,388 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:02,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 104 treesize of output 100 [2022-03-01 17:54:02,445 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:02,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447768427] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:02,446 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:02,446 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 21 [2022-03-01 17:54:02,446 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323642276] [2022-03-01 17:54:02,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:02,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:54:02,446 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:02,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:54:02,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:54:02,447 INFO L87 Difference]: Start difference. First operand 2329 states and 5883 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:02,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:02,615 INFO L93 Difference]: Finished difference Result 2886 states and 7152 transitions. [2022-03-01 17:54:02,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:54:02,615 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 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 30 [2022-03-01 17:54:02,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:02,619 INFO L225 Difference]: With dead ends: 2886 [2022-03-01 17:54:02,619 INFO L226 Difference]: Without dead ends: 2864 [2022-03-01 17:54:02,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:54:02,619 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 131 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:02,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 379 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:54:02,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2864 states. [2022-03-01 17:54:02,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2864 to 2615. [2022-03-01 17:54:02,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2615 states, 2614 states have (on average 2.5355776587605203) internal successors, (6628), 2614 states have internal predecessors, (6628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:02,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2615 states to 2615 states and 6628 transitions. [2022-03-01 17:54:02,653 INFO L78 Accepts]: Start accepts. Automaton has 2615 states and 6628 transitions. Word has length 30 [2022-03-01 17:54:02,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:02,653 INFO L470 AbstractCegarLoop]: Abstraction has 2615 states and 6628 transitions. [2022-03-01 17:54:02,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:02,653 INFO L276 IsEmpty]: Start isEmpty. Operand 2615 states and 6628 transitions. [2022-03-01 17:54:02,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:54:02,657 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:02,657 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:02,677 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-03-01 17:54:02,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:02,871 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:54:02,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:02,872 INFO L85 PathProgramCache]: Analyzing trace with hash 729678131, now seen corresponding path program 49 times [2022-03-01 17:54:02,872 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:02,872 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548661264] [2022-03-01 17:54:02,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:02,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:02,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:02,908 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:54:02,908 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:02,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548661264] [2022-03-01 17:54:02,909 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548661264] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:02,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382754815] [2022-03-01 17:54:02,909 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:54:02,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:02,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:02,910 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:02,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-01 17:54:02,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:02,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 17:54:02,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:03,123 INFO L353 Elim1Store]: treesize reduction 118, result has 34.8 percent of original size [2022-03-01 17:54:03,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 82 treesize of output 95 [2022-03-01 17:54:03,195 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:03,195 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 93 treesize of output 93 [2022-03-01 17:54:03,281 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:54:03,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:03,452 INFO L353 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2022-03-01 17:54:03,452 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 84 [2022-03-01 17:54:03,471 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:03,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 100 [2022-03-01 17:54:03,520 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:54:03,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382754815] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:03,521 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:03,521 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 20 [2022-03-01 17:54:03,521 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814087325] [2022-03-01 17:54:03,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:03,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:54:03,521 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:03,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:54:03,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:54:03,522 INFO L87 Difference]: Start difference. First operand 2615 states and 6628 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:03,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:03,684 INFO L93 Difference]: Finished difference Result 3125 states and 7770 transitions. [2022-03-01 17:54:03,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:54:03,684 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:54:03,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:03,689 INFO L225 Difference]: With dead ends: 3125 [2022-03-01 17:54:03,689 INFO L226 Difference]: Without dead ends: 3109 [2022-03-01 17:54:03,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:54:03,690 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 131 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:03,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 494 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:54:03,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3109 states. [2022-03-01 17:54:03,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3109 to 2831. [2022-03-01 17:54:03,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2831 states, 2830 states have (on average 2.5547703180212014) internal successors, (7230), 2830 states have internal predecessors, (7230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:03,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2831 states to 2831 states and 7230 transitions. [2022-03-01 17:54:03,730 INFO L78 Accepts]: Start accepts. Automaton has 2831 states and 7230 transitions. Word has length 30 [2022-03-01 17:54:03,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:03,730 INFO L470 AbstractCegarLoop]: Abstraction has 2831 states and 7230 transitions. [2022-03-01 17:54:03,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:03,730 INFO L276 IsEmpty]: Start isEmpty. Operand 2831 states and 7230 transitions. [2022-03-01 17:54:03,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:54:03,733 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:03,733 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:03,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-01 17:54:03,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-03-01 17:54:03,934 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:54:03,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:03,934 INFO L85 PathProgramCache]: Analyzing trace with hash 2126251315, now seen corresponding path program 50 times [2022-03-01 17:54:03,934 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:03,934 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018720012] [2022-03-01 17:54:03,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:03,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:03,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:03,968 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:54:03,969 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:03,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018720012] [2022-03-01 17:54:03,969 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018720012] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:03,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083816343] [2022-03-01 17:54:03,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:54:03,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:03,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:03,970 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:03,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-01 17:54:03,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:54:03,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:04,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 17:54:04,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:04,149 INFO L353 Elim1Store]: treesize reduction 55, result has 47.6 percent of original size [2022-03-01 17:54:04,150 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 84 treesize of output 80 [2022-03-01 17:54:04,506 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:04,506 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 87 treesize of output 93 [2022-03-01 17:54:04,518 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:54:04,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:04,687 INFO L353 Elim1Store]: treesize reduction 44, result has 45.7 percent of original size [2022-03-01 17:54:04,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 92 treesize of output 100 [2022-03-01 17:54:04,709 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:04,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 116 treesize of output 100 [2022-03-01 17:54:04,760 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:54:04,760 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083816343] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:04,760 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:04,761 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 19 [2022-03-01 17:54:04,761 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905724681] [2022-03-01 17:54:04,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:04,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:54:04,761 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:04,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:54:04,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:54:04,762 INFO L87 Difference]: Start difference. First operand 2831 states and 7230 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:04,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:04,985 INFO L93 Difference]: Finished difference Result 3409 states and 8531 transitions. [2022-03-01 17:54:04,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:54:04,985 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:54:04,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:04,990 INFO L225 Difference]: With dead ends: 3409 [2022-03-01 17:54:04,991 INFO L226 Difference]: Without dead ends: 3384 [2022-03-01 17:54:04,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:54:04,991 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 150 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:04,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 603 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 409 Invalid, 0 Unknown, 58 Unchecked, 0.2s Time] [2022-03-01 17:54:04,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3384 states. [2022-03-01 17:54:05,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3384 to 3017. [2022-03-01 17:54:05,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3017 states, 3016 states have (on average 2.570954907161804) internal successors, (7754), 3016 states have internal predecessors, (7754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:05,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 7754 transitions. [2022-03-01 17:54:05,044 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 7754 transitions. Word has length 30 [2022-03-01 17:54:05,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:05,044 INFO L470 AbstractCegarLoop]: Abstraction has 3017 states and 7754 transitions. [2022-03-01 17:54:05,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:05,044 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 7754 transitions. [2022-03-01 17:54:05,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:54:05,048 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:05,048 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:05,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-01 17:54:05,270 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,SelfDestructingSolverStorable54 [2022-03-01 17:54:05,271 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:54:05,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:05,271 INFO L85 PathProgramCache]: Analyzing trace with hash -91682509, now seen corresponding path program 51 times [2022-03-01 17:54:05,271 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:05,271 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737539644] [2022-03-01 17:54:05,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:05,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:05,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:05,311 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:54:05,312 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:05,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737539644] [2022-03-01 17:54:05,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737539644] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:05,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915691832] [2022-03-01 17:54:05,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:54:05,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:05,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:05,313 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:05,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-01 17:54:05,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-01 17:54:05,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:05,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:54:05,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:05,534 INFO L353 Elim1Store]: treesize reduction 50, result has 43.8 percent of original size [2022-03-01 17:54:05,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 119 treesize of output 91 [2022-03-01 17:54:05,553 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:05,553 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 93 [2022-03-01 17:54:05,629 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:54:05,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:05,863 INFO L353 Elim1Store]: treesize reduction 80, result has 33.9 percent of original size [2022-03-01 17:54:05,863 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 88 treesize of output 112 [2022-03-01 17:54:05,882 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:05,882 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 100 [2022-03-01 17:54:05,934 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:54:05,934 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915691832] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:05,934 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:05,934 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 21 [2022-03-01 17:54:05,934 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836916371] [2022-03-01 17:54:05,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:05,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:54:05,935 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:05,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:54:05,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:54:05,935 INFO L87 Difference]: Start difference. First operand 3017 states and 7754 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:06,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:06,118 INFO L93 Difference]: Finished difference Result 3632 states and 9153 transitions. [2022-03-01 17:54:06,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:54:06,118 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:54:06,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:06,123 INFO L225 Difference]: With dead ends: 3632 [2022-03-01 17:54:06,123 INFO L226 Difference]: Without dead ends: 3610 [2022-03-01 17:54:06,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:54:06,124 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 152 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:06,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 592 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:54:06,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3610 states. [2022-03-01 17:54:06,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3610 to 3254. [2022-03-01 17:54:06,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3254 states, 3253 states have (on average 2.5853058715032278) internal successors, (8410), 3253 states have internal predecessors, (8410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:06,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3254 states to 3254 states and 8410 transitions. [2022-03-01 17:54:06,190 INFO L78 Accepts]: Start accepts. Automaton has 3254 states and 8410 transitions. Word has length 30 [2022-03-01 17:54:06,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:06,190 INFO L470 AbstractCegarLoop]: Abstraction has 3254 states and 8410 transitions. [2022-03-01 17:54:06,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:06,190 INFO L276 IsEmpty]: Start isEmpty. Operand 3254 states and 8410 transitions. [2022-03-01 17:54:06,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:54:06,194 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:06,194 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:06,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-01 17:54:06,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-03-01 17:54:06,416 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:54:06,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:06,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1222308557, now seen corresponding path program 52 times [2022-03-01 17:54:06,417 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:06,417 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931553336] [2022-03-01 17:54:06,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:06,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:06,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:06,455 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:54:06,455 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:06,455 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931553336] [2022-03-01 17:54:06,455 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931553336] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:06,455 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826791361] [2022-03-01 17:54:06,455 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:54:06,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:06,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:06,457 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:06,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-01 17:54:06,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:54:06,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:06,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 17:54:06,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:06,584 INFO L353 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2022-03-01 17:54:06,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 65 [2022-03-01 17:54:07,760 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:07,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 103 treesize of output 96 [2022-03-01 17:54:07,875 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:54:07,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:08,000 INFO L353 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2022-03-01 17:54:08,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 80 [2022-03-01 17:54:08,023 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:08,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 104 treesize of output 100 [2022-03-01 17:54:08,079 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:54:08,080 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826791361] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:08,080 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:08,080 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 17 [2022-03-01 17:54:08,080 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359234147] [2022-03-01 17:54:08,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:08,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:54:08,080 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:08,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:54:08,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:54:08,080 INFO L87 Difference]: Start difference. First operand 3254 states and 8410 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:08,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:08,192 INFO L93 Difference]: Finished difference Result 3875 states and 9849 transitions. [2022-03-01 17:54:08,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:54:08,192 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:54:08,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:08,197 INFO L225 Difference]: With dead ends: 3875 [2022-03-01 17:54:08,197 INFO L226 Difference]: Without dead ends: 3868 [2022-03-01 17:54:08,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:54:08,197 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 117 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:08,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 558 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 276 Invalid, 0 Unknown, 24 Unchecked, 0.1s Time] [2022-03-01 17:54:08,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3868 states. [2022-03-01 17:54:08,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3868 to 3481. [2022-03-01 17:54:08,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3481 states, 3480 states have (on average 2.5977011494252875) internal successors, (9040), 3480 states have internal predecessors, (9040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:08,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3481 states to 3481 states and 9040 transitions. [2022-03-01 17:54:08,260 INFO L78 Accepts]: Start accepts. Automaton has 3481 states and 9040 transitions. Word has length 30 [2022-03-01 17:54:08,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:08,260 INFO L470 AbstractCegarLoop]: Abstraction has 3481 states and 9040 transitions. [2022-03-01 17:54:08,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:08,260 INFO L276 IsEmpty]: Start isEmpty. Operand 3481 states and 9040 transitions. [2022-03-01 17:54:08,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 17:54:08,264 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:08,265 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:08,280 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-03-01 17:54:08,465 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,SelfDestructingSolverStorable56 [2022-03-01 17:54:08,465 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:54:08,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:08,466 INFO L85 PathProgramCache]: Analyzing trace with hash -761163595, now seen corresponding path program 53 times [2022-03-01 17:54:08,466 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:08,466 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575555286] [2022-03-01 17:54:08,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:08,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:08,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:08,580 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:08,580 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:08,580 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575555286] [2022-03-01 17:54:08,580 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575555286] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:08,580 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305473119] [2022-03-01 17:54:08,583 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:54:08,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:08,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:08,585 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:08,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-01 17:54:08,617 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-01 17:54:08,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:08,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-01 17:54:08,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:08,881 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:08,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:09,016 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:09,016 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305473119] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:09,016 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:09,016 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-03-01 17:54:09,016 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801623404] [2022-03-01 17:54:09,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:09,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 17:54:09,017 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:09,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 17:54:09,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=734, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:54:09,017 INFO L87 Difference]: Start difference. First operand 3481 states and 9040 transitions. Second operand has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:10,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:10,342 INFO L93 Difference]: Finished difference Result 4581 states and 11214 transitions. [2022-03-01 17:54:10,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-01 17:54:10,342 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:54:10,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:10,348 INFO L225 Difference]: With dead ends: 4581 [2022-03-01 17:54:10,348 INFO L226 Difference]: Without dead ends: 4581 [2022-03-01 17:54:10,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2393 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2144, Invalid=6412, Unknown=0, NotChecked=0, Total=8556 [2022-03-01 17:54:10,349 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 305 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:10,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 204 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:54:10,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4581 states. [2022-03-01 17:54:10,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4581 to 3164. [2022-03-01 17:54:10,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3164 states, 3163 states have (on average 2.5861523869743914) internal successors, (8180), 3163 states have internal predecessors, (8180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:10,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3164 states to 3164 states and 8180 transitions. [2022-03-01 17:54:10,404 INFO L78 Accepts]: Start accepts. Automaton has 3164 states and 8180 transitions. Word has length 32 [2022-03-01 17:54:10,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:10,404 INFO L470 AbstractCegarLoop]: Abstraction has 3164 states and 8180 transitions. [2022-03-01 17:54:10,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:10,404 INFO L276 IsEmpty]: Start isEmpty. Operand 3164 states and 8180 transitions. [2022-03-01 17:54:10,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 17:54:10,407 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:10,407 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:10,426 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-03-01 17:54:10,619 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,SelfDestructingSolverStorable57 [2022-03-01 17:54:10,619 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:54:10,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:10,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1479898639, now seen corresponding path program 54 times [2022-03-01 17:54:10,619 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:10,619 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693709313] [2022-03-01 17:54:10,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:10,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:10,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:10,723 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:10,723 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:10,723 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693709313] [2022-03-01 17:54:10,723 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693709313] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:10,723 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149552914] [2022-03-01 17:54:10,723 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:54:10,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:10,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:10,724 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:10,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-01 17:54:10,748 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-01 17:54:10,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:10,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-01 17:54:10,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:10,972 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:10,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:11,118 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:11,118 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149552914] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:11,118 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:11,118 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2022-03-01 17:54:11,118 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516974634] [2022-03-01 17:54:11,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:11,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:54:11,119 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:11,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:54:11,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=662, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:54:11,119 INFO L87 Difference]: Start difference. First operand 3164 states and 8180 transitions. Second operand has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:12,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:12,599 INFO L93 Difference]: Finished difference Result 5243 states and 12644 transitions. [2022-03-01 17:54:12,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-01 17:54:12,599 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:54:12,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:12,607 INFO L225 Difference]: With dead ends: 5243 [2022-03-01 17:54:12,607 INFO L226 Difference]: Without dead ends: 5139 [2022-03-01 17:54:12,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2570 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2156, Invalid=6586, Unknown=0, NotChecked=0, Total=8742 [2022-03-01 17:54:12,608 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 627 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:12,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [627 Valid, 195 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:54:12,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5139 states. [2022-03-01 17:54:12,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5139 to 3339. [2022-03-01 17:54:12,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3339 states, 3338 states have (on average 2.5820850808867584) internal successors, (8619), 3338 states have internal predecessors, (8619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:12,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3339 states to 3339 states and 8619 transitions. [2022-03-01 17:54:12,679 INFO L78 Accepts]: Start accepts. Automaton has 3339 states and 8619 transitions. Word has length 32 [2022-03-01 17:54:12,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:12,679 INFO L470 AbstractCegarLoop]: Abstraction has 3339 states and 8619 transitions. [2022-03-01 17:54:12,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:12,679 INFO L276 IsEmpty]: Start isEmpty. Operand 3339 states and 8619 transitions. [2022-03-01 17:54:12,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 17:54:12,682 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:12,682 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:12,698 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-03-01 17:54:12,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-03-01 17:54:12,883 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:54:12,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:12,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1937479539, now seen corresponding path program 55 times [2022-03-01 17:54:12,883 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:12,884 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306481870] [2022-03-01 17:54:12,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:12,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:12,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:12,964 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:12,964 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:12,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306481870] [2022-03-01 17:54:12,964 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306481870] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:12,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370308518] [2022-03-01 17:54:12,964 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:54:12,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:12,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:12,966 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:12,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-01 17:54:12,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:12,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-01 17:54:12,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:13,209 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:13,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:13,433 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:13,433 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370308518] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:13,433 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:13,433 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 30 [2022-03-01 17:54:13,434 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911442010] [2022-03-01 17:54:13,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:13,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 17:54:13,434 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:13,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 17:54:13,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=723, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:54:13,434 INFO L87 Difference]: Start difference. First operand 3339 states and 8619 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:15,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:15,227 INFO L93 Difference]: Finished difference Result 6613 states and 16309 transitions. [2022-03-01 17:54:15,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-03-01 17:54:15,228 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-01 17:54:15,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:15,237 INFO L225 Difference]: With dead ends: 6613 [2022-03-01 17:54:15,237 INFO L226 Difference]: Without dead ends: 6601 [2022-03-01 17:54:15,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5469 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3893, Invalid=10149, Unknown=0, NotChecked=0, Total=14042 [2022-03-01 17:54:15,239 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 616 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:15,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [616 Valid, 199 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:54:15,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6601 states. [2022-03-01 17:54:15,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6601 to 4305. [2022-03-01 17:54:15,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4305 states, 4304 states have (on average 2.5820167286245352) internal successors, (11113), 4304 states have internal predecessors, (11113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:15,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4305 states to 4305 states and 11113 transitions. [2022-03-01 17:54:15,321 INFO L78 Accepts]: Start accepts. Automaton has 4305 states and 11113 transitions. Word has length 32 [2022-03-01 17:54:15,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:15,321 INFO L470 AbstractCegarLoop]: Abstraction has 4305 states and 11113 transitions. [2022-03-01 17:54:15,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:15,321 INFO L276 IsEmpty]: Start isEmpty. Operand 4305 states and 11113 transitions. [2022-03-01 17:54:15,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 17:54:15,326 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:15,326 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:15,341 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-03-01 17:54:15,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:15,526 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:54:15,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:15,527 INFO L85 PathProgramCache]: Analyzing trace with hash 973589675, now seen corresponding path program 56 times [2022-03-01 17:54:15,527 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:15,527 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155658127] [2022-03-01 17:54:15,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:15,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:15,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:15,620 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:15,620 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:15,620 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155658127] [2022-03-01 17:54:15,620 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155658127] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:15,620 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786503340] [2022-03-01 17:54:15,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:54:15,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:15,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:15,622 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:15,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-01 17:54:15,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:54:15,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:15,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-01 17:54:15,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:15,920 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:15,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:16,139 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:16,139 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786503340] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:16,139 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:16,139 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 29 [2022-03-01 17:54:16,139 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124707552] [2022-03-01 17:54:16,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:16,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:54:16,140 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:16,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:54:16,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=635, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:54:16,140 INFO L87 Difference]: Start difference. First operand 4305 states and 11113 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) [2022-03-01 17:54:17,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:17,088 INFO L93 Difference]: Finished difference Result 4664 states and 11802 transitions. [2022-03-01 17:54:17,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-01 17:54:17,088 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 [2022-03-01 17:54:17,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:17,094 INFO L225 Difference]: With dead ends: 4664 [2022-03-01 17:54:17,094 INFO L226 Difference]: Without dead ends: 4660 [2022-03-01 17:54:17,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1583 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1634, Invalid=4218, Unknown=0, NotChecked=0, Total=5852 [2022-03-01 17:54:17,095 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 232 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:17,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 93 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:54:17,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4660 states. [2022-03-01 17:54:17,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4660 to 4305. [2022-03-01 17:54:17,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4305 states, 4304 states have (on average 2.5810873605947955) internal successors, (11109), 4304 states have internal predecessors, (11109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:17,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4305 states to 4305 states and 11109 transitions. [2022-03-01 17:54:17,149 INFO L78 Accepts]: Start accepts. Automaton has 4305 states and 11109 transitions. Word has length 32 [2022-03-01 17:54:17,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:17,150 INFO L470 AbstractCegarLoop]: Abstraction has 4305 states and 11109 transitions. [2022-03-01 17:54:17,150 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) [2022-03-01 17:54:17,150 INFO L276 IsEmpty]: Start isEmpty. Operand 4305 states and 11109 transitions. [2022-03-01 17:54:17,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 17:54:17,154 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:17,154 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:17,177 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-03-01 17:54:17,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:17,367 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:54:17,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:17,368 INFO L85 PathProgramCache]: Analyzing trace with hash 218195441, now seen corresponding path program 57 times [2022-03-01 17:54:17,368 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:17,368 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004961618] [2022-03-01 17:54:17,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:17,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:17,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:17,439 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 27 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:54:17,439 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:17,439 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004961618] [2022-03-01 17:54:17,439 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004961618] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:17,439 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445375660] [2022-03-01 17:54:17,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:54:17,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:17,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:17,440 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:17,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-01 17:54:17,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-01 17:54:17,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:17,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-01 17:54:17,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:17,709 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:17,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:17,926 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:17,927 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445375660] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:17,927 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:17,927 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 29 [2022-03-01 17:54:17,927 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877041551] [2022-03-01 17:54:17,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:17,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:54:17,927 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:17,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:54:17,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=664, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:54:17,928 INFO L87 Difference]: Start difference. First operand 4305 states and 11109 transitions. Second operand has 30 states, 30 states have (on average 2.533333333333333) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:18,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:18,955 INFO L93 Difference]: Finished difference Result 5836 states and 14714 transitions. [2022-03-01 17:54:18,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-01 17:54:18,955 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.533333333333333) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-01 17:54:18,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:18,963 INFO L225 Difference]: With dead ends: 5836 [2022-03-01 17:54:18,963 INFO L226 Difference]: Without dead ends: 5818 [2022-03-01 17:54:18,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1671 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1592, Invalid=4260, Unknown=0, NotChecked=0, Total=5852 [2022-03-01 17:54:18,964 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 318 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:18,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 147 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:54:18,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5818 states. [2022-03-01 17:54:19,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5818 to 4428. [2022-03-01 17:54:19,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4428 states, 4427 states have (on average 2.5897899254574206) internal successors, (11465), 4427 states have internal predecessors, (11465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:19,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4428 states to 4428 states and 11465 transitions. [2022-03-01 17:54:19,031 INFO L78 Accepts]: Start accepts. Automaton has 4428 states and 11465 transitions. Word has length 32 [2022-03-01 17:54:19,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:19,031 INFO L470 AbstractCegarLoop]: Abstraction has 4428 states and 11465 transitions. [2022-03-01 17:54:19,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.533333333333333) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:19,031 INFO L276 IsEmpty]: Start isEmpty. Operand 4428 states and 11465 transitions. [2022-03-01 17:54:19,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 17:54:19,036 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:19,036 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:19,052 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-03-01 17:54:19,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:19,236 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:54:19,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:19,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1357990529, now seen corresponding path program 58 times [2022-03-01 17:54:19,237 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:19,237 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14726736] [2022-03-01 17:54:19,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:19,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:19,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:19,334 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:19,335 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:19,335 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14726736] [2022-03-01 17:54:19,335 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14726736] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:19,335 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015001081] [2022-03-01 17:54:19,335 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:54:19,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:19,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:19,336 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:19,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-01 17:54:19,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:54:19,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:19,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-01 17:54:19,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:19,620 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:19,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:19,821 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:19,821 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015001081] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:19,821 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:19,822 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 29 [2022-03-01 17:54:19,822 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217540598] [2022-03-01 17:54:19,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:19,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:54:19,822 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:19,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:54:19,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:54:19,823 INFO L87 Difference]: Start difference. First operand 4428 states and 11465 transitions. Second operand has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:20,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:20,786 INFO L93 Difference]: Finished difference Result 5254 states and 13180 transitions. [2022-03-01 17:54:20,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-01 17:54:20,787 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-01 17:54:20,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:20,795 INFO L225 Difference]: With dead ends: 5254 [2022-03-01 17:54:20,795 INFO L226 Difference]: Without dead ends: 5238 [2022-03-01 17:54:20,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1714 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1639, Invalid=4367, Unknown=0, NotChecked=0, Total=6006 [2022-03-01 17:54:20,796 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 281 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:20,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 133 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:54:20,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5238 states. [2022-03-01 17:54:20,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5238 to 4516. [2022-03-01 17:54:20,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4516 states, 4515 states have (on average 2.5918050941306756) internal successors, (11702), 4515 states have internal predecessors, (11702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:20,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4516 states to 4516 states and 11702 transitions. [2022-03-01 17:54:20,896 INFO L78 Accepts]: Start accepts. Automaton has 4516 states and 11702 transitions. Word has length 32 [2022-03-01 17:54:20,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:20,897 INFO L470 AbstractCegarLoop]: Abstraction has 4516 states and 11702 transitions. [2022-03-01 17:54:20,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:20,897 INFO L276 IsEmpty]: Start isEmpty. Operand 4516 states and 11702 transitions. [2022-03-01 17:54:20,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 17:54:20,906 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:20,906 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:20,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-03-01 17:54:21,120 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,SelfDestructingSolverStorable62 [2022-03-01 17:54:21,121 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:54:21,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:21,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1087164675, now seen corresponding path program 59 times [2022-03-01 17:54:21,121 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:21,121 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908617676] [2022-03-01 17:54:21,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:21,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:21,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:21,201 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:21,201 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:21,201 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908617676] [2022-03-01 17:54:21,201 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908617676] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:21,201 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112936827] [2022-03-01 17:54:21,201 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:54:21,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:21,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:21,202 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:21,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-01 17:54:21,227 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-03-01 17:54:21,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:21,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-01 17:54:21,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:21,446 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:21,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:21,594 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:21,594 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112936827] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:21,594 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:21,594 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 29 [2022-03-01 17:54:21,594 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056519587] [2022-03-01 17:54:21,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:21,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:54:21,595 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:21,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:54:21,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=650, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:54:21,595 INFO L87 Difference]: Start difference. First operand 4516 states and 11702 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:22,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:22,584 INFO L93 Difference]: Finished difference Result 5594 states and 13918 transitions. [2022-03-01 17:54:22,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-01 17:54:22,584 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 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 [2022-03-01 17:54:22,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:22,591 INFO L225 Difference]: With dead ends: 5594 [2022-03-01 17:54:22,591 INFO L226 Difference]: Without dead ends: 5566 [2022-03-01 17:54:22,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1858 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1652, Invalid=4510, Unknown=0, NotChecked=0, Total=6162 [2022-03-01 17:54:22,591 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 273 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:22,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 186 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:54:22,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5566 states. [2022-03-01 17:54:22,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5566 to 4347. [2022-03-01 17:54:22,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4347 states, 4346 states have (on average 2.588587206626783) internal successors, (11250), 4346 states have internal predecessors, (11250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:22,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4347 states to 4347 states and 11250 transitions. [2022-03-01 17:54:22,672 INFO L78 Accepts]: Start accepts. Automaton has 4347 states and 11250 transitions. Word has length 32 [2022-03-01 17:54:22,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:22,672 INFO L470 AbstractCegarLoop]: Abstraction has 4347 states and 11250 transitions. [2022-03-01 17:54:22,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:22,672 INFO L276 IsEmpty]: Start isEmpty. Operand 4347 states and 11250 transitions. [2022-03-01 17:54:22,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 17:54:22,677 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:22,677 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:22,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-03-01 17:54:22,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2022-03-01 17:54:22,901 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:54:22,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:22,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1534204807, now seen corresponding path program 60 times [2022-03-01 17:54:22,901 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:22,901 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958523990] [2022-03-01 17:54:22,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:22,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:22,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:22,993 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:22,993 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:22,993 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958523990] [2022-03-01 17:54:22,993 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958523990] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:22,993 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810819555] [2022-03-01 17:54:22,993 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:54:22,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:22,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:22,996 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:23,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-01 17:54:23,031 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-01 17:54:23,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:23,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-01 17:54:23,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:23,278 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:23,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:23,416 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:23,416 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810819555] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:23,416 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:23,416 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 29 [2022-03-01 17:54:23,417 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570729866] [2022-03-01 17:54:23,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:23,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:54:23,417 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:23,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:54:23,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=653, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:54:23,417 INFO L87 Difference]: Start difference. First operand 4347 states and 11250 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:24,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:24,386 INFO L93 Difference]: Finished difference Result 5720 states and 14080 transitions. [2022-03-01 17:54:24,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-01 17:54:24,387 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-01 17:54:24,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:24,394 INFO L225 Difference]: With dead ends: 5720 [2022-03-01 17:54:24,394 INFO L226 Difference]: Without dead ends: 5686 [2022-03-01 17:54:24,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1963 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1673, Invalid=4647, Unknown=0, NotChecked=0, Total=6320 [2022-03-01 17:54:24,395 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 271 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:24,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 155 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:54:24,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5686 states. [2022-03-01 17:54:24,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5686 to 3872. [2022-03-01 17:54:24,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3872 states, 3871 states have (on average 2.579178506845776) internal successors, (9984), 3871 states have internal predecessors, (9984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:24,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3872 states to 3872 states and 9984 transitions. [2022-03-01 17:54:24,464 INFO L78 Accepts]: Start accepts. Automaton has 3872 states and 9984 transitions. Word has length 32 [2022-03-01 17:54:24,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:24,464 INFO L470 AbstractCegarLoop]: Abstraction has 3872 states and 9984 transitions. [2022-03-01 17:54:24,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:24,464 INFO L276 IsEmpty]: Start isEmpty. Operand 3872 states and 9984 transitions. [2022-03-01 17:54:24,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 17:54:24,467 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:24,467 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:24,482 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-03-01 17:54:24,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:24,667 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:54:24,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:24,668 INFO L85 PathProgramCache]: Analyzing trace with hash 314403765, now seen corresponding path program 61 times [2022-03-01 17:54:24,668 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:24,668 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653178880] [2022-03-01 17:54:24,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:24,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:24,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:24,781 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:54:24,781 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:24,781 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653178880] [2022-03-01 17:54:24,781 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653178880] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:24,781 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506061459] [2022-03-01 17:54:24,781 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:54:24,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:24,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:24,784 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:24,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-01 17:54:24,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:24,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-01 17:54:24,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:25,096 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:25,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:25,278 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:25,278 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506061459] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:25,278 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:25,278 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 30 [2022-03-01 17:54:25,278 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495515332] [2022-03-01 17:54:25,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:25,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 17:54:25,279 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:25,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 17:54:25,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=739, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:54:25,279 INFO L87 Difference]: Start difference. First operand 3872 states and 9984 transitions. Second operand has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:26,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:26,783 INFO L93 Difference]: Finished difference Result 5438 states and 13049 transitions. [2022-03-01 17:54:26,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-01 17:54:26,785 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-01 17:54:26,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:26,792 INFO L225 Difference]: With dead ends: 5438 [2022-03-01 17:54:26,792 INFO L226 Difference]: Without dead ends: 5438 [2022-03-01 17:54:26,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2798 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2297, Invalid=6633, Unknown=0, NotChecked=0, Total=8930 [2022-03-01 17:54:26,793 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 364 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 1052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:26,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 314 Invalid, 1052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 945 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:54:26,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5438 states. [2022-03-01 17:54:26,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5438 to 3402. [2022-03-01 17:54:26,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3402 states, 3401 states have (on average 2.5633637165539547) internal successors, (8718), 3401 states have internal predecessors, (8718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:26,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3402 states to 3402 states and 8718 transitions. [2022-03-01 17:54:26,852 INFO L78 Accepts]: Start accepts. Automaton has 3402 states and 8718 transitions. Word has length 32 [2022-03-01 17:54:26,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:26,852 INFO L470 AbstractCegarLoop]: Abstraction has 3402 states and 8718 transitions. [2022-03-01 17:54:26,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:26,852 INFO L276 IsEmpty]: Start isEmpty. Operand 3402 states and 8718 transitions. [2022-03-01 17:54:26,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 17:54:26,855 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:26,855 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:26,870 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-03-01 17:54:27,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:27,056 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:54:27,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:27,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1022655503, now seen corresponding path program 62 times [2022-03-01 17:54:27,056 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:27,056 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910869592] [2022-03-01 17:54:27,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:27,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:27,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:27,142 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:54:27,142 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:27,142 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910869592] [2022-03-01 17:54:27,143 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910869592] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:27,143 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248716989] [2022-03-01 17:54:27,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:54:27,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:27,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:27,144 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) [2022-03-01 17:54:27,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-01 17:54:27,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:54:27,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:27,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-01 17:54:27,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:27,419 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:27,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:27,596 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:27,597 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248716989] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:27,597 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:27,597 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 29 [2022-03-01 17:54:27,597 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746359702] [2022-03-01 17:54:27,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:27,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:54:27,597 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:27,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:54:27,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=661, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:54:27,598 INFO L87 Difference]: Start difference. First operand 3402 states and 8718 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:28,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:28,633 INFO L93 Difference]: Finished difference Result 4252 states and 10318 transitions. [2022-03-01 17:54:28,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-01 17:54:28,633 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-01 17:54:28,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:28,638 INFO L225 Difference]: With dead ends: 4252 [2022-03-01 17:54:28,638 INFO L226 Difference]: Without dead ends: 4186 [2022-03-01 17:54:28,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1903 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1524, Invalid=4638, Unknown=0, NotChecked=0, Total=6162 [2022-03-01 17:54:28,639 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 402 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:28,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 213 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:54:28,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4186 states. [2022-03-01 17:54:28,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4186 to 3264. [2022-03-01 17:54:28,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3264 states, 3263 states have (on average 2.5485749310450507) internal successors, (8316), 3263 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:28,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3264 states to 3264 states and 8316 transitions. [2022-03-01 17:54:28,684 INFO L78 Accepts]: Start accepts. Automaton has 3264 states and 8316 transitions. Word has length 32 [2022-03-01 17:54:28,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:28,684 INFO L470 AbstractCegarLoop]: Abstraction has 3264 states and 8316 transitions. [2022-03-01 17:54:28,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:28,684 INFO L276 IsEmpty]: Start isEmpty. Operand 3264 states and 8316 transitions. [2022-03-01 17:54:28,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 17:54:28,686 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:28,687 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:28,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-03-01 17:54:28,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-03-01 17:54:28,887 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:54:28,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:28,887 INFO L85 PathProgramCache]: Analyzing trace with hash -837548363, now seen corresponding path program 63 times [2022-03-01 17:54:28,887 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:28,888 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418244642] [2022-03-01 17:54:28,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:28,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:28,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:28,992 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:54:28,993 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:28,993 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418244642] [2022-03-01 17:54:28,993 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418244642] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:28,993 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140410221] [2022-03-01 17:54:28,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:54:28,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:28,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:28,996 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) [2022-03-01 17:54:29,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-01 17:54:29,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-01 17:54:29,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:29,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-01 17:54:29,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:29,306 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:29,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:29,471 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:29,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140410221] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:29,471 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:29,472 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 30 [2022-03-01 17:54:29,472 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624380741] [2022-03-01 17:54:29,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:29,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 17:54:29,472 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:29,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 17:54:29,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=736, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:54:29,473 INFO L87 Difference]: Start difference. First operand 3264 states and 8316 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:30,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:30,981 INFO L93 Difference]: Finished difference Result 5122 states and 12148 transitions. [2022-03-01 17:54:30,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-01 17:54:30,982 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-01 17:54:30,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:30,989 INFO L225 Difference]: With dead ends: 5122 [2022-03-01 17:54:30,989 INFO L226 Difference]: Without dead ends: 5122 [2022-03-01 17:54:30,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3795 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2888, Invalid=7618, Unknown=0, NotChecked=0, Total=10506 [2022-03-01 17:54:30,990 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 435 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:30,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [435 Valid, 244 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:54:30,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5122 states. [2022-03-01 17:54:31,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5122 to 2860. [2022-03-01 17:54:31,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2860 states, 2859 states have (on average 2.5183630640083945) internal successors, (7200), 2859 states have internal predecessors, (7200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:31,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2860 states to 2860 states and 7200 transitions. [2022-03-01 17:54:31,035 INFO L78 Accepts]: Start accepts. Automaton has 2860 states and 7200 transitions. Word has length 32 [2022-03-01 17:54:31,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:31,036 INFO L470 AbstractCegarLoop]: Abstraction has 2860 states and 7200 transitions. [2022-03-01 17:54:31,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:31,036 INFO L276 IsEmpty]: Start isEmpty. Operand 2860 states and 7200 transitions. [2022-03-01 17:54:31,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 17:54:31,038 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:31,038 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:31,053 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-03-01 17:54:31,238 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,SelfDestructingSolverStorable67 [2022-03-01 17:54:31,239 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:54:31,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:31,239 INFO L85 PathProgramCache]: Analyzing trace with hash -834470415, now seen corresponding path program 64 times [2022-03-01 17:54:31,239 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:31,239 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386588614] [2022-03-01 17:54:31,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:31,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:31,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:31,317 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:54:31,317 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:31,317 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386588614] [2022-03-01 17:54:31,317 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386588614] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:31,317 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889034167] [2022-03-01 17:54:31,318 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:54:31,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:31,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:31,319 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) [2022-03-01 17:54:31,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-01 17:54:31,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:54:31,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:31,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-01 17:54:31,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:31,569 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:31,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:31,724 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:31,725 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889034167] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:31,725 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:31,725 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 29 [2022-03-01 17:54:31,725 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65586668] [2022-03-01 17:54:31,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:31,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:54:31,725 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:31,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:54:31,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=657, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:54:31,726 INFO L87 Difference]: Start difference. First operand 2860 states and 7200 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:32,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:32,637 INFO L93 Difference]: Finished difference Result 3661 states and 8825 transitions. [2022-03-01 17:54:32,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-01 17:54:32,637 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 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 [2022-03-01 17:54:32,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:32,641 INFO L225 Difference]: With dead ends: 3661 [2022-03-01 17:54:32,641 INFO L226 Difference]: Without dead ends: 3622 [2022-03-01 17:54:32,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1676 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1362, Invalid=4040, Unknown=0, NotChecked=0, Total=5402 [2022-03-01 17:54:32,642 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 283 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:32,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 211 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:54:32,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3622 states. [2022-03-01 17:54:32,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3622 to 2809. [2022-03-01 17:54:32,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2809 states, 2808 states have (on average 2.508190883190883) internal successors, (7043), 2808 states have internal predecessors, (7043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:32,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2809 states to 2809 states and 7043 transitions. [2022-03-01 17:54:32,689 INFO L78 Accepts]: Start accepts. Automaton has 2809 states and 7043 transitions. Word has length 32 [2022-03-01 17:54:32,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:32,689 INFO L470 AbstractCegarLoop]: Abstraction has 2809 states and 7043 transitions. [2022-03-01 17:54:32,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:32,689 INFO L276 IsEmpty]: Start isEmpty. Operand 2809 states and 7043 transitions. [2022-03-01 17:54:32,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 17:54:32,691 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:32,691 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:32,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-03-01 17:54:32,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:32,892 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:54:32,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:32,893 INFO L85 PathProgramCache]: Analyzing trace with hash 341139893, now seen corresponding path program 65 times [2022-03-01 17:54:32,893 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:32,893 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244584538] [2022-03-01 17:54:32,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:32,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:32,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:32,977 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:54:32,977 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:32,977 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244584538] [2022-03-01 17:54:32,977 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244584538] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:32,977 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364150853] [2022-03-01 17:54:32,977 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:54:32,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:32,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:32,978 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) [2022-03-01 17:54:32,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-01 17:54:33,009 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-01 17:54:33,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:33,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-01 17:54:33,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:33,235 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:33,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:33,419 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:33,419 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364150853] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:33,420 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:33,420 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 30 [2022-03-01 17:54:33,420 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394421051] [2022-03-01 17:54:33,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:33,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 17:54:33,420 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:33,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 17:54:33,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=728, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:54:33,420 INFO L87 Difference]: Start difference. First operand 2809 states and 7043 transitions. Second operand has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:35,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:35,193 INFO L93 Difference]: Finished difference Result 5194 states and 12216 transitions. [2022-03-01 17:54:35,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-01 17:54:35,193 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-01 17:54:35,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:35,200 INFO L225 Difference]: With dead ends: 5194 [2022-03-01 17:54:35,200 INFO L226 Difference]: Without dead ends: 5194 [2022-03-01 17:54:35,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5287 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3777, Invalid=9333, Unknown=0, NotChecked=0, Total=13110 [2022-03-01 17:54:35,202 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 512 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 835 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:35,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [512 Valid, 277 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 835 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:54:35,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5194 states. [2022-03-01 17:54:35,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5194 to 3307. [2022-03-01 17:54:35,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3307 states, 3306 states have (on average 2.481246218995765) internal successors, (8203), 3306 states have internal predecessors, (8203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:35,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3307 states to 3307 states and 8203 transitions. [2022-03-01 17:54:35,263 INFO L78 Accepts]: Start accepts. Automaton has 3307 states and 8203 transitions. Word has length 32 [2022-03-01 17:54:35,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:35,263 INFO L470 AbstractCegarLoop]: Abstraction has 3307 states and 8203 transitions. [2022-03-01 17:54:35,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:35,263 INFO L276 IsEmpty]: Start isEmpty. Operand 3307 states and 8203 transitions. [2022-03-01 17:54:35,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 17:54:35,266 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:35,266 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:35,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-03-01 17:54:35,466 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,SelfDestructingSolverStorable69 [2022-03-01 17:54:35,466 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:54:35,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:35,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1427175409, now seen corresponding path program 66 times [2022-03-01 17:54:35,467 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:35,467 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997477559] [2022-03-01 17:54:35,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:35,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:35,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:35,552 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:54:35,553 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:35,553 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997477559] [2022-03-01 17:54:35,553 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997477559] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:35,553 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195691491] [2022-03-01 17:54:35,553 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:54:35,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:35,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:35,555 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) [2022-03-01 17:54:35,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-01 17:54:35,587 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-01 17:54:35,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:35,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-01 17:54:35,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:35,837 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:35,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:36,001 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:36,001 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195691491] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:36,002 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:36,002 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 29 [2022-03-01 17:54:36,002 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745890722] [2022-03-01 17:54:36,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:36,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:54:36,002 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:36,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:54:36,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=650, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:54:36,002 INFO L87 Difference]: Start difference. First operand 3307 states and 8203 transitions. Second operand has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:36,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:36,870 INFO L93 Difference]: Finished difference Result 3840 states and 9263 transitions. [2022-03-01 17:54:36,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-01 17:54:36,870 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-01 17:54:36,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:36,875 INFO L225 Difference]: With dead ends: 3840 [2022-03-01 17:54:36,875 INFO L226 Difference]: Without dead ends: 3822 [2022-03-01 17:54:36,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1295, Invalid=3675, Unknown=0, NotChecked=0, Total=4970 [2022-03-01 17:54:36,876 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 233 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:36,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 216 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 712 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:54:36,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3822 states. [2022-03-01 17:54:36,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3822 to 3381. [2022-03-01 17:54:36,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3381 states, 3380 states have (on average 2.486094674556213) internal successors, (8403), 3380 states have internal predecessors, (8403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:36,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3381 states to 3381 states and 8403 transitions. [2022-03-01 17:54:36,920 INFO L78 Accepts]: Start accepts. Automaton has 3381 states and 8403 transitions. Word has length 32 [2022-03-01 17:54:36,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:36,920 INFO L470 AbstractCegarLoop]: Abstraction has 3381 states and 8403 transitions. [2022-03-01 17:54:36,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:36,921 INFO L276 IsEmpty]: Start isEmpty. Operand 3381 states and 8403 transitions. [2022-03-01 17:54:36,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 17:54:36,923 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:36,923 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:36,939 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-03-01 17:54:37,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:37,124 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:54:37,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:37,124 INFO L85 PathProgramCache]: Analyzing trace with hash 556891317, now seen corresponding path program 67 times [2022-03-01 17:54:37,124 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:37,124 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219187931] [2022-03-01 17:54:37,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:37,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:37,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:37,206 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:54:37,207 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:37,207 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219187931] [2022-03-01 17:54:37,207 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219187931] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:37,207 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87532462] [2022-03-01 17:54:37,207 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:54:37,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:37,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:37,208 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) [2022-03-01 17:54:37,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-01 17:54:37,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:37,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-01 17:54:37,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:37,469 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:37,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:37,673 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:37,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87532462] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:37,673 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:37,674 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 30 [2022-03-01 17:54:37,674 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372613891] [2022-03-01 17:54:37,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:37,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 17:54:37,675 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:37,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 17:54:37,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=715, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:54:37,676 INFO L87 Difference]: Start difference. First operand 3381 states and 8403 transitions. Second operand has 31 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 30 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:39,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:39,726 INFO L93 Difference]: Finished difference Result 6567 states and 15776 transitions. [2022-03-01 17:54:39,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-03-01 17:54:39,726 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 30 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-01 17:54:39,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:39,735 INFO L225 Difference]: With dead ends: 6567 [2022-03-01 17:54:39,735 INFO L226 Difference]: Without dead ends: 6567 [2022-03-01 17:54:39,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7212 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4899, Invalid=12131, Unknown=0, NotChecked=0, Total=17030 [2022-03-01 17:54:39,737 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 719 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 719 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:39,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [719 Valid, 204 Invalid, 909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:54:39,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6567 states. [2022-03-01 17:54:39,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6567 to 5144. [2022-03-01 17:54:39,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5144 states, 5143 states have (on average 2.52109663620455) internal successors, (12966), 5143 states have internal predecessors, (12966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:39,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5144 states to 5144 states and 12966 transitions. [2022-03-01 17:54:39,836 INFO L78 Accepts]: Start accepts. Automaton has 5144 states and 12966 transitions. Word has length 32 [2022-03-01 17:54:39,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:39,837 INFO L470 AbstractCegarLoop]: Abstraction has 5144 states and 12966 transitions. [2022-03-01 17:54:39,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 30 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:39,837 INFO L276 IsEmpty]: Start isEmpty. Operand 5144 states and 12966 transitions. [2022-03-01 17:54:39,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 17:54:39,841 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:39,841 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:39,857 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-03-01 17:54:40,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:40,044 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:54:40,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:40,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1389129317, now seen corresponding path program 68 times [2022-03-01 17:54:40,044 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:40,044 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14404268] [2022-03-01 17:54:40,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:40,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:40,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:40,126 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:54:40,126 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:40,126 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14404268] [2022-03-01 17:54:40,126 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14404268] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:40,126 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327533529] [2022-03-01 17:54:40,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:54:40,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:40,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:40,132 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) [2022-03-01 17:54:40,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-01 17:54:40,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:54:40,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:40,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-01 17:54:40,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:40,404 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:40,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:40,605 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 22 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:40,605 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327533529] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:40,605 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:40,605 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 29 [2022-03-01 17:54:40,606 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450942620] [2022-03-01 17:54:40,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:40,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:54:40,606 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:40,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:54:40,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=654, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:54:40,606 INFO L87 Difference]: Start difference. First operand 5144 states and 12966 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) [2022-03-01 17:54:41,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:41,958 INFO L93 Difference]: Finished difference Result 6009 states and 14677 transitions. [2022-03-01 17:54:41,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-01 17:54:41,959 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 [2022-03-01 17:54:41,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:41,966 INFO L225 Difference]: With dead ends: 6009 [2022-03-01 17:54:41,966 INFO L226 Difference]: Without dead ends: 6005 [2022-03-01 17:54:41,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2920 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2532, Invalid=6398, Unknown=0, NotChecked=0, Total=8930 [2022-03-01 17:54:41,967 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 452 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:41,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [452 Valid, 117 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:54:41,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6005 states. [2022-03-01 17:54:42,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6005 to 5062. [2022-03-01 17:54:42,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5062 states, 5061 states have (on average 2.517091483896463) internal successors, (12739), 5061 states have internal predecessors, (12739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:42,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5062 states to 5062 states and 12739 transitions. [2022-03-01 17:54:42,040 INFO L78 Accepts]: Start accepts. Automaton has 5062 states and 12739 transitions. Word has length 32 [2022-03-01 17:54:42,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:42,041 INFO L470 AbstractCegarLoop]: Abstraction has 5062 states and 12739 transitions. [2022-03-01 17:54:42,041 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) [2022-03-01 17:54:42,041 INFO L276 IsEmpty]: Start isEmpty. Operand 5062 states and 12739 transitions. [2022-03-01 17:54:42,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 17:54:42,045 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:42,045 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:42,060 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-03-01 17:54:42,245 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,SelfDestructingSolverStorable72 [2022-03-01 17:54:42,245 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:54:42,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:42,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1895475583, now seen corresponding path program 69 times [2022-03-01 17:54:42,246 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:42,246 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698971643] [2022-03-01 17:54:42,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:42,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:42,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:42,333 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:54:42,333 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:42,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698971643] [2022-03-01 17:54:42,334 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698971643] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:42,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752799855] [2022-03-01 17:54:42,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:54:42,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:42,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:42,335 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) [2022-03-01 17:54:42,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-01 17:54:42,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-01 17:54:42,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:42,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-01 17:54:42,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:42,576 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:42,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:42,756 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 22 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:42,757 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752799855] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:42,757 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:42,757 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 29 [2022-03-01 17:54:42,757 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236337587] [2022-03-01 17:54:42,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:42,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:54:42,757 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:42,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:54:42,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=656, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:54:42,758 INFO L87 Difference]: Start difference. First operand 5062 states and 12739 transitions. Second operand has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:43,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:43,971 INFO L93 Difference]: Finished difference Result 6244 states and 15277 transitions. [2022-03-01 17:54:43,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-01 17:54:43,971 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-01 17:54:43,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:43,979 INFO L225 Difference]: With dead ends: 6244 [2022-03-01 17:54:43,979 INFO L226 Difference]: Without dead ends: 6232 [2022-03-01 17:54:43,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2477 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2173, Invalid=5659, Unknown=0, NotChecked=0, Total=7832 [2022-03-01 17:54:43,980 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 426 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:43,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [426 Valid, 123 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:54:43,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6232 states. [2022-03-01 17:54:44,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6232 to 5108. [2022-03-01 17:54:44,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5108 states, 5107 states have (on average 2.522811826904249) internal successors, (12884), 5107 states have internal predecessors, (12884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:44,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5108 states to 5108 states and 12884 transitions. [2022-03-01 17:54:44,052 INFO L78 Accepts]: Start accepts. Automaton has 5108 states and 12884 transitions. Word has length 32 [2022-03-01 17:54:44,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:44,052 INFO L470 AbstractCegarLoop]: Abstraction has 5108 states and 12884 transitions. [2022-03-01 17:54:44,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:44,053 INFO L276 IsEmpty]: Start isEmpty. Operand 5108 states and 12884 transitions. [2022-03-01 17:54:44,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 17:54:44,056 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:44,057 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:44,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-03-01 17:54:44,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:44,257 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:54:44,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:44,257 INFO L85 PathProgramCache]: Analyzing trace with hash -2122696963, now seen corresponding path program 70 times [2022-03-01 17:54:44,257 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:44,258 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584053646] [2022-03-01 17:54:44,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:44,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:44,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:44,353 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:54:44,354 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:44,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584053646] [2022-03-01 17:54:44,354 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584053646] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:44,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694353772] [2022-03-01 17:54:44,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:54:44,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:44,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:44,356 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:44,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-01 17:54:44,382 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:54:44,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:44,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-01 17:54:44,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:44,630 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:44,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:44,797 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:44,797 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694353772] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:44,797 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:44,797 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 29 [2022-03-01 17:54:44,797 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775673212] [2022-03-01 17:54:44,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:44,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:54:44,798 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:44,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:54:44,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=656, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:54:44,798 INFO L87 Difference]: Start difference. First operand 5108 states and 12884 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:45,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:45,973 INFO L93 Difference]: Finished difference Result 6722 states and 16413 transitions. [2022-03-01 17:54:45,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-01 17:54:45,974 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 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 [2022-03-01 17:54:45,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:45,987 INFO L225 Difference]: With dead ends: 6722 [2022-03-01 17:54:45,987 INFO L226 Difference]: Without dead ends: 6702 [2022-03-01 17:54:45,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2249 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1999, Invalid=5311, Unknown=0, NotChecked=0, Total=7310 [2022-03-01 17:54:45,988 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 440 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:45,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [440 Valid, 141 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:54:45,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6702 states. [2022-03-01 17:54:46,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6702 to 5738. [2022-03-01 17:54:46,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5738 states, 5737 states have (on average 2.5281506013595956) internal successors, (14504), 5737 states have internal predecessors, (14504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:46,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5738 states to 5738 states and 14504 transitions. [2022-03-01 17:54:46,119 INFO L78 Accepts]: Start accepts. Automaton has 5738 states and 14504 transitions. Word has length 32 [2022-03-01 17:54:46,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:46,119 INFO L470 AbstractCegarLoop]: Abstraction has 5738 states and 14504 transitions. [2022-03-01 17:54:46,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:46,119 INFO L276 IsEmpty]: Start isEmpty. Operand 5738 states and 14504 transitions. [2022-03-01 17:54:46,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 17:54:46,125 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:46,125 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:46,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-03-01 17:54:46,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:46,342 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:54:46,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:46,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1439111047, now seen corresponding path program 71 times [2022-03-01 17:54:46,342 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:46,342 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410271428] [2022-03-01 17:54:46,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:46,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:46,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:46,440 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:54:46,440 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:46,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410271428] [2022-03-01 17:54:46,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410271428] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:46,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620630020] [2022-03-01 17:54:46,440 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:54:46,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:46,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:46,441 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:46,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-01 17:54:46,464 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-01 17:54:46,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:46,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-01 17:54:46,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:46,705 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:46,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:46,851 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:46,851 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620630020] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:46,851 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:46,852 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 29 [2022-03-01 17:54:46,852 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200259263] [2022-03-01 17:54:46,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:46,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:54:46,852 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:46,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:54:46,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=655, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:54:46,852 INFO L87 Difference]: Start difference. First operand 5738 states and 14504 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:47,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:47,969 INFO L93 Difference]: Finished difference Result 7634 states and 18636 transitions. [2022-03-01 17:54:47,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-01 17:54:47,969 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-01 17:54:47,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:47,984 INFO L225 Difference]: With dead ends: 7634 [2022-03-01 17:54:47,984 INFO L226 Difference]: Without dead ends: 7606 [2022-03-01 17:54:47,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2255 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1968, Invalid=5342, Unknown=0, NotChecked=0, Total=7310 [2022-03-01 17:54:47,985 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 485 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:47,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [485 Valid, 139 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:54:47,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7606 states. [2022-03-01 17:54:48,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7606 to 6549. [2022-03-01 17:54:48,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6549 states, 6548 states have (on average 2.5284056200366525) internal successors, (16556), 6548 states have internal predecessors, (16556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:48,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6549 states to 6549 states and 16556 transitions. [2022-03-01 17:54:48,117 INFO L78 Accepts]: Start accepts. Automaton has 6549 states and 16556 transitions. Word has length 32 [2022-03-01 17:54:48,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:48,117 INFO L470 AbstractCegarLoop]: Abstraction has 6549 states and 16556 transitions. [2022-03-01 17:54:48,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:48,117 INFO L276 IsEmpty]: Start isEmpty. Operand 6549 states and 16556 transitions. [2022-03-01 17:54:48,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 17:54:48,122 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:48,122 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:48,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-03-01 17:54:48,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:48,323 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:54:48,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:48,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1643042059, now seen corresponding path program 72 times [2022-03-01 17:54:48,323 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:48,323 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955631236] [2022-03-01 17:54:48,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:48,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:48,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:48,429 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:48,430 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:48,430 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955631236] [2022-03-01 17:54:48,430 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955631236] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:48,430 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846221434] [2022-03-01 17:54:48,430 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:54:48,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:48,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:48,432 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:48,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-01 17:54:48,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-01 17:54:48,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:48,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-01 17:54:48,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:48,681 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:48,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:48,807 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:48,807 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846221434] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:48,807 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:48,807 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2022-03-01 17:54:48,807 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844351997] [2022-03-01 17:54:48,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:48,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:54:48,808 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:48,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:54:48,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=653, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:54:48,808 INFO L87 Difference]: Start difference. First operand 6549 states and 16556 transitions. Second operand has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:49,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:49,769 INFO L93 Difference]: Finished difference Result 7611 states and 18726 transitions. [2022-03-01 17:54:49,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-01 17:54:49,769 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-01 17:54:49,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:49,780 INFO L225 Difference]: With dead ends: 7611 [2022-03-01 17:54:49,780 INFO L226 Difference]: Without dead ends: 7575 [2022-03-01 17:54:49,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2009 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1702, Invalid=4778, Unknown=0, NotChecked=0, Total=6480 [2022-03-01 17:54:49,782 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 393 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:49,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [393 Valid, 129 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:54:49,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7575 states. [2022-03-01 17:54:49,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7575 to 6635. [2022-03-01 17:54:49,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6635 states, 6634 states have (on average 2.537232438950859) internal successors, (16832), 6634 states have internal predecessors, (16832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:49,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6635 states to 6635 states and 16832 transitions. [2022-03-01 17:54:49,910 INFO L78 Accepts]: Start accepts. Automaton has 6635 states and 16832 transitions. Word has length 32 [2022-03-01 17:54:49,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:49,911 INFO L470 AbstractCegarLoop]: Abstraction has 6635 states and 16832 transitions. [2022-03-01 17:54:49,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:49,911 INFO L276 IsEmpty]: Start isEmpty. Operand 6635 states and 16832 transitions. [2022-03-01 17:54:49,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-01 17:54:49,917 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:49,917 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:49,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-03-01 17:54:50,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-03-01 17:54:50,131 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:54:50,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:50,132 INFO L85 PathProgramCache]: Analyzing trace with hash 2038373619, now seen corresponding path program 73 times [2022-03-01 17:54:50,132 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:50,132 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676792752] [2022-03-01 17:54:50,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:50,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:50,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:50,184 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:50,184 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:50,184 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676792752] [2022-03-01 17:54:50,184 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676792752] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:50,184 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674858956] [2022-03-01 17:54:50,184 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:54:50,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:50,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:50,186 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:50,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-01 17:54:50,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:50,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:54:50,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:50,346 INFO L353 Elim1Store]: treesize reduction 32, result has 60.5 percent of original size [2022-03-01 17:54:50,346 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 89 treesize of output 89 [2022-03-01 17:54:55,592 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:55,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 175 treesize of output 147 [2022-03-01 17:54:55,602 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:55,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:55,785 INFO L353 Elim1Store]: treesize reduction 32, result has 60.5 percent of original size [2022-03-01 17:54:55,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 104 treesize of output 108 [2022-03-01 17:54:55,812 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:55,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 176 treesize of output 152 [2022-03-01 17:54:55,907 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:55,908 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674858956] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:55,908 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:55,908 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 21 [2022-03-01 17:54:55,908 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17344997] [2022-03-01 17:54:55,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:55,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:54:55,908 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:55,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:54:55,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:54:55,909 INFO L87 Difference]: Start difference. First operand 6635 states and 16832 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:56,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:56,042 INFO L93 Difference]: Finished difference Result 7849 states and 19710 transitions. [2022-03-01 17:54:56,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:54:56,042 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-01 17:54:56,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:56,055 INFO L225 Difference]: With dead ends: 7849 [2022-03-01 17:54:56,055 INFO L226 Difference]: Without dead ends: 7842 [2022-03-01 17:54:56,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:54:56,056 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 132 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:56,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 738 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 256 Invalid, 0 Unknown, 100 Unchecked, 0.1s Time] [2022-03-01 17:54:56,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7842 states. [2022-03-01 17:54:56,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7842 to 7432. [2022-03-01 17:54:56,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7432 states, 7431 states have (on average 2.5446104158255953) internal successors, (18909), 7431 states have internal predecessors, (18909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:56,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7432 states to 7432 states and 18909 transitions. [2022-03-01 17:54:56,174 INFO L78 Accepts]: Start accepts. Automaton has 7432 states and 18909 transitions. Word has length 34 [2022-03-01 17:54:56,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:56,174 INFO L470 AbstractCegarLoop]: Abstraction has 7432 states and 18909 transitions. [2022-03-01 17:54:56,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:56,174 INFO L276 IsEmpty]: Start isEmpty. Operand 7432 states and 18909 transitions. [2022-03-01 17:54:56,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-01 17:54:56,180 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:56,180 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:54:56,195 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-03-01 17:54:56,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:56,381 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:54:56,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:56,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1746623611, now seen corresponding path program 74 times [2022-03-01 17:54:56,381 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:56,381 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850797400] [2022-03-01 17:54:56,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:56,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:56,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:56,429 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:56,429 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:56,429 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850797400] [2022-03-01 17:54:56,430 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850797400] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:56,430 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312286369] [2022-03-01 17:54:56,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:54:56,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:56,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:56,431 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:56,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-01 17:54:56,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:54:56,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:56,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:54:56,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:56,620 INFO L353 Elim1Store]: treesize reduction 32, result has 60.5 percent of original size [2022-03-01 17:54:56,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 89 treesize of output 89 [2022-03-01 17:55:02,389 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:02,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 175 treesize of output 147 [2022-03-01 17:55:02,528 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:02,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:02,697 INFO L353 Elim1Store]: treesize reduction 32, result has 60.5 percent of original size [2022-03-01 17:55:02,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 104 treesize of output 108 [2022-03-01 17:55:02,725 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:02,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 176 treesize of output 152 [2022-03-01 17:55:02,824 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:02,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312286369] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:02,825 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:02,825 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 21 [2022-03-01 17:55:02,825 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99836257] [2022-03-01 17:55:02,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:02,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:55:02,825 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:02,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:55:02,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:55:02,826 INFO L87 Difference]: Start difference. First operand 7432 states and 18909 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:03,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:03,015 INFO L93 Difference]: Finished difference Result 7936 states and 19797 transitions. [2022-03-01 17:55:03,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:55:03,015 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-01 17:55:03,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:03,030 INFO L225 Difference]: With dead ends: 7936 [2022-03-01 17:55:03,030 INFO L226 Difference]: Without dead ends: 7933 [2022-03-01 17:55:03,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:55:03,031 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 151 mSDsluCounter, 1122 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 951 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 223 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:03,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 951 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 408 Invalid, 0 Unknown, 223 Unchecked, 0.2s Time] [2022-03-01 17:55:03,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7933 states. [2022-03-01 17:55:03,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7933 to 7478. [2022-03-01 17:55:03,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7478 states, 7477 states have (on average 2.5451384245018054) internal successors, (19030), 7477 states have internal predecessors, (19030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:03,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7478 states to 7478 states and 19030 transitions. [2022-03-01 17:55:03,173 INFO L78 Accepts]: Start accepts. Automaton has 7478 states and 19030 transitions. Word has length 34 [2022-03-01 17:55:03,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:03,173 INFO L470 AbstractCegarLoop]: Abstraction has 7478 states and 19030 transitions. [2022-03-01 17:55:03,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:03,173 INFO L276 IsEmpty]: Start isEmpty. Operand 7478 states and 19030 transitions. [2022-03-01 17:55:03,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-01 17:55:03,180 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:03,180 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:03,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-03-01 17:55:03,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:03,395 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:55:03,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:03,396 INFO L85 PathProgramCache]: Analyzing trace with hash 60071939, now seen corresponding path program 75 times [2022-03-01 17:55:03,396 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:03,396 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008122361] [2022-03-01 17:55:03,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:03,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:03,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:03,439 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:03,439 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:03,439 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008122361] [2022-03-01 17:55:03,439 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008122361] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:03,439 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373567216] [2022-03-01 17:55:03,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:55:03,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:03,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:03,441 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:03,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-01 17:55:03,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-01 17:55:03,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:03,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:55:03,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:03,979 INFO L353 Elim1Store]: treesize reduction 409, result has 22.7 percent of original size [2022-03-01 17:55:03,979 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 13 new quantified variables, introduced 36 case distinctions, treesize of input 142 treesize of output 175 [2022-03-01 17:55:03,990 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:03,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:04,374 INFO L353 Elim1Store]: treesize reduction 72, result has 40.5 percent of original size [2022-03-01 17:55:04,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 148 treesize of output 134 [2022-03-01 17:55:04,403 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:04,403 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 196 treesize of output 152 [2022-03-01 17:55:04,495 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:04,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373567216] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:04,495 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:04,495 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 26 [2022-03-01 17:55:04,495 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158783292] [2022-03-01 17:55:04,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:04,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:55:04,495 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:04,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:55:04,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:55:04,496 INFO L87 Difference]: Start difference. First operand 7478 states and 19030 transitions. Second operand has 26 states, 26 states have (on average 3.0) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:04,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:04,735 INFO L93 Difference]: Finished difference Result 7725 states and 19406 transitions. [2022-03-01 17:55:04,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:55:04,736 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.0) internal successors, (78), 26 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 34 [2022-03-01 17:55:04,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:04,750 INFO L225 Difference]: With dead ends: 7725 [2022-03-01 17:55:04,750 INFO L226 Difference]: Without dead ends: 7722 [2022-03-01 17:55:04,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:55:04,751 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 145 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:04,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 693 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:55:04,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7722 states. [2022-03-01 17:55:04,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7722 to 7360. [2022-03-01 17:55:04,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7360 states, 7359 states have (on average 2.545726321511075) internal successors, (18734), 7359 states have internal predecessors, (18734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:04,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7360 states to 7360 states and 18734 transitions. [2022-03-01 17:55:04,903 INFO L78 Accepts]: Start accepts. Automaton has 7360 states and 18734 transitions. Word has length 34 [2022-03-01 17:55:04,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:04,903 INFO L470 AbstractCegarLoop]: Abstraction has 7360 states and 18734 transitions. [2022-03-01 17:55:04,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.0) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:04,904 INFO L276 IsEmpty]: Start isEmpty. Operand 7360 states and 18734 transitions. [2022-03-01 17:55:04,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-01 17:55:04,909 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:04,909 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:04,924 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-03-01 17:55:05,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-03-01 17:55:05,110 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:55:05,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:05,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1739321357, now seen corresponding path program 76 times [2022-03-01 17:55:05,110 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:05,110 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938865383] [2022-03-01 17:55:05,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:05,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:05,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:05,155 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:55:05,155 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:05,155 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938865383] [2022-03-01 17:55:05,155 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938865383] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:05,155 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472060170] [2022-03-01 17:55:05,155 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:55:05,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:05,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:05,157 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:05,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-01 17:55:05,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:55:05,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:05,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:55:05,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:05,519 INFO L353 Elim1Store]: treesize reduction 267, result has 26.8 percent of original size [2022-03-01 17:55:05,519 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 113 treesize of output 142 [2022-03-01 17:55:05,601 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:05,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 163 treesize of output 144 [2022-03-01 17:55:05,761 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:55:05,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:05,994 INFO L353 Elim1Store]: treesize reduction 32, result has 60.5 percent of original size [2022-03-01 17:55:05,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 120 treesize of output 114 [2022-03-01 17:55:06,021 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:06,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 188 treesize of output 152 [2022-03-01 17:55:06,123 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:55:06,123 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472060170] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:06,123 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:06,123 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 25 [2022-03-01 17:55:06,123 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693056092] [2022-03-01 17:55:06,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:06,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:55:06,123 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:06,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:55:06,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:55:06,124 INFO L87 Difference]: Start difference. First operand 7360 states and 18734 transitions. Second operand has 25 states, 25 states have (on average 2.84) internal successors, (71), 25 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:06,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:06,429 INFO L93 Difference]: Finished difference Result 8196 states and 20663 transitions. [2022-03-01 17:55:06,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:55:06,430 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.84) internal successors, (71), 25 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 34 [2022-03-01 17:55:06,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:06,442 INFO L225 Difference]: With dead ends: 8196 [2022-03-01 17:55:06,442 INFO L226 Difference]: Without dead ends: 8180 [2022-03-01 17:55:06,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:55:06,442 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 163 mSDsluCounter, 1229 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 983 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:06,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 983 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:55:06,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8180 states. [2022-03-01 17:55:06,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8180 to 7776. [2022-03-01 17:55:06,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7776 states, 7775 states have (on average 2.5569131832797427) internal successors, (19880), 7775 states have internal predecessors, (19880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:06,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7776 states to 7776 states and 19880 transitions. [2022-03-01 17:55:06,568 INFO L78 Accepts]: Start accepts. Automaton has 7776 states and 19880 transitions. Word has length 34 [2022-03-01 17:55:06,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:06,568 INFO L470 AbstractCegarLoop]: Abstraction has 7776 states and 19880 transitions. [2022-03-01 17:55:06,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.84) internal successors, (71), 25 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:06,568 INFO L276 IsEmpty]: Start isEmpty. Operand 7776 states and 19880 transitions. [2022-03-01 17:55:06,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-01 17:55:06,574 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:06,574 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:06,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-03-01 17:55:06,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:06,774 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:55:06,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:06,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1003418867, now seen corresponding path program 77 times [2022-03-01 17:55:06,775 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:06,775 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923860000] [2022-03-01 17:55:06,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:06,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:06,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:06,820 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:55:06,820 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:06,821 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923860000] [2022-03-01 17:55:06,821 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923860000] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:06,821 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144514231] [2022-03-01 17:55:06,821 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:55:06,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:06,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:06,822 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:06,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-01 17:55:06,854 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-03-01 17:55:06,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:06,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 17:55:06,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:07,138 INFO L353 Elim1Store]: treesize reduction 156, result has 35.3 percent of original size [2022-03-01 17:55:07,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 21 case distinctions, treesize of input 119 treesize of output 125 [2022-03-01 17:55:07,417 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:07,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 131 treesize of output 144 [2022-03-01 17:55:07,430 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:55:07,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:07,693 INFO L353 Elim1Store]: treesize reduction 68, result has 43.8 percent of original size [2022-03-01 17:55:07,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 128 treesize of output 134 [2022-03-01 17:55:07,720 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:07,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 202 treesize of output 152 [2022-03-01 17:55:07,822 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:55:07,822 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144514231] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:07,822 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:07,822 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 24 [2022-03-01 17:55:07,822 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448325784] [2022-03-01 17:55:07,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:07,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:55:07,823 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:07,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:55:07,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:55:07,823 INFO L87 Difference]: Start difference. First operand 7776 states and 19880 transitions. Second operand has 24 states, 24 states have (on average 2.875) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:08,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:08,054 INFO L93 Difference]: Finished difference Result 8640 states and 21906 transitions. [2022-03-01 17:55:08,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:55:08,054 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-01 17:55:08,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:08,066 INFO L225 Difference]: With dead ends: 8640 [2022-03-01 17:55:08,066 INFO L226 Difference]: Without dead ends: 8615 [2022-03-01 17:55:08,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:55:08,066 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 168 mSDsluCounter, 915 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:08,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 773 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 556 Invalid, 0 Unknown, 12 Unchecked, 0.2s Time] [2022-03-01 17:55:08,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8615 states. [2022-03-01 17:55:08,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8615 to 8091. [2022-03-01 17:55:08,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8091 states, 8090 states have (on average 2.5673671199011125) internal successors, (20770), 8090 states have internal predecessors, (20770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:08,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8091 states to 8091 states and 20770 transitions. [2022-03-01 17:55:08,180 INFO L78 Accepts]: Start accepts. Automaton has 8091 states and 20770 transitions. Word has length 34 [2022-03-01 17:55:08,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:08,180 INFO L470 AbstractCegarLoop]: Abstraction has 8091 states and 20770 transitions. [2022-03-01 17:55:08,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:08,180 INFO L276 IsEmpty]: Start isEmpty. Operand 8091 states and 20770 transitions. [2022-03-01 17:55:08,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-01 17:55:08,186 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:08,186 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:08,202 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-03-01 17:55:08,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:08,387 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:55:08,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:08,388 INFO L85 PathProgramCache]: Analyzing trace with hash -333145613, now seen corresponding path program 78 times [2022-03-01 17:55:08,388 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:08,388 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170641799] [2022-03-01 17:55:08,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:08,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:08,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:08,430 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:55:08,430 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:08,430 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170641799] [2022-03-01 17:55:08,431 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170641799] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:08,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70537490] [2022-03-01 17:55:08,431 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:55:08,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:08,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:08,432 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:08,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-01 17:55:08,494 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-01 17:55:08,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:08,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-01 17:55:08,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:08,807 INFO L353 Elim1Store]: treesize reduction 133, result has 35.1 percent of original size [2022-03-01 17:55:08,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 166 treesize of output 132 [2022-03-01 17:55:08,834 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:08,834 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 141 treesize of output 144 [2022-03-01 17:55:08,847 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:55:08,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:09,177 INFO L353 Elim1Store]: treesize reduction 112, result has 33.7 percent of original size [2022-03-01 17:55:09,177 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 128 treesize of output 150 [2022-03-01 17:55:09,207 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:09,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 196 treesize of output 152 [2022-03-01 17:55:09,348 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:55:09,348 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70537490] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:09,348 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:09,349 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 26 [2022-03-01 17:55:09,349 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566098880] [2022-03-01 17:55:09,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:09,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:55:09,349 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:09,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:55:09,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:55:09,350 INFO L87 Difference]: Start difference. First operand 8091 states and 20770 transitions. Second operand has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 26 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:09,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:09,654 INFO L93 Difference]: Finished difference Result 8983 states and 22909 transitions. [2022-03-01 17:55:09,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:55:09,654 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 26 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:55:09,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:09,667 INFO L225 Difference]: With dead ends: 8983 [2022-03-01 17:55:09,667 INFO L226 Difference]: Without dead ends: 8961 [2022-03-01 17:55:09,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:55:09,668 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 220 mSDsluCounter, 822 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:09,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 700 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:55:09,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8961 states. [2022-03-01 17:55:09,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8961 to 8475. [2022-03-01 17:55:09,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8475 states, 8474 states have (on average 2.577059240028322) internal successors, (21838), 8474 states have internal predecessors, (21838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:09,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8475 states to 8475 states and 21838 transitions. [2022-03-01 17:55:09,798 INFO L78 Accepts]: Start accepts. Automaton has 8475 states and 21838 transitions. Word has length 34 [2022-03-01 17:55:09,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:09,798 INFO L470 AbstractCegarLoop]: Abstraction has 8475 states and 21838 transitions. [2022-03-01 17:55:09,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 26 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:09,798 INFO L276 IsEmpty]: Start isEmpty. Operand 8475 states and 21838 transitions. [2022-03-01 17:55:09,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-01 17:55:09,831 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:09,832 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:09,847 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-03-01 17:55:10,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:10,032 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:55:10,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:10,033 INFO L85 PathProgramCache]: Analyzing trace with hash -576389389, now seen corresponding path program 79 times [2022-03-01 17:55:10,033 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:10,033 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120868899] [2022-03-01 17:55:10,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:10,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:10,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:10,076 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:55:10,076 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:10,076 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120868899] [2022-03-01 17:55:10,077 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120868899] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:10,077 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724379996] [2022-03-01 17:55:10,077 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:55:10,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:10,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:10,078 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:10,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-01 17:55:10,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:10,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:55:10,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:10,286 INFO L353 Elim1Store]: treesize reduction 32, result has 64.0 percent of original size [2022-03-01 17:55:10,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 107 treesize of output 95 [2022-03-01 17:55:14,473 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:14,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 179 treesize of output 144 [2022-03-01 17:55:14,570 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:55:14,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:14,818 INFO L353 Elim1Store]: treesize reduction 164, result has 27.1 percent of original size [2022-03-01 17:55:14,818 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 120 treesize of output 162 [2022-03-01 17:55:14,847 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:14,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 196 treesize of output 152 [2022-03-01 17:55:14,967 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:55:14,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724379996] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:14,967 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:14,967 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 22 [2022-03-01 17:55:14,967 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298717038] [2022-03-01 17:55:14,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:14,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:55:14,967 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:14,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:55:14,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:55:14,968 INFO L87 Difference]: Start difference. First operand 8475 states and 21838 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:15,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:15,171 INFO L93 Difference]: Finished difference Result 9614 states and 24512 transitions. [2022-03-01 17:55:15,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 17:55:15,172 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-01 17:55:15,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:15,186 INFO L225 Difference]: With dead ends: 9614 [2022-03-01 17:55:15,187 INFO L226 Difference]: Without dead ends: 9581 [2022-03-01 17:55:15,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:55:15,187 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 194 mSDsluCounter, 961 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 172 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:15,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 821 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 460 Invalid, 0 Unknown, 172 Unchecked, 0.2s Time] [2022-03-01 17:55:15,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9581 states. [2022-03-01 17:55:15,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9581 to 8919. [2022-03-01 17:55:15,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8919 states, 8918 states have (on average 2.588024220677282) internal successors, (23080), 8918 states have internal predecessors, (23080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:15,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8919 states to 8919 states and 23080 transitions. [2022-03-01 17:55:15,354 INFO L78 Accepts]: Start accepts. Automaton has 8919 states and 23080 transitions. Word has length 34 [2022-03-01 17:55:15,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:15,355 INFO L470 AbstractCegarLoop]: Abstraction has 8919 states and 23080 transitions. [2022-03-01 17:55:15,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:15,355 INFO L276 IsEmpty]: Start isEmpty. Operand 8919 states and 23080 transitions. [2022-03-01 17:55:15,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-01 17:55:15,361 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:15,361 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:15,377 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-03-01 17:55:15,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2022-03-01 17:55:15,562 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:55:15,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:15,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1889543155, now seen corresponding path program 80 times [2022-03-01 17:55:15,563 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:15,563 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133498657] [2022-03-01 17:55:15,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:15,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:15,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:15,609 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:55:15,610 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:15,610 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133498657] [2022-03-01 17:55:15,610 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133498657] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:15,610 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488326767] [2022-03-01 17:55:15,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:55:15,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:15,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:15,611 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:15,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-01 17:55:15,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:55:15,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:15,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-01 17:55:15,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:15,794 INFO L353 Elim1Store]: treesize reduction 32, result has 60.5 percent of original size [2022-03-01 17:55:15,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 89 treesize of output 89 [2022-03-01 17:55:21,263 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:21,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 175 treesize of output 147 [2022-03-01 17:55:21,368 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:55:21,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:21,539 INFO L353 Elim1Store]: treesize reduction 32, result has 60.5 percent of original size [2022-03-01 17:55:21,539 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 104 treesize of output 108 [2022-03-01 17:55:21,566 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:21,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 176 treesize of output 152 [2022-03-01 17:55:21,678 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:55:21,678 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488326767] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:21,678 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:21,678 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 21 [2022-03-01 17:55:21,678 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999240883] [2022-03-01 17:55:21,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:21,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:55:21,679 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:21,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:55:21,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:55:21,679 INFO L87 Difference]: Start difference. First operand 8919 states and 23080 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:21,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:21,875 INFO L93 Difference]: Finished difference Result 9812 states and 25154 transitions. [2022-03-01 17:55:21,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:55:21,875 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 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 34 [2022-03-01 17:55:21,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:21,895 INFO L225 Difference]: With dead ends: 9812 [2022-03-01 17:55:21,896 INFO L226 Difference]: Without dead ends: 9805 [2022-03-01 17:55:21,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:55:21,896 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 150 mSDsluCounter, 1039 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 946 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:21,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 946 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 303 Invalid, 0 Unknown, 110 Unchecked, 0.1s Time] [2022-03-01 17:55:21,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9805 states. [2022-03-01 17:55:22,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9805 to 9257. [2022-03-01 17:55:22,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9257 states, 9256 states have (on average 2.5956136560069143) internal successors, (24025), 9256 states have internal predecessors, (24025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:22,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9257 states to 9257 states and 24025 transitions. [2022-03-01 17:55:22,062 INFO L78 Accepts]: Start accepts. Automaton has 9257 states and 24025 transitions. Word has length 34 [2022-03-01 17:55:22,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:22,062 INFO L470 AbstractCegarLoop]: Abstraction has 9257 states and 24025 transitions. [2022-03-01 17:55:22,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:22,062 INFO L276 IsEmpty]: Start isEmpty. Operand 9257 states and 24025 transitions. [2022-03-01 17:55:22,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-01 17:55:22,070 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:22,070 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:22,086 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-03-01 17:55:22,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:22,271 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:55:22,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:22,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1336215691, now seen corresponding path program 81 times [2022-03-01 17:55:22,271 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:22,271 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802326075] [2022-03-01 17:55:22,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:22,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:22,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:22,410 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:22,410 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:22,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802326075] [2022-03-01 17:55:22,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802326075] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:22,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715456830] [2022-03-01 17:55:22,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:55:22,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:22,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:22,411 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:22,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-01 17:55:22,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-01 17:55:22,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:22,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-01 17:55:22,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:22,718 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:22,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:22,884 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:22,884 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715456830] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:22,884 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:22,885 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 35 [2022-03-01 17:55:22,885 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28009199] [2022-03-01 17:55:22,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:22,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-01 17:55:22,885 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:22,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-01 17:55:22,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1003, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:55:22,914 INFO L87 Difference]: Start difference. First operand 9257 states and 24025 transitions. Second operand has 36 states, 36 states have (on average 2.2777777777777777) internal successors, (82), 35 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:24,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:24,852 INFO L93 Difference]: Finished difference Result 11082 states and 27704 transitions. [2022-03-01 17:55:24,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-01 17:55:24,853 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.2777777777777777) internal successors, (82), 35 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 36 [2022-03-01 17:55:24,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:24,869 INFO L225 Difference]: With dead ends: 11082 [2022-03-01 17:55:24,869 INFO L226 Difference]: Without dead ends: 11082 [2022-03-01 17:55:24,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4214 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3470, Invalid=10572, Unknown=0, NotChecked=0, Total=14042 [2022-03-01 17:55:24,871 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 333 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 979 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:24,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 235 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 979 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:55:24,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11082 states. [2022-03-01 17:55:24,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11082 to 8556. [2022-03-01 17:55:24,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8556 states, 8555 states have (on average 2.586791350087668) internal successors, (22130), 8555 states have internal predecessors, (22130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:25,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8556 states to 8556 states and 22130 transitions. [2022-03-01 17:55:25,007 INFO L78 Accepts]: Start accepts. Automaton has 8556 states and 22130 transitions. Word has length 36 [2022-03-01 17:55:25,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:25,007 INFO L470 AbstractCegarLoop]: Abstraction has 8556 states and 22130 transitions. [2022-03-01 17:55:25,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.2777777777777777) internal successors, (82), 35 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:25,008 INFO L276 IsEmpty]: Start isEmpty. Operand 8556 states and 22130 transitions. [2022-03-01 17:55:25,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-01 17:55:25,015 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:25,015 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:25,031 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-03-01 17:55:25,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:25,216 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:55:25,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:25,216 INFO L85 PathProgramCache]: Analyzing trace with hash -550858319, now seen corresponding path program 82 times [2022-03-01 17:55:25,216 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:25,216 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347103236] [2022-03-01 17:55:25,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:25,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:25,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:25,332 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:25,333 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:25,333 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347103236] [2022-03-01 17:55:25,333 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347103236] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:25,333 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340160481] [2022-03-01 17:55:25,333 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:55:25,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:25,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:25,334 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:25,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-01 17:55:25,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:55:25,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:25,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-01 17:55:25,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:25,646 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:25,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:25,811 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:25,811 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340160481] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:25,811 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:25,811 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 34 [2022-03-01 17:55:25,811 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100098257] [2022-03-01 17:55:25,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:25,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-01 17:55:25,812 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:25,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-01 17:55:25,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=907, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:55:25,812 INFO L87 Difference]: Start difference. First operand 8556 states and 22130 transitions. Second operand has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 34 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:27,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:27,961 INFO L93 Difference]: Finished difference Result 12764 states and 31601 transitions. [2022-03-01 17:55:27,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-03-01 17:55:27,961 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 34 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 36 [2022-03-01 17:55:27,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:27,980 INFO L225 Difference]: With dead ends: 12764 [2022-03-01 17:55:27,980 INFO L226 Difference]: Without dead ends: 12621 [2022-03-01 17:55:27,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4767 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3619, Invalid=11633, Unknown=0, NotChecked=0, Total=15252 [2022-03-01 17:55:27,982 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 766 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 766 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:27,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [766 Valid, 262 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:55:27,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12621 states. [2022-03-01 17:55:28,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12621 to 8919. [2022-03-01 17:55:28,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8919 states, 8918 states have (on average 2.585557299843014) internal successors, (23058), 8918 states have internal predecessors, (23058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:28,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8919 states to 8919 states and 23058 transitions. [2022-03-01 17:55:28,149 INFO L78 Accepts]: Start accepts. Automaton has 8919 states and 23058 transitions. Word has length 36 [2022-03-01 17:55:28,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:28,149 INFO L470 AbstractCegarLoop]: Abstraction has 8919 states and 23058 transitions. [2022-03-01 17:55:28,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 34 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:28,149 INFO L276 IsEmpty]: Start isEmpty. Operand 8919 states and 23058 transitions. [2022-03-01 17:55:28,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-01 17:55:28,158 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:28,158 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:28,174 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-03-01 17:55:28,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2022-03-01 17:55:28,358 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:55:28,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:28,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1782953617, now seen corresponding path program 83 times [2022-03-01 17:55:28,359 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:28,359 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14216682] [2022-03-01 17:55:28,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:28,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:28,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:28,459 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:28,459 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:28,459 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14216682] [2022-03-01 17:55:28,459 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14216682] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:28,459 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111879147] [2022-03-01 17:55:28,459 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:55:28,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:28,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:28,464 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:28,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-01 17:55:28,500 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-01 17:55:28,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:28,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-01 17:55:28,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:28,771 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:28,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:29,063 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:29,063 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111879147] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:29,063 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:29,063 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 15] total 35 [2022-03-01 17:55:29,063 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271102832] [2022-03-01 17:55:29,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:29,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-01 17:55:29,063 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:29,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-01 17:55:29,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=982, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:55:29,064 INFO L87 Difference]: Start difference. First operand 8919 states and 23058 transitions. Second operand has 36 states, 36 states have (on average 2.4166666666666665) internal successors, (87), 35 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:31,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:31,783 INFO L93 Difference]: Finished difference Result 16714 states and 42009 transitions. [2022-03-01 17:55:31,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2022-03-01 17:55:31,787 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4166666666666665) internal successors, (87), 35 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-01 17:55:31,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:31,815 INFO L225 Difference]: With dead ends: 16714 [2022-03-01 17:55:31,815 INFO L226 Difference]: Without dead ends: 16698 [2022-03-01 17:55:31,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10728 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=6963, Invalid=18477, Unknown=0, NotChecked=0, Total=25440 [2022-03-01 17:55:31,818 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 871 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 871 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 1127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:31,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [871 Valid, 258 Invalid, 1127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 904 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:55:31,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16698 states. [2022-03-01 17:55:32,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16698 to 11626. [2022-03-01 17:55:32,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11626 states, 11625 states have (on average 2.584602150537634) internal successors, (30046), 11625 states have internal predecessors, (30046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:32,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11626 states to 11626 states and 30046 transitions. [2022-03-01 17:55:32,054 INFO L78 Accepts]: Start accepts. Automaton has 11626 states and 30046 transitions. Word has length 36 [2022-03-01 17:55:32,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:32,054 INFO L470 AbstractCegarLoop]: Abstraction has 11626 states and 30046 transitions. [2022-03-01 17:55:32,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.4166666666666665) internal successors, (87), 35 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:32,054 INFO L276 IsEmpty]: Start isEmpty. Operand 11626 states and 30046 transitions. [2022-03-01 17:55:32,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-01 17:55:32,063 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:32,063 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:32,079 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-03-01 17:55:32,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:32,263 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:55:32,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:32,296 INFO L85 PathProgramCache]: Analyzing trace with hash 399055535, now seen corresponding path program 84 times [2022-03-01 17:55:32,296 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:32,296 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528418068] [2022-03-01 17:55:32,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:32,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:32,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:32,402 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:32,402 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:32,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528418068] [2022-03-01 17:55:32,402 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528418068] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:32,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800209511] [2022-03-01 17:55:32,402 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:55:32,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:32,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:32,405 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:32,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-01 17:55:32,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-01 17:55:32,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:32,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-01 17:55:32,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:32,740 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:32,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:32,962 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:32,962 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800209511] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:32,962 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:32,962 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 15] total 34 [2022-03-01 17:55:32,962 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700570704] [2022-03-01 17:55:32,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:32,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-01 17:55:32,963 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:32,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-01 17:55:32,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=876, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:55:32,963 INFO L87 Difference]: Start difference. First operand 11626 states and 30046 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) [2022-03-01 17:55:34,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:34,272 INFO L93 Difference]: Finished difference Result 12191 states and 31159 transitions. [2022-03-01 17:55:34,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-01 17:55:34,273 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 [2022-03-01 17:55:34,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:34,291 INFO L225 Difference]: With dead ends: 12191 [2022-03-01 17:55:34,291 INFO L226 Difference]: Without dead ends: 12187 [2022-03-01 17:55:34,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2699 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2553, Invalid=6759, Unknown=0, NotChecked=0, Total=9312 [2022-03-01 17:55:34,293 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 231 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:34,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 111 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:55:34,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12187 states. [2022-03-01 17:55:34,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12187 to 11626. [2022-03-01 17:55:34,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11626 states, 11625 states have (on average 2.5839139784946235) internal successors, (30038), 11625 states have internal predecessors, (30038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:34,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11626 states to 11626 states and 30038 transitions. [2022-03-01 17:55:34,461 INFO L78 Accepts]: Start accepts. Automaton has 11626 states and 30038 transitions. Word has length 36 [2022-03-01 17:55:34,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:34,461 INFO L470 AbstractCegarLoop]: Abstraction has 11626 states and 30038 transitions. [2022-03-01 17:55:34,461 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) [2022-03-01 17:55:34,461 INFO L276 IsEmpty]: Start isEmpty. Operand 11626 states and 30038 transitions. [2022-03-01 17:55:34,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-01 17:55:34,470 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:34,470 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:34,485 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-03-01 17:55:34,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:34,670 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:55:34,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:34,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1668365135, now seen corresponding path program 85 times [2022-03-01 17:55:34,670 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:34,671 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739574035] [2022-03-01 17:55:34,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:34,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:34,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:34,762 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 39 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:55:34,762 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:34,762 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739574035] [2022-03-01 17:55:34,762 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739574035] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:34,762 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058286141] [2022-03-01 17:55:34,762 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:55:34,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:34,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:34,764 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:34,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-01 17:55:34,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:34,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-01 17:55:34,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:35,073 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:35,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:35,340 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:35,343 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058286141] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:35,343 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:35,343 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 15] total 34 [2022-03-01 17:55:35,343 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344941716] [2022-03-01 17:55:35,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:35,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-01 17:55:35,344 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:35,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-01 17:55:35,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=914, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:55:35,344 INFO L87 Difference]: Start difference. First operand 11626 states and 30038 transitions. Second operand has 35 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 34 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:36,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:36,932 INFO L93 Difference]: Finished difference Result 15216 states and 38818 transitions. [2022-03-01 17:55:36,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-01 17:55:36,932 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 34 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:55:36,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:36,955 INFO L225 Difference]: With dead ends: 15216 [2022-03-01 17:55:36,955 INFO L226 Difference]: Without dead ends: 15195 [2022-03-01 17:55:36,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3016 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2669, Invalid=7231, Unknown=0, NotChecked=0, Total=9900 [2022-03-01 17:55:36,956 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 319 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 1046 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 1203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:36,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 203 Invalid, 1203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1046 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:55:36,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15195 states. [2022-03-01 17:55:37,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15195 to 11850. [2022-03-01 17:55:37,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11850 states, 11849 states have (on average 2.593467803190143) internal successors, (30730), 11849 states have internal predecessors, (30730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:37,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11850 states to 11850 states and 30730 transitions. [2022-03-01 17:55:37,169 INFO L78 Accepts]: Start accepts. Automaton has 11850 states and 30730 transitions. Word has length 36 [2022-03-01 17:55:37,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:37,169 INFO L470 AbstractCegarLoop]: Abstraction has 11850 states and 30730 transitions. [2022-03-01 17:55:37,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 34 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:37,169 INFO L276 IsEmpty]: Start isEmpty. Operand 11850 states and 30730 transitions. [2022-03-01 17:55:37,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-01 17:55:37,178 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:37,178 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:37,194 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-03-01 17:55:37,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-03-01 17:55:37,379 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:55:37,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:37,379 INFO L85 PathProgramCache]: Analyzing trace with hash -528570047, now seen corresponding path program 86 times [2022-03-01 17:55:37,379 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:37,379 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061038912] [2022-03-01 17:55:37,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:37,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:37,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:37,478 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:37,478 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:37,478 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061038912] [2022-03-01 17:55:37,478 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061038912] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:37,478 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315600907] [2022-03-01 17:55:37,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:55:37,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:37,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:37,479 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:37,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-01 17:55:37,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:55:37,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:37,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-01 17:55:37,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:37,780 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:37,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:37,993 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:37,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315600907] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:37,994 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:37,994 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 15] total 34 [2022-03-01 17:55:37,994 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616912203] [2022-03-01 17:55:37,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:37,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-01 17:55:37,994 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:37,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-01 17:55:37,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=886, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:55:37,995 INFO L87 Difference]: Start difference. First operand 11850 states and 30730 transitions. Second operand has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:39,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:39,443 INFO L93 Difference]: Finished difference Result 13259 states and 33760 transitions. [2022-03-01 17:55:39,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-01 17:55:39,444 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-01 17:55:39,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:39,468 INFO L225 Difference]: With dead ends: 13259 [2022-03-01 17:55:39,468 INFO L226 Difference]: Without dead ends: 13241 [2022-03-01 17:55:39,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2858 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2558, Invalid=6948, Unknown=0, NotChecked=0, Total=9506 [2022-03-01 17:55:39,469 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 343 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:39,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 211 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:55:39,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13241 states. [2022-03-01 17:55:39,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13241 to 12104. [2022-03-01 17:55:39,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12104 states, 12103 states have (on average 2.5956374452615054) internal successors, (31415), 12103 states have internal predecessors, (31415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:39,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12104 states to 12104 states and 31415 transitions. [2022-03-01 17:55:39,663 INFO L78 Accepts]: Start accepts. Automaton has 12104 states and 31415 transitions. Word has length 36 [2022-03-01 17:55:39,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:39,663 INFO L470 AbstractCegarLoop]: Abstraction has 12104 states and 31415 transitions. [2022-03-01 17:55:39,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:39,663 INFO L276 IsEmpty]: Start isEmpty. Operand 12104 states and 31415 transitions. [2022-03-01 17:55:39,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-01 17:55:39,672 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:39,672 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:39,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-03-01 17:55:39,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:39,873 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:55:39,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:39,873 INFO L85 PathProgramCache]: Analyzing trace with hash -2092355907, now seen corresponding path program 87 times [2022-03-01 17:55:39,873 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:39,873 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523948042] [2022-03-01 17:55:39,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:39,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:39,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:39,974 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:39,974 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:39,975 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523948042] [2022-03-01 17:55:39,975 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523948042] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:39,975 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083136110] [2022-03-01 17:55:39,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:55:39,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:39,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:39,976 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:39,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-01 17:55:40,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-03-01 17:55:40,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:40,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-01 17:55:40,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:40,301 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:40,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:40,497 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:40,497 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083136110] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:40,497 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:40,498 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 15] total 34 [2022-03-01 17:55:40,498 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603746913] [2022-03-01 17:55:40,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:40,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-01 17:55:40,498 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:40,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-01 17:55:40,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=893, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:55:40,499 INFO L87 Difference]: Start difference. First operand 12104 states and 31415 transitions. Second operand has 35 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 34 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:41,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:41,960 INFO L93 Difference]: Finished difference Result 13923 states and 35275 transitions. [2022-03-01 17:55:41,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-01 17:55:41,960 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 34 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-01 17:55:41,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:41,984 INFO L225 Difference]: With dead ends: 13923 [2022-03-01 17:55:41,985 INFO L226 Difference]: Without dead ends: 13889 [2022-03-01 17:55:41,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3051 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2571, Invalid=7131, Unknown=0, NotChecked=0, Total=9702 [2022-03-01 17:55:41,985 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 296 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:41,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 237 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 810 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:55:41,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13889 states. [2022-03-01 17:55:42,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13889 to 11939. [2022-03-01 17:55:42,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11939 states, 11938 states have (on average 2.5983414307254145) internal successors, (31019), 11938 states have internal predecessors, (31019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:42,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11939 states to 11939 states and 31019 transitions. [2022-03-01 17:55:42,188 INFO L78 Accepts]: Start accepts. Automaton has 11939 states and 31019 transitions. Word has length 36 [2022-03-01 17:55:42,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:42,188 INFO L470 AbstractCegarLoop]: Abstraction has 11939 states and 31019 transitions. [2022-03-01 17:55:42,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 34 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:42,188 INFO L276 IsEmpty]: Start isEmpty. Operand 11939 states and 31019 transitions. [2022-03-01 17:55:42,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-01 17:55:42,197 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:42,197 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:42,213 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-03-01 17:55:42,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:42,398 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:55:42,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:42,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1652013767, now seen corresponding path program 88 times [2022-03-01 17:55:42,398 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:42,398 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543645535] [2022-03-01 17:55:42,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:42,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:42,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:42,505 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:42,505 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:42,505 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543645535] [2022-03-01 17:55:42,505 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543645535] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:42,505 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644756284] [2022-03-01 17:55:42,505 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:55:42,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:42,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:42,506 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:42,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-01 17:55:42,532 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:55:42,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:42,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-01 17:55:42,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:42,804 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:42,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:42,982 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:42,982 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644756284] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:42,982 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:42,982 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 34 [2022-03-01 17:55:42,982 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684250086] [2022-03-01 17:55:42,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:42,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-01 17:55:42,982 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:42,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-01 17:55:42,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=897, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:55:42,983 INFO L87 Difference]: Start difference. First operand 11939 states and 31019 transitions. Second operand has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:44,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:44,352 INFO L93 Difference]: Finished difference Result 14229 states and 35822 transitions. [2022-03-01 17:55:44,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-01 17:55:44,352 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-01 17:55:44,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:44,378 INFO L225 Difference]: With dead ends: 14229 [2022-03-01 17:55:44,378 INFO L226 Difference]: Without dead ends: 14185 [2022-03-01 17:55:44,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3211 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2592, Invalid=7308, Unknown=0, NotChecked=0, Total=9900 [2022-03-01 17:55:44,380 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 360 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:44,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 179 Invalid, 755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:55:44,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14185 states. [2022-03-01 17:55:44,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14185 to 11149. [2022-03-01 17:55:44,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11149 states, 11148 states have (on average 2.601184068891281) internal successors, (28998), 11148 states have internal predecessors, (28998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:44,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11149 states to 11149 states and 28998 transitions. [2022-03-01 17:55:44,651 INFO L78 Accepts]: Start accepts. Automaton has 11149 states and 28998 transitions. Word has length 36 [2022-03-01 17:55:44,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:44,651 INFO L470 AbstractCegarLoop]: Abstraction has 11149 states and 28998 transitions. [2022-03-01 17:55:44,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:44,651 INFO L276 IsEmpty]: Start isEmpty. Operand 11149 states and 28998 transitions. [2022-03-01 17:55:44,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-01 17:55:44,661 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:44,661 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:44,678 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-03-01 17:55:44,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:44,861 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:55:44,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:44,862 INFO L85 PathProgramCache]: Analyzing trace with hash 609987765, now seen corresponding path program 89 times [2022-03-01 17:55:44,862 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:44,862 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204012406] [2022-03-01 17:55:44,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:44,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:44,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:44,962 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:44,963 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:44,963 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204012406] [2022-03-01 17:55:44,963 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204012406] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:44,963 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351816729] [2022-03-01 17:55:44,963 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:55:44,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:44,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:44,964 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:44,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-01 17:55:44,990 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-03-01 17:55:44,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:44,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-01 17:55:44,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:45,268 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:45,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:45,435 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:45,435 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351816729] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:45,435 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:45,435 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 34 [2022-03-01 17:55:45,435 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291808046] [2022-03-01 17:55:45,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:45,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-01 17:55:45,435 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:45,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-01 17:55:45,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:55:45,436 INFO L87 Difference]: Start difference. First operand 11149 states and 28998 transitions. Second operand has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:46,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:46,788 INFO L93 Difference]: Finished difference Result 13990 states and 34960 transitions. [2022-03-01 17:55:46,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-01 17:55:46,789 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-01 17:55:46,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:46,808 INFO L225 Difference]: With dead ends: 13990 [2022-03-01 17:55:46,808 INFO L226 Difference]: Without dead ends: 13948 [2022-03-01 17:55:46,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3319 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2621, Invalid=7479, Unknown=0, NotChecked=0, Total=10100 [2022-03-01 17:55:46,810 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 403 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:46,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [403 Valid, 166 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:55:46,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13948 states. [2022-03-01 17:55:46,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13948 to 9962. [2022-03-01 17:55:47,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9962 states, 9961 states have (on average 2.597731151490814) internal successors, (25876), 9961 states have internal predecessors, (25876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:47,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9962 states to 9962 states and 25876 transitions. [2022-03-01 17:55:47,028 INFO L78 Accepts]: Start accepts. Automaton has 9962 states and 25876 transitions. Word has length 36 [2022-03-01 17:55:47,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:47,029 INFO L470 AbstractCegarLoop]: Abstraction has 9962 states and 25876 transitions. [2022-03-01 17:55:47,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:47,029 INFO L276 IsEmpty]: Start isEmpty. Operand 9962 states and 25876 transitions. [2022-03-01 17:55:47,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-01 17:55:47,036 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:47,036 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:47,052 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-03-01 17:55:47,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2022-03-01 17:55:47,236 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:55:47,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:47,237 INFO L85 PathProgramCache]: Analyzing trace with hash -759696523, now seen corresponding path program 90 times [2022-03-01 17:55:47,237 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:47,237 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796958482] [2022-03-01 17:55:47,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:47,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:47,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:47,351 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:55:47,351 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:47,351 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796958482] [2022-03-01 17:55:47,351 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796958482] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:47,351 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575891568] [2022-03-01 17:55:47,351 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:55:47,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:47,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:47,352 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:47,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-01 17:55:47,379 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-01 17:55:47,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:47,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-01 17:55:47,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:47,659 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:47,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:47,840 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:47,840 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575891568] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:47,840 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:47,840 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 35 [2022-03-01 17:55:47,840 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284877983] [2022-03-01 17:55:47,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:47,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-01 17:55:47,841 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:47,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-01 17:55:47,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=1010, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:55:47,841 INFO L87 Difference]: Start difference. First operand 9962 states and 25876 transitions. Second operand has 36 states, 36 states have (on average 2.3055555555555554) internal successors, (83), 35 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:49,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:49,877 INFO L93 Difference]: Finished difference Result 12761 states and 31459 transitions. [2022-03-01 17:55:49,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-01 17:55:49,877 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.3055555555555554) internal successors, (83), 35 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-01 17:55:49,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:49,897 INFO L225 Difference]: With dead ends: 12761 [2022-03-01 17:55:49,897 INFO L226 Difference]: Without dead ends: 12761 [2022-03-01 17:55:49,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4585 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3550, Invalid=10730, Unknown=0, NotChecked=0, Total=14280 [2022-03-01 17:55:49,899 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 392 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 1153 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 1267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:49,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [392 Valid, 335 Invalid, 1267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1153 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:55:49,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12761 states. [2022-03-01 17:55:50,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12761 to 8944. [2022-03-01 17:55:50,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8944 states, 8943 states have (on average 2.5896231689589624) internal successors, (23159), 8943 states have internal predecessors, (23159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:50,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8944 states to 8944 states and 23159 transitions. [2022-03-01 17:55:50,096 INFO L78 Accepts]: Start accepts. Automaton has 8944 states and 23159 transitions. Word has length 36 [2022-03-01 17:55:50,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:50,096 INFO L470 AbstractCegarLoop]: Abstraction has 8944 states and 23159 transitions. [2022-03-01 17:55:50,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.3055555555555554) internal successors, (83), 35 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:50,096 INFO L276 IsEmpty]: Start isEmpty. Operand 8944 states and 23159 transitions. [2022-03-01 17:55:50,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-01 17:55:50,103 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:50,103 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:50,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-03-01 17:55:50,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:50,303 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:55:50,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:50,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1478431567, now seen corresponding path program 91 times [2022-03-01 17:55:50,304 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:50,304 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240365886] [2022-03-01 17:55:50,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:50,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:50,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:50,426 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:55:50,426 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:50,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240365886] [2022-03-01 17:55:50,426 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240365886] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:50,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87175713] [2022-03-01 17:55:50,426 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:55:50,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:50,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:50,428 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:50,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-01 17:55:50,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:50,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-01 17:55:50,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:50,737 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:50,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:50,912 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:50,912 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87175713] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:50,912 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:50,912 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 34 [2022-03-01 17:55:50,912 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510553195] [2022-03-01 17:55:50,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:50,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-01 17:55:50,912 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:50,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-01 17:55:50,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=908, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:55:50,913 INFO L87 Difference]: Start difference. First operand 8944 states and 23159 transitions. Second operand has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:52,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:52,484 INFO L93 Difference]: Finished difference Result 10626 states and 26434 transitions. [2022-03-01 17:55:52,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-01 17:55:52,485 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-01 17:55:52,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:52,500 INFO L225 Difference]: With dead ends: 10626 [2022-03-01 17:55:52,500 INFO L226 Difference]: Without dead ends: 10527 [2022-03-01 17:55:52,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3546 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2616, Invalid=8304, Unknown=0, NotChecked=0, Total=10920 [2022-03-01 17:55:52,502 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 503 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:52,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [503 Valid, 233 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:55:52,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10527 states. [2022-03-01 17:55:52,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10527 to 8656. [2022-03-01 17:55:52,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8656 states, 8655 states have (on average 2.577007510109763) internal successors, (22304), 8655 states have internal predecessors, (22304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:52,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8656 states to 8656 states and 22304 transitions. [2022-03-01 17:55:52,647 INFO L78 Accepts]: Start accepts. Automaton has 8656 states and 22304 transitions. Word has length 36 [2022-03-01 17:55:52,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:52,648 INFO L470 AbstractCegarLoop]: Abstraction has 8656 states and 22304 transitions. [2022-03-01 17:55:52,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:52,648 INFO L276 IsEmpty]: Start isEmpty. Operand 8656 states and 22304 transitions. [2022-03-01 17:55:52,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-01 17:55:52,654 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:52,654 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:52,669 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-03-01 17:55:52,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:52,854 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:55:52,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:52,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1608257675, now seen corresponding path program 92 times [2022-03-01 17:55:52,855 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:52,855 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844487769] [2022-03-01 17:55:52,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:52,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:52,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:52,966 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 23 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:55:52,966 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:52,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844487769] [2022-03-01 17:55:52,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844487769] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:52,967 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751095692] [2022-03-01 17:55:52,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:55:52,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:52,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:52,968 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:52,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-01 17:55:52,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:55:52,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:52,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-01 17:55:52,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:53,302 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:53,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:53,500 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:53,500 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751095692] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:53,500 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:53,500 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 35 [2022-03-01 17:55:53,500 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257021348] [2022-03-01 17:55:53,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:53,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-01 17:55:53,501 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:53,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-01 17:55:53,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1008, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:55:53,501 INFO L87 Difference]: Start difference. First operand 8656 states and 22304 transitions. Second operand has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:55,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:55,618 INFO L93 Difference]: Finished difference Result 12072 states and 29459 transitions. [2022-03-01 17:55:55,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-03-01 17:55:55,618 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-01 17:55:55,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:55,635 INFO L225 Difference]: With dead ends: 12072 [2022-03-01 17:55:55,635 INFO L226 Difference]: Without dead ends: 12072 [2022-03-01 17:55:55,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5867 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4278, Invalid=11978, Unknown=0, NotChecked=0, Total=16256 [2022-03-01 17:55:55,638 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 495 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 1016 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 1166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 1016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:55,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [495 Valid, 309 Invalid, 1166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 1016 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:55:55,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12072 states. [2022-03-01 17:55:55,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12072 to 7769. [2022-03-01 17:55:55,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7769 states, 7768 states have (on average 2.5607621009268797) internal successors, (19892), 7768 states have internal predecessors, (19892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:55,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7769 states to 7769 states and 19892 transitions. [2022-03-01 17:55:55,764 INFO L78 Accepts]: Start accepts. Automaton has 7769 states and 19892 transitions. Word has length 36 [2022-03-01 17:55:55,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:55,764 INFO L470 AbstractCegarLoop]: Abstraction has 7769 states and 19892 transitions. [2022-03-01 17:55:55,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:55,764 INFO L276 IsEmpty]: Start isEmpty. Operand 7769 states and 19892 transitions. [2022-03-01 17:55:55,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-01 17:55:55,770 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:55,770 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:55,785 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-03-01 17:55:55,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:55,970 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:55:55,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:55,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1349650353, now seen corresponding path program 93 times [2022-03-01 17:55:55,971 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:55,971 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438325551] [2022-03-01 17:55:55,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:55,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:55,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:56,065 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 23 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:55:56,065 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:56,065 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438325551] [2022-03-01 17:55:56,065 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438325551] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:56,065 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345968562] [2022-03-01 17:55:56,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:55:56,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:56,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:56,067 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:56,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-01 17:55:56,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-01 17:55:56,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:56,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-01 17:55:56,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:56,370 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:56,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:56,558 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:56,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345968562] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:56,558 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:56,559 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 34 [2022-03-01 17:55:56,559 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771010843] [2022-03-01 17:55:56,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:56,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-01 17:55:56,559 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:56,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-01 17:55:56,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=906, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:55:56,559 INFO L87 Difference]: Start difference. First operand 7769 states and 19892 transitions. Second operand has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:57,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:57,968 INFO L93 Difference]: Finished difference Result 9358 states and 23204 transitions. [2022-03-01 17:55:57,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-01 17:55:57,968 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-01 17:55:57,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:57,981 INFO L225 Difference]: With dead ends: 9358 [2022-03-01 17:55:57,981 INFO L226 Difference]: Without dead ends: 9292 [2022-03-01 17:55:57,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3140 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2308, Invalid=7198, Unknown=0, NotChecked=0, Total=9506 [2022-03-01 17:55:57,983 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 401 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:57,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [401 Valid, 290 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 857 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:55:57,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9292 states. [2022-03-01 17:55:58,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9292 to 7746. [2022-03-01 17:55:58,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7746 states, 7745 states have (on average 2.5536475145255) internal successors, (19778), 7745 states have internal predecessors, (19778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:58,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7746 states to 7746 states and 19778 transitions. [2022-03-01 17:55:58,108 INFO L78 Accepts]: Start accepts. Automaton has 7746 states and 19778 transitions. Word has length 36 [2022-03-01 17:55:58,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:58,108 INFO L470 AbstractCegarLoop]: Abstraction has 7746 states and 19778 transitions. [2022-03-01 17:55:58,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:58,109 INFO L276 IsEmpty]: Start isEmpty. Operand 7746 states and 19778 transitions. [2022-03-01 17:55:58,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-01 17:55:58,114 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:58,114 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:55:58,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-03-01 17:55:58,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:58,315 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:55:58,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:58,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1872827531, now seen corresponding path program 94 times [2022-03-01 17:55:58,315 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:58,315 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557390348] [2022-03-01 17:55:58,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:58,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:58,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:58,417 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:55:58,417 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:58,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557390348] [2022-03-01 17:55:58,417 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557390348] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:58,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805494396] [2022-03-01 17:55:58,417 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:55:58,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:58,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:58,419 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:58,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-01 17:55:58,444 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:55:58,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:58,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-01 17:55:58,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:58,735 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:58,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:58,949 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:58,949 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805494396] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:58,950 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:58,950 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 35 [2022-03-01 17:55:58,950 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590687390] [2022-03-01 17:55:58,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:58,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-01 17:55:58,950 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:58,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-01 17:55:58,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1001, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:55:58,951 INFO L87 Difference]: Start difference. First operand 7746 states and 19778 transitions. Second operand has 36 states, 36 states have (on average 2.4166666666666665) internal successors, (87), 35 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:01,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:01,422 INFO L93 Difference]: Finished difference Result 11687 states and 28283 transitions. [2022-03-01 17:56:01,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-03-01 17:56:01,423 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4166666666666665) internal successors, (87), 35 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-01 17:56:01,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:01,441 INFO L225 Difference]: With dead ends: 11687 [2022-03-01 17:56:01,441 INFO L226 Difference]: Without dead ends: 11687 [2022-03-01 17:56:01,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7992 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5519, Invalid=14221, Unknown=0, NotChecked=0, Total=19740 [2022-03-01 17:56:01,443 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 517 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 1173 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 1173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:01,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 339 Invalid, 1334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 1173 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:56:01,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11687 states. [2022-03-01 17:56:01,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11687 to 7094. [2022-03-01 17:56:01,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7094 states, 7093 states have (on average 2.531791907514451) internal successors, (17958), 7093 states have internal predecessors, (17958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:01,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7094 states to 7094 states and 17958 transitions. [2022-03-01 17:56:01,583 INFO L78 Accepts]: Start accepts. Automaton has 7094 states and 17958 transitions. Word has length 36 [2022-03-01 17:56:01,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:01,583 INFO L470 AbstractCegarLoop]: Abstraction has 7094 states and 17958 transitions. [2022-03-01 17:56:01,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.4166666666666665) internal successors, (87), 35 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:01,583 INFO L276 IsEmpty]: Start isEmpty. Operand 7094 states and 17958 transitions. [2022-03-01 17:56:01,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-01 17:56:01,588 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:01,588 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:01,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-03-01 17:56:01,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2022-03-01 17:56:01,789 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:56:01,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:01,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1869749583, now seen corresponding path program 95 times [2022-03-01 17:56:01,789 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:01,789 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997418478] [2022-03-01 17:56:01,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:01,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:01,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:01,885 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 23 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:56:01,885 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:01,885 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997418478] [2022-03-01 17:56:01,885 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997418478] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:01,885 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691710943] [2022-03-01 17:56:01,885 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:56:01,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:01,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:01,886 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:01,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-01 17:56:01,910 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-01 17:56:01,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:01,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-01 17:56:01,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:02,182 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:02,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:02,378 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:02,378 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691710943] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:02,378 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:02,378 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 15] total 34 [2022-03-01 17:56:02,378 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030959404] [2022-03-01 17:56:02,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:02,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-01 17:56:02,379 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:02,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-01 17:56:02,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=901, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:56:02,379 INFO L87 Difference]: Start difference. First operand 7094 states and 17958 transitions. Second operand has 35 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 34 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:03,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:03,613 INFO L93 Difference]: Finished difference Result 8391 states and 20772 transitions. [2022-03-01 17:56:03,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-01 17:56:03,613 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 34 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-01 17:56:03,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:03,624 INFO L225 Difference]: With dead ends: 8391 [2022-03-01 17:56:03,624 INFO L226 Difference]: Without dead ends: 8352 [2022-03-01 17:56:03,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2815 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2137, Invalid=6419, Unknown=0, NotChecked=0, Total=8556 [2022-03-01 17:56:03,626 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 336 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:03,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 232 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:56:03,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8352 states. [2022-03-01 17:56:03,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8352 to 7183. [2022-03-01 17:56:03,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7183 states, 7182 states have (on average 2.532442216652743) internal successors, (18188), 7182 states have internal predecessors, (18188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:03,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7183 states to 7183 states and 18188 transitions. [2022-03-01 17:56:03,753 INFO L78 Accepts]: Start accepts. Automaton has 7183 states and 18188 transitions. Word has length 36 [2022-03-01 17:56:03,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:03,753 INFO L470 AbstractCegarLoop]: Abstraction has 7183 states and 18188 transitions. [2022-03-01 17:56:03,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 34 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:03,753 INFO L276 IsEmpty]: Start isEmpty. Operand 7183 states and 18188 transitions. [2022-03-01 17:56:03,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-01 17:56:03,758 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:03,758 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:03,774 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-03-01 17:56:03,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-03-01 17:56:03,959 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:56:03,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:03,959 INFO L85 PathProgramCache]: Analyzing trace with hash 187230069, now seen corresponding path program 96 times [2022-03-01 17:56:03,959 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:03,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106748352] [2022-03-01 17:56:03,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:03,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:03,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:04,063 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:56:04,063 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:04,064 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106748352] [2022-03-01 17:56:04,064 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106748352] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:04,064 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396195650] [2022-03-01 17:56:04,064 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:56:04,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:04,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:04,065 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:04,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-03-01 17:56:04,095 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-01 17:56:04,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:04,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-01 17:56:04,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:04,370 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:04,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:04,613 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:04,614 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396195650] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:04,614 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:04,614 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 15] total 35 [2022-03-01 17:56:04,614 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402907111] [2022-03-01 17:56:04,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:04,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-01 17:56:04,614 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:04,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-01 17:56:04,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=989, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:56:04,615 INFO L87 Difference]: Start difference. First operand 7183 states and 18188 transitions. Second operand has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:07,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:07,356 INFO L93 Difference]: Finished difference Result 12422 states and 29912 transitions. [2022-03-01 17:56:07,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-03-01 17:56:07,357 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-01 17:56:07,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:07,412 INFO L225 Difference]: With dead ends: 12422 [2022-03-01 17:56:07,412 INFO L226 Difference]: Without dead ends: 12422 [2022-03-01 17:56:07,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10582 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=6986, Invalid=17194, Unknown=0, NotChecked=0, Total=24180 [2022-03-01 17:56:07,413 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 673 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 673 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 1225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 1036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:07,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [673 Valid, 279 Invalid, 1225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 1036 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:56:07,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12422 states. [2022-03-01 17:56:07,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12422 to 8770. [2022-03-01 17:56:07,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8770 states, 8769 states have (on average 2.5070133424563803) internal successors, (21984), 8769 states have internal predecessors, (21984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:07,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8770 states to 8770 states and 21984 transitions. [2022-03-01 17:56:07,558 INFO L78 Accepts]: Start accepts. Automaton has 8770 states and 21984 transitions. Word has length 36 [2022-03-01 17:56:07,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:07,559 INFO L470 AbstractCegarLoop]: Abstraction has 8770 states and 21984 transitions. [2022-03-01 17:56:07,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:07,559 INFO L276 IsEmpty]: Start isEmpty. Operand 8770 states and 21984 transitions. [2022-03-01 17:56:07,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-01 17:56:07,565 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:07,565 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:07,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-03-01 17:56:07,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-03-01 17:56:07,766 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:56:07,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:07,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1273265585, now seen corresponding path program 97 times [2022-03-01 17:56:07,766 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:07,766 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115387550] [2022-03-01 17:56:07,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:07,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:07,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:07,851 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:56:07,851 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:07,851 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115387550] [2022-03-01 17:56:07,851 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115387550] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:07,851 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983571670] [2022-03-01 17:56:07,851 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:56:07,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:07,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:07,852 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:07,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-03-01 17:56:07,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:07,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-01 17:56:07,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:08,151 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:08,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:08,360 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:08,360 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983571670] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:08,360 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:08,360 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 15] total 34 [2022-03-01 17:56:08,360 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602678366] [2022-03-01 17:56:08,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:08,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-01 17:56:08,360 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:08,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-01 17:56:08,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=893, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:56:08,361 INFO L87 Difference]: Start difference. First operand 8770 states and 21984 transitions. Second operand has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:09,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:09,630 INFO L93 Difference]: Finished difference Result 9544 states and 23558 transitions. [2022-03-01 17:56:09,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-01 17:56:09,631 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-01 17:56:09,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:09,643 INFO L225 Difference]: With dead ends: 9544 [2022-03-01 17:56:09,644 INFO L226 Difference]: Without dead ends: 9526 [2022-03-01 17:56:09,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2590 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2065, Invalid=5945, Unknown=0, NotChecked=0, Total=8010 [2022-03-01 17:56:09,645 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 226 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 968 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:09,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 260 Invalid, 1032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 968 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:56:09,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9526 states. [2022-03-01 17:56:09,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9526 to 8902. [2022-03-01 17:56:09,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8902 states, 8901 states have (on average 2.510055049994383) internal successors, (22342), 8901 states have internal predecessors, (22342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:09,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8902 states to 8902 states and 22342 transitions. [2022-03-01 17:56:09,809 INFO L78 Accepts]: Start accepts. Automaton has 8902 states and 22342 transitions. Word has length 36 [2022-03-01 17:56:09,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:09,809 INFO L470 AbstractCegarLoop]: Abstraction has 8902 states and 22342 transitions. [2022-03-01 17:56:09,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:09,809 INFO L276 IsEmpty]: Start isEmpty. Operand 8902 states and 22342 transitions. [2022-03-01 17:56:09,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-01 17:56:09,815 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:09,815 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:09,831 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-03-01 17:56:10,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:10,015 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:56:10,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:10,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1749148533, now seen corresponding path program 98 times [2022-03-01 17:56:10,016 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:10,016 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483717798] [2022-03-01 17:56:10,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:10,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:10,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:10,112 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:56:10,112 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:10,112 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483717798] [2022-03-01 17:56:10,112 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483717798] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:10,112 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703628491] [2022-03-01 17:56:10,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:56:10,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:10,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:10,114 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:10,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-03-01 17:56:10,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:56:10,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:10,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-01 17:56:10,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:10,420 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:10,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:10,679 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:10,680 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703628491] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:10,680 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:10,680 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 15] total 35 [2022-03-01 17:56:10,680 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666629459] [2022-03-01 17:56:10,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:10,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-01 17:56:10,680 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:10,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-01 17:56:10,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=972, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:56:10,680 INFO L87 Difference]: Start difference. First operand 8902 states and 22342 transitions. Second operand has 36 states, 36 states have (on average 2.5555555555555554) internal successors, (92), 35 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:13,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:13,731 INFO L93 Difference]: Finished difference Result 15970 states and 39092 transitions. [2022-03-01 17:56:13,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2022-03-01 17:56:13,731 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5555555555555554) internal successors, (92), 35 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-01 17:56:13,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:13,755 INFO L225 Difference]: With dead ends: 15970 [2022-03-01 17:56:13,755 INFO L226 Difference]: Without dead ends: 15970 [2022-03-01 17:56:13,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13560 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=8543, Invalid=21559, Unknown=0, NotChecked=0, Total=30102 [2022-03-01 17:56:13,804 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 735 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 977 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 735 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 1163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:13,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [735 Valid, 253 Invalid, 1163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 977 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:56:13,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15970 states. [2022-03-01 17:56:13,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15970 to 13330. [2022-03-01 17:56:14,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13330 states, 13329 states have (on average 2.5292219971490733) internal successors, (33712), 13329 states have internal predecessors, (33712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:14,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13330 states to 13330 states and 33712 transitions. [2022-03-01 17:56:14,025 INFO L78 Accepts]: Start accepts. Automaton has 13330 states and 33712 transitions. Word has length 36 [2022-03-01 17:56:14,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:14,025 INFO L470 AbstractCegarLoop]: Abstraction has 13330 states and 33712 transitions. [2022-03-01 17:56:14,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.5555555555555554) internal successors, (92), 35 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:14,025 INFO L276 IsEmpty]: Start isEmpty. Operand 13330 states and 33712 transitions. [2022-03-01 17:56:14,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-01 17:56:14,034 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:14,034 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:14,049 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-03-01 17:56:14,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-03-01 17:56:14,234 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:56:14,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:14,235 INFO L85 PathProgramCache]: Analyzing trace with hash -196872101, now seen corresponding path program 99 times [2022-03-01 17:56:14,235 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:14,235 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646821984] [2022-03-01 17:56:14,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:14,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:14,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:14,315 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:56:14,315 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:14,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646821984] [2022-03-01 17:56:14,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646821984] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:14,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349921552] [2022-03-01 17:56:14,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:56:14,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:14,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:14,316 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:14,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-03-01 17:56:14,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-01 17:56:14,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:14,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-01 17:56:14,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:14,610 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:14,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:14,861 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 32 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:14,861 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349921552] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:14,861 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:14,861 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 15] total 34 [2022-03-01 17:56:14,862 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577940695] [2022-03-01 17:56:14,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:14,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-01 17:56:14,862 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:14,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-01 17:56:14,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=900, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:56:14,862 INFO L87 Difference]: Start difference. First operand 13330 states and 33712 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) [2022-03-01 17:56:16,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:16,860 INFO L93 Difference]: Finished difference Result 14924 states and 36958 transitions. [2022-03-01 17:56:16,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-03-01 17:56:16,861 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 [2022-03-01 17:56:16,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:16,885 INFO L225 Difference]: With dead ends: 14924 [2022-03-01 17:56:16,885 INFO L226 Difference]: Without dead ends: 14920 [2022-03-01 17:56:16,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5124 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4135, Invalid=10627, Unknown=0, NotChecked=0, Total=14762 [2022-03-01 17:56:16,886 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 547 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:16,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [547 Valid, 120 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:56:16,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14920 states. [2022-03-01 17:56:17,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14920 to 13086. [2022-03-01 17:56:17,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13086 states, 13085 states have (on average 2.525792892625143) internal successors, (33050), 13085 states have internal predecessors, (33050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:17,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13086 states to 13086 states and 33050 transitions. [2022-03-01 17:56:17,124 INFO L78 Accepts]: Start accepts. Automaton has 13086 states and 33050 transitions. Word has length 36 [2022-03-01 17:56:17,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:17,124 INFO L470 AbstractCegarLoop]: Abstraction has 13086 states and 33050 transitions. [2022-03-01 17:56:17,124 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) [2022-03-01 17:56:17,124 INFO L276 IsEmpty]: Start isEmpty. Operand 13086 states and 33050 transitions. [2022-03-01 17:56:17,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-01 17:56:17,132 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:17,132 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:17,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-03-01 17:56:17,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-03-01 17:56:17,333 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:56:17,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:17,333 INFO L85 PathProgramCache]: Analyzing trace with hash -703218367, now seen corresponding path program 100 times [2022-03-01 17:56:17,333 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:17,334 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380462684] [2022-03-01 17:56:17,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:17,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:17,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:17,420 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 26 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:56:17,421 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:17,421 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380462684] [2022-03-01 17:56:17,421 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380462684] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:17,421 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035932091] [2022-03-01 17:56:17,421 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:56:17,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:17,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:17,422 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:17,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-03-01 17:56:17,445 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:56:17,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:17,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-01 17:56:17,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:17,718 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 23 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:17,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:17,958 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 32 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:17,958 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035932091] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:17,958 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:17,958 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 15] total 34 [2022-03-01 17:56:17,958 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081131058] [2022-03-01 17:56:17,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:17,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-01 17:56:17,959 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:17,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-01 17:56:17,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=902, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:56:17,959 INFO L87 Difference]: Start difference. First operand 13086 states and 33050 transitions. Second operand has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:19,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:19,759 INFO L93 Difference]: Finished difference Result 15282 states and 37884 transitions. [2022-03-01 17:56:19,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-01 17:56:19,759 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-01 17:56:19,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:19,782 INFO L225 Difference]: With dead ends: 15282 [2022-03-01 17:56:19,783 INFO L226 Difference]: Without dead ends: 15270 [2022-03-01 17:56:19,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4339 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3530, Invalid=9352, Unknown=0, NotChecked=0, Total=12882 [2022-03-01 17:56:19,784 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 447 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:19,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [447 Valid, 138 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:56:19,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15270 states. [2022-03-01 17:56:19,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15270 to 13017. [2022-03-01 17:56:19,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13017 states, 13016 states have (on average 2.528272894898586) internal successors, (32908), 13016 states have internal predecessors, (32908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:20,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13017 states to 13017 states and 32908 transitions. [2022-03-01 17:56:20,024 INFO L78 Accepts]: Start accepts. Automaton has 13017 states and 32908 transitions. Word has length 36 [2022-03-01 17:56:20,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:20,024 INFO L470 AbstractCegarLoop]: Abstraction has 13017 states and 32908 transitions. [2022-03-01 17:56:20,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:20,024 INFO L276 IsEmpty]: Start isEmpty. Operand 13017 states and 32908 transitions. [2022-03-01 17:56:20,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-01 17:56:20,032 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:20,032 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:20,048 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-03-01 17:56:20,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:20,233 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:56:20,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:20,233 INFO L85 PathProgramCache]: Analyzing trace with hash -930439747, now seen corresponding path program 101 times [2022-03-01 17:56:20,233 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:20,233 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723641662] [2022-03-01 17:56:20,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:20,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:20,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:20,340 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:56:20,340 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:20,340 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723641662] [2022-03-01 17:56:20,341 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723641662] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:20,341 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239413358] [2022-03-01 17:56:20,341 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:56:20,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:20,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:20,342 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:20,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-03-01 17:56:20,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-01 17:56:20,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:20,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-01 17:56:20,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:20,639 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 19 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:20,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:20,851 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 33 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:20,851 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239413358] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:20,851 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:20,851 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 15] total 34 [2022-03-01 17:56:20,851 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886704924] [2022-03-01 17:56:20,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:20,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-01 17:56:20,852 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:20,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-01 17:56:20,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=902, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:56:20,852 INFO L87 Difference]: Start difference. First operand 13017 states and 32908 transitions. Second operand has 35 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 34 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:22,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:22,520 INFO L93 Difference]: Finished difference Result 16039 states and 39737 transitions. [2022-03-01 17:56:22,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-01 17:56:22,520 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 34 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-01 17:56:22,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:22,546 INFO L225 Difference]: With dead ends: 16039 [2022-03-01 17:56:22,546 INFO L226 Difference]: Without dead ends: 16019 [2022-03-01 17:56:22,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3839 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3172, Invalid=8600, Unknown=0, NotChecked=0, Total=11772 [2022-03-01 17:56:22,547 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 447 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:22,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [447 Valid, 154 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:56:22,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16019 states. [2022-03-01 17:56:22,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16019 to 13397. [2022-03-01 17:56:22,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13397 states, 13396 states have (on average 2.5326216781128696) internal successors, (33927), 13396 states have internal predecessors, (33927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:22,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13397 states to 13397 states and 33927 transitions. [2022-03-01 17:56:22,780 INFO L78 Accepts]: Start accepts. Automaton has 13397 states and 33927 transitions. Word has length 36 [2022-03-01 17:56:22,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:22,780 INFO L470 AbstractCegarLoop]: Abstraction has 13397 states and 33927 transitions. [2022-03-01 17:56:22,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 34 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:22,781 INFO L276 IsEmpty]: Start isEmpty. Operand 13397 states and 33927 transitions. [2022-03-01 17:56:22,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-01 17:56:22,792 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:22,792 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:22,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-03-01 17:56:23,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:23,007 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:56:23,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:23,008 INFO L85 PathProgramCache]: Analyzing trace with hash -246853831, now seen corresponding path program 102 times [2022-03-01 17:56:23,008 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:23,008 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131941850] [2022-03-01 17:56:23,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:23,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:23,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:23,103 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:56:23,103 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:23,103 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131941850] [2022-03-01 17:56:23,103 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131941850] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:23,103 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107521726] [2022-03-01 17:56:23,103 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:56:23,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:23,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:23,105 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:23,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-03-01 17:56:23,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-01 17:56:23,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:23,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-01 17:56:23,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:23,406 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 19 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:23,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:23,602 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 34 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:23,602 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107521726] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:23,602 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:23,602 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 34 [2022-03-01 17:56:23,602 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939290564] [2022-03-01 17:56:23,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:23,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-01 17:56:23,603 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:23,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-01 17:56:23,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=901, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:56:23,603 INFO L87 Difference]: Start difference. First operand 13397 states and 33927 transitions. Second operand has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:25,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:25,222 INFO L93 Difference]: Finished difference Result 17468 states and 43250 transitions. [2022-03-01 17:56:25,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-01 17:56:25,223 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-01 17:56:25,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:25,251 INFO L225 Difference]: With dead ends: 17468 [2022-03-01 17:56:25,251 INFO L226 Difference]: Without dead ends: 17440 [2022-03-01 17:56:25,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3628 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3021, Invalid=8321, Unknown=0, NotChecked=0, Total=11342 [2022-03-01 17:56:25,252 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 539 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:25,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [539 Valid, 146 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:56:25,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17440 states. [2022-03-01 17:56:25,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17440 to 15583. [2022-03-01 17:56:25,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15583 states, 15582 states have (on average 2.5360672570915157) internal successors, (39517), 15582 states have internal predecessors, (39517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:25,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15583 states to 15583 states and 39517 transitions. [2022-03-01 17:56:25,570 INFO L78 Accepts]: Start accepts. Automaton has 15583 states and 39517 transitions. Word has length 36 [2022-03-01 17:56:25,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:25,570 INFO L470 AbstractCegarLoop]: Abstraction has 15583 states and 39517 transitions. [2022-03-01 17:56:25,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:25,570 INFO L276 IsEmpty]: Start isEmpty. Operand 15583 states and 39517 transitions. [2022-03-01 17:56:25,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-01 17:56:25,583 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:25,583 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:25,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-03-01 17:56:25,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2022-03-01 17:56:25,806 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:56:25,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:25,807 INFO L85 PathProgramCache]: Analyzing trace with hash -450784843, now seen corresponding path program 103 times [2022-03-01 17:56:25,807 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:25,807 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156174673] [2022-03-01 17:56:25,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:25,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:25,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:25,907 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 23 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:56:25,907 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:25,907 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156174673] [2022-03-01 17:56:25,907 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156174673] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:25,907 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049126495] [2022-03-01 17:56:25,907 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:56:25,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:25,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:25,908 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:25,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-03-01 17:56:25,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:25,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-01 17:56:25,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:26,214 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 23 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:26,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:26,390 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 35 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:26,390 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049126495] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:26,390 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:26,390 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 34 [2022-03-01 17:56:26,390 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300085784] [2022-03-01 17:56:26,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:26,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-01 17:56:26,391 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:26,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-01 17:56:26,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:56:26,391 INFO L87 Difference]: Start difference. First operand 15583 states and 39517 transitions. Second operand has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:28,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:28,023 INFO L93 Difference]: Finished difference Result 20026 states and 49571 transitions. [2022-03-01 17:56:28,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-01 17:56:28,024 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-01 17:56:28,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:28,057 INFO L225 Difference]: With dead ends: 20026 [2022-03-01 17:56:28,057 INFO L226 Difference]: Without dead ends: 19990 [2022-03-01 17:56:28,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3723 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3034, Invalid=8522, Unknown=0, NotChecked=0, Total=11556 [2022-03-01 17:56:28,058 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 600 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:28,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [600 Valid, 132 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:56:28,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19990 states. [2022-03-01 17:56:28,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19990 to 17983. [2022-03-01 17:56:28,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17983 states, 17982 states have (on average 2.533644755866978) internal successors, (45560), 17982 states have internal predecessors, (45560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:28,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17983 states to 17983 states and 45560 transitions. [2022-03-01 17:56:28,402 INFO L78 Accepts]: Start accepts. Automaton has 17983 states and 45560 transitions. Word has length 36 [2022-03-01 17:56:28,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:28,402 INFO L470 AbstractCegarLoop]: Abstraction has 17983 states and 45560 transitions. [2022-03-01 17:56:28,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:28,403 INFO L276 IsEmpty]: Start isEmpty. Operand 17983 states and 45560 transitions. [2022-03-01 17:56:28,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-01 17:56:28,414 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:28,414 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:28,429 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-03-01 17:56:28,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:28,614 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:56:28,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:28,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1140008241, now seen corresponding path program 104 times [2022-03-01 17:56:28,614 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:28,615 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160689422] [2022-03-01 17:56:28,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:28,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:28,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:28,783 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:28,783 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:28,783 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160689422] [2022-03-01 17:56:28,783 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160689422] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:28,783 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88557761] [2022-03-01 17:56:28,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:56:28,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:28,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:28,784 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:28,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-03-01 17:56:28,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:56:28,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:28,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-01 17:56:28,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:29,079 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:29,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:29,232 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:29,232 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88557761] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:29,232 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:29,232 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 34 [2022-03-01 17:56:29,232 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658225932] [2022-03-01 17:56:29,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:29,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-01 17:56:29,232 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:29,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-01 17:56:29,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=896, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:56:29,233 INFO L87 Difference]: Start difference. First operand 17983 states and 45560 transitions. Second operand has 35 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:30,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:30,595 INFO L93 Difference]: Finished difference Result 19957 states and 49654 transitions. [2022-03-01 17:56:30,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-01 17:56:30,595 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-01 17:56:30,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:30,631 INFO L225 Difference]: With dead ends: 19957 [2022-03-01 17:56:30,631 INFO L226 Difference]: Without dead ends: 19913 [2022-03-01 17:56:30,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3357 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2658, Invalid=7644, Unknown=0, NotChecked=0, Total=10302 [2022-03-01 17:56:30,633 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 412 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:30,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 167 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:56:30,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19913 states. [2022-03-01 17:56:30,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19913 to 18106. [2022-03-01 17:56:31,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18106 states, 18105 states have (on average 2.5389671361502346) internal successors, (45968), 18105 states have internal predecessors, (45968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:31,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18106 states to 18106 states and 45968 transitions. [2022-03-01 17:56:31,036 INFO L78 Accepts]: Start accepts. Automaton has 18106 states and 45968 transitions. Word has length 36 [2022-03-01 17:56:31,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:31,036 INFO L470 AbstractCegarLoop]: Abstraction has 18106 states and 45968 transitions. [2022-03-01 17:56:31,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:31,036 INFO L276 IsEmpty]: Start isEmpty. Operand 18106 states and 45968 transitions. [2022-03-01 17:56:31,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-01 17:56:31,053 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:31,053 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:31,075 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-03-01 17:56:31,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:31,273 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:56:31,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:31,273 INFO L85 PathProgramCache]: Analyzing trace with hash -830876749, now seen corresponding path program 105 times [2022-03-01 17:56:31,274 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:31,274 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441107538] [2022-03-01 17:56:31,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:31,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:31,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:31,323 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:31,324 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:31,324 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441107538] [2022-03-01 17:56:31,324 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441107538] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:31,324 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005455552] [2022-03-01 17:56:31,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:56:31,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:31,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:31,325 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:31,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-03-01 17:56:31,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-01 17:56:31,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:31,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-01 17:56:31,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:31,808 INFO L353 Elim1Store]: treesize reduction 96, result has 43.2 percent of original size [2022-03-01 17:56:31,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 175 treesize of output 155 [2022-03-01 17:56:38,304 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:38,305 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 291 treesize of output 214 [2022-03-01 17:56:38,315 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:38,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:38,730 INFO L353 Elim1Store]: treesize reduction 48, result has 60.3 percent of original size [2022-03-01 17:56:38,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 136 treesize of output 144 [2022-03-01 17:56:38,796 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:38,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 292 treesize of output 220 [2022-03-01 17:56:39,108 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:39,108 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005455552] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:39,108 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:39,108 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 14] total 30 [2022-03-01 17:56:39,108 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997697278] [2022-03-01 17:56:39,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:39,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:56:39,108 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:39,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:56:39,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:56:39,109 INFO L87 Difference]: Start difference. First operand 18106 states and 45968 transitions. Second operand has 30 states, 30 states have (on average 2.933333333333333) internal successors, (88), 30 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:39,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:39,492 INFO L93 Difference]: Finished difference Result 20472 states and 51856 transitions. [2022-03-01 17:56:39,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:56:39,492 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.933333333333333) internal successors, (88), 30 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:56:39,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:39,529 INFO L225 Difference]: With dead ends: 20472 [2022-03-01 17:56:39,530 INFO L226 Difference]: Without dead ends: 20465 [2022-03-01 17:56:39,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:56:39,530 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 157 mSDsluCounter, 1237 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:39,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 1012 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 763 Invalid, 0 Unknown, 7 Unchecked, 0.3s Time] [2022-03-01 17:56:39,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20465 states. [2022-03-01 17:56:39,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20465 to 19592. [2022-03-01 17:56:39,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19592 states, 19591 states have (on average 2.5449951508345667) internal successors, (49859), 19591 states have internal predecessors, (49859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:39,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19592 states to 19592 states and 49859 transitions. [2022-03-01 17:56:39,909 INFO L78 Accepts]: Start accepts. Automaton has 19592 states and 49859 transitions. Word has length 38 [2022-03-01 17:56:39,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:39,909 INFO L470 AbstractCegarLoop]: Abstraction has 19592 states and 49859 transitions. [2022-03-01 17:56:39,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.933333333333333) internal successors, (88), 30 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:39,910 INFO L276 IsEmpty]: Start isEmpty. Operand 19592 states and 49859 transitions. [2022-03-01 17:56:39,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-01 17:56:39,922 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:39,922 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:56:39,938 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-03-01 17:56:40,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2022-03-01 17:56:40,123 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:56:40,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:40,124 INFO L85 PathProgramCache]: Analyzing trace with hash 515847431, now seen corresponding path program 106 times [2022-03-01 17:56:40,124 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:40,124 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670157576] [2022-03-01 17:56:40,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:40,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:40,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:40,174 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:40,174 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:40,174 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670157576] [2022-03-01 17:56:40,174 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670157576] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:40,174 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599369134] [2022-03-01 17:56:40,174 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:56:40,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:40,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:40,176 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:40,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-03-01 17:56:40,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:56:40,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:40,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-01 17:56:40,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:40,393 INFO L353 Elim1Store]: treesize reduction 48, result has 60.3 percent of original size [2022-03-01 17:56:40,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 118 treesize of output 121 [2022-03-01 17:57:23,172 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:23,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 291 treesize of output 214 [2022-03-01 17:57:23,343 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:23,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:23,600 INFO L353 Elim1Store]: treesize reduction 48, result has 60.3 percent of original size [2022-03-01 17:57:23,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 136 treesize of output 144 [2022-03-01 17:57:23,643 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:23,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 292 treesize of output 220 [2022-03-01 17:57:23,935 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:23,936 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599369134] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:23,936 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:23,936 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 14] total 25 [2022-03-01 17:57:23,936 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478981341] [2022-03-01 17:57:23,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:23,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:57:23,936 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:23,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:57:23,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:57:23,936 INFO L87 Difference]: Start difference. First operand 19592 states and 49859 transitions. Second operand has 25 states, 25 states have (on average 3.0) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:24,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:24,227 INFO L93 Difference]: Finished difference Result 20311 states and 51220 transitions. [2022-03-01 17:57:24,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:57:24,227 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.0) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-03-01 17:57:24,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:24,302 INFO L225 Difference]: With dead ends: 20311 [2022-03-01 17:57:24,302 INFO L226 Difference]: Without dead ends: 20308 [2022-03-01 17:57:24,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:57:24,303 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 197 mSDsluCounter, 1595 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 1322 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 239 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:57:24,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 1322 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 601 Invalid, 0 Unknown, 239 Unchecked, 0.2s Time] [2022-03-01 17:57:24,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20308 states. [2022-03-01 17:57:24,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20308 to 19572. [2022-03-01 17:57:24,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19572 states, 19571 states have (on average 2.545552092381585) internal successors, (49819), 19571 states have internal predecessors, (49819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:24,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19572 states to 19572 states and 49819 transitions. [2022-03-01 17:57:24,624 INFO L78 Accepts]: Start accepts. Automaton has 19572 states and 49819 transitions. Word has length 38 [2022-03-01 17:57:24,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:24,625 INFO L470 AbstractCegarLoop]: Abstraction has 19572 states and 49819 transitions. [2022-03-01 17:57:24,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.0) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:24,625 INFO L276 IsEmpty]: Start isEmpty. Operand 19572 states and 49819 transitions. [2022-03-01 17:57:24,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-01 17:57:24,638 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:24,638 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:24,654 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-03-01 17:57:24,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:24,839 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:57:24,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:24,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1165761971, now seen corresponding path program 107 times [2022-03-01 17:57:24,841 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:24,841 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766471927] [2022-03-01 17:57:24,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:24,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:24,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:24,891 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:57:24,891 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:24,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766471927] [2022-03-01 17:57:24,891 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766471927] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:24,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211673754] [2022-03-01 17:57:24,891 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:57:24,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:24,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:24,892 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:24,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-03-01 17:57:24,921 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-01 17:57:24,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:24,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:57:24,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:25,391 INFO L353 Elim1Store]: treesize reduction 454, result has 28.1 percent of original size [2022-03-01 17:57:25,391 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 15 new quantified variables, introduced 45 case distinctions, treesize of input 148 treesize of output 235 [2022-03-01 17:57:25,516 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:25,516 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 271 treesize of output 211 [2022-03-01 17:57:25,530 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:57:25,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:25,898 INFO L353 Elim1Store]: treesize reduction 48, result has 60.3 percent of original size [2022-03-01 17:57:25,898 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 156 treesize of output 152 [2022-03-01 17:57:25,941 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:25,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 308 treesize of output 220 [2022-03-01 17:57:26,313 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:57:26,313 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211673754] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:26,313 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:26,313 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 14] total 30 [2022-03-01 17:57:26,314 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930182235] [2022-03-01 17:57:26,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:26,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:57:26,314 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:26,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:57:26,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:57:26,314 INFO L87 Difference]: Start difference. First operand 19572 states and 49819 transitions. Second operand has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:26,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:26,735 INFO L93 Difference]: Finished difference Result 20956 states and 53113 transitions. [2022-03-01 17:57:26,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:57:26,735 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-03-01 17:57:26,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:26,771 INFO L225 Difference]: With dead ends: 20956 [2022-03-01 17:57:26,771 INFO L226 Difference]: Without dead ends: 20940 [2022-03-01 17:57:26,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:57:26,772 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 186 mSDsluCounter, 1474 mSDsCounter, 0 mSdLazyCounter, 943 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 1180 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:57:26,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 1180 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 943 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:57:26,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20940 states. [2022-03-01 17:57:27,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20940 to 20358. [2022-03-01 17:57:27,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20358 states, 20357 states have (on average 2.5531758117600827) internal successors, (51975), 20357 states have internal predecessors, (51975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:27,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20358 states to 20358 states and 51975 transitions. [2022-03-01 17:57:27,138 INFO L78 Accepts]: Start accepts. Automaton has 20358 states and 51975 transitions. Word has length 38 [2022-03-01 17:57:27,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:27,138 INFO L470 AbstractCegarLoop]: Abstraction has 20358 states and 51975 transitions. [2022-03-01 17:57:27,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:27,138 INFO L276 IsEmpty]: Start isEmpty. Operand 20358 states and 51975 transitions. [2022-03-01 17:57:27,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-01 17:57:27,152 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:27,152 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:27,168 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-03-01 17:57:27,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-03-01 17:57:27,353 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:57:27,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:27,353 INFO L85 PathProgramCache]: Analyzing trace with hash 494904243, now seen corresponding path program 108 times [2022-03-01 17:57:27,353 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:27,353 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045072731] [2022-03-01 17:57:27,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:27,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:27,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:27,399 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:57:27,399 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:27,399 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045072731] [2022-03-01 17:57:27,399 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045072731] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:27,399 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000687021] [2022-03-01 17:57:27,399 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:57:27,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:27,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:27,400 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:27,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-03-01 17:57:27,439 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-01 17:57:27,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:27,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-01 17:57:27,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:27,931 INFO L353 Elim1Store]: treesize reduction 399, result has 26.2 percent of original size [2022-03-01 17:57:27,932 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 16 new quantified variables, introduced 45 case distinctions, treesize of input 213 treesize of output 210 [2022-03-01 17:57:27,973 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:27,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 231 treesize of output 211 [2022-03-01 17:57:27,988 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:57:27,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:28,539 INFO L353 Elim1Store]: treesize reduction 148, result has 34.2 percent of original size [2022-03-01 17:57:28,540 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 204 treesize of output 198 [2022-03-01 17:57:28,583 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:28,583 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 328 treesize of output 220 [2022-03-01 17:57:28,791 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:57:28,791 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000687021] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:28,791 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:28,791 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 14] total 31 [2022-03-01 17:57:28,791 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848111674] [2022-03-01 17:57:28,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:28,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 17:57:28,792 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:28,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 17:57:28,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:57:28,792 INFO L87 Difference]: Start difference. First operand 20358 states and 51975 transitions. Second operand has 31 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 31 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:29,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:29,169 INFO L93 Difference]: Finished difference Result 21454 states and 54680 transitions. [2022-03-01 17:57:29,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 17:57:29,169 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 31 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:57:29,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:29,206 INFO L225 Difference]: With dead ends: 21454 [2022-03-01 17:57:29,206 INFO L226 Difference]: Without dead ends: 21436 [2022-03-01 17:57:29,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:57:29,206 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 176 mSDsluCounter, 1127 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 930 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:57:29,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 930 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 767 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:57:29,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21436 states. [2022-03-01 17:57:29,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21436 to 20898. [2022-03-01 17:57:29,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20898 states, 20897 states have (on average 2.5599368330382353) internal successors, (53495), 20897 states have internal predecessors, (53495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:29,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20898 states to 20898 states and 53495 transitions. [2022-03-01 17:57:29,533 INFO L78 Accepts]: Start accepts. Automaton has 20898 states and 53495 transitions. Word has length 38 [2022-03-01 17:57:29,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:29,533 INFO L470 AbstractCegarLoop]: Abstraction has 20898 states and 53495 transitions. [2022-03-01 17:57:29,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 31 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:29,534 INFO L276 IsEmpty]: Start isEmpty. Operand 20898 states and 53495 transitions. [2022-03-01 17:57:29,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-01 17:57:29,547 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:29,548 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:29,563 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-03-01 17:57:29,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:29,751 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:57:29,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:29,752 INFO L85 PathProgramCache]: Analyzing trace with hash 45722035, now seen corresponding path program 109 times [2022-03-01 17:57:29,752 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:29,752 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775779006] [2022-03-01 17:57:29,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:29,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:29,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:29,801 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:57:29,801 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:29,801 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775779006] [2022-03-01 17:57:29,801 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775779006] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:29,801 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885944356] [2022-03-01 17:57:29,801 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:57:29,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:29,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:29,802 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:29,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-03-01 17:57:29,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:29,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-01 17:57:29,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:30,129 INFO L353 Elim1Store]: treesize reduction 188, result has 39.2 percent of original size [2022-03-01 17:57:30,129 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 13 new quantified variables, introduced 28 case distinctions, treesize of input 160 treesize of output 169 [2022-03-01 17:57:31,045 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:31,046 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 195 treesize of output 211 [2022-03-01 17:57:31,060 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:57:31,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:31,432 INFO L353 Elim1Store]: treesize reduction 144, result has 36.0 percent of original size [2022-03-01 17:57:31,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 172 treesize of output 196 [2022-03-01 17:57:31,482 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:31,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 328 treesize of output 220 [2022-03-01 17:57:31,679 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:57:31,679 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885944356] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:31,679 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:31,679 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 14] total 28 [2022-03-01 17:57:31,679 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078550129] [2022-03-01 17:57:31,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:31,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 17:57:31,679 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:31,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 17:57:31,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:57:31,680 INFO L87 Difference]: Start difference. First operand 20898 states and 53495 transitions. Second operand has 28 states, 28 states have (on average 2.8214285714285716) internal successors, (79), 28 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:32,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:32,083 INFO L93 Difference]: Finished difference Result 22471 states and 57365 transitions. [2022-03-01 17:57:32,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:57:32,083 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.8214285714285716) internal successors, (79), 28 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-03-01 17:57:32,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:32,121 INFO L225 Difference]: With dead ends: 22471 [2022-03-01 17:57:32,121 INFO L226 Difference]: Without dead ends: 22442 [2022-03-01 17:57:32,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:57:32,122 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 208 mSDsluCounter, 1563 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 1295 SdHoareTripleChecker+Invalid, 964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:57:32,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 1295 Invalid, 964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 863 Invalid, 0 Unknown, 88 Unchecked, 0.3s Time] [2022-03-01 17:57:32,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22442 states. [2022-03-01 17:57:32,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22442 to 21528. [2022-03-01 17:57:32,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21528 states, 21527 states have (on average 2.5663585265016025) internal successors, (55246), 21527 states have internal predecessors, (55246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:32,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21528 states to 21528 states and 55246 transitions. [2022-03-01 17:57:32,573 INFO L78 Accepts]: Start accepts. Automaton has 21528 states and 55246 transitions. Word has length 38 [2022-03-01 17:57:32,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:32,573 INFO L470 AbstractCegarLoop]: Abstraction has 21528 states and 55246 transitions. [2022-03-01 17:57:32,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.8214285714285716) internal successors, (79), 28 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:32,573 INFO L276 IsEmpty]: Start isEmpty. Operand 21528 states and 55246 transitions. [2022-03-01 17:57:32,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-01 17:57:32,589 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:32,589 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:32,605 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2022-03-01 17:57:32,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-03-01 17:57:32,790 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:57:32,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:32,791 INFO L85 PathProgramCache]: Analyzing trace with hash -2121650253, now seen corresponding path program 110 times [2022-03-01 17:57:32,791 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:32,792 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908469533] [2022-03-01 17:57:32,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:32,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:32,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:32,836 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:57:32,837 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:32,837 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908469533] [2022-03-01 17:57:32,837 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908469533] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:32,837 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849600673] [2022-03-01 17:57:32,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:57:32,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:32,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:32,839 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:32,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-03-01 17:57:32,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:57:32,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:32,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-01 17:57:32,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:33,115 INFO L353 Elim1Store]: treesize reduction 103, result has 49.8 percent of original size [2022-03-01 17:57:33,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 154 treesize of output 148 [2022-03-01 17:57:36,256 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:36,256 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 183 treesize of output 211 [2022-03-01 17:57:36,519 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:57:36,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:36,906 INFO L353 Elim1Store]: treesize reduction 204, result has 29.4 percent of original size [2022-03-01 17:57:36,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 168 treesize of output 212 [2022-03-01 17:57:36,950 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:36,951 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 328 treesize of output 220 [2022-03-01 17:57:37,157 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:57:37,157 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849600673] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:37,158 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:37,158 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 14] total 27 [2022-03-01 17:57:37,158 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349747433] [2022-03-01 17:57:37,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:37,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:57:37,158 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:37,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:57:37,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:57:37,158 INFO L87 Difference]: Start difference. First operand 21528 states and 55246 transitions. Second operand has 27 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 27 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:37,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:37,596 INFO L93 Difference]: Finished difference Result 23233 states and 59432 transitions. [2022-03-01 17:57:37,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:57:37,596 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 27 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-03-01 17:57:37,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:37,636 INFO L225 Difference]: With dead ends: 23233 [2022-03-01 17:57:37,636 INFO L226 Difference]: Without dead ends: 23200 [2022-03-01 17:57:37,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:57:37,637 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 205 mSDsluCounter, 1675 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 1412 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 239 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:57:37,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 1412 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 769 Invalid, 0 Unknown, 239 Unchecked, 0.4s Time] [2022-03-01 17:57:37,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23200 states. [2022-03-01 17:57:37,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23200 to 22204. [2022-03-01 17:57:38,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22204 states, 22203 states have (on average 2.572535242985182) internal successors, (57118), 22203 states have internal predecessors, (57118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:38,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22204 states to 22204 states and 57118 transitions. [2022-03-01 17:57:38,061 INFO L78 Accepts]: Start accepts. Automaton has 22204 states and 57118 transitions. Word has length 38 [2022-03-01 17:57:38,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:38,061 INFO L470 AbstractCegarLoop]: Abstraction has 22204 states and 57118 transitions. [2022-03-01 17:57:38,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 27 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:38,062 INFO L276 IsEmpty]: Start isEmpty. Operand 22204 states and 57118 transitions. [2022-03-01 17:57:38,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-01 17:57:38,077 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:38,078 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:38,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-03-01 17:57:38,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-03-01 17:57:38,278 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:57:38,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:38,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1907280461, now seen corresponding path program 111 times [2022-03-01 17:57:38,279 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:38,279 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093551782] [2022-03-01 17:57:38,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:38,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:38,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:38,323 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:57:38,324 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:38,324 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093551782] [2022-03-01 17:57:38,324 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093551782] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:38,324 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945731856] [2022-03-01 17:57:38,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:57:38,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:38,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:38,325 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:38,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-03-01 17:57:38,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-03-01 17:57:38,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:38,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-01 17:57:38,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:38,896 INFO L353 Elim1Store]: treesize reduction 98, result has 45.9 percent of original size [2022-03-01 17:57:38,897 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 201 treesize of output 163 [2022-03-01 17:57:38,938 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:38,939 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 297 treesize of output 211 [2022-03-01 17:57:39,345 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:57:39,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:39,898 INFO L353 Elim1Store]: treesize reduction 272, result has 24.7 percent of original size [2022-03-01 17:57:39,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 156 treesize of output 224 [2022-03-01 17:57:39,942 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:39,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 326 treesize of output 220 [2022-03-01 17:57:40,175 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:57:40,175 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945731856] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:40,175 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:40,175 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 14] total 31 [2022-03-01 17:57:40,175 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55904700] [2022-03-01 17:57:40,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:40,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 17:57:40,175 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:40,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 17:57:40,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:57:40,176 INFO L87 Difference]: Start difference. First operand 22204 states and 57118 transitions. Second operand has 31 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 31 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:40,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:40,651 INFO L93 Difference]: Finished difference Result 23839 states and 61167 transitions. [2022-03-01 17:57:40,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:57:40,651 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 31 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:57:40,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:40,694 INFO L225 Difference]: With dead ends: 23839 [2022-03-01 17:57:40,694 INFO L226 Difference]: Without dead ends: 23809 [2022-03-01 17:57:40,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:57:40,694 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 215 mSDsluCounter, 1476 mSDsCounter, 0 mSdLazyCounter, 996 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 1229 SdHoareTripleChecker+Invalid, 1014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:57:40,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 1229 Invalid, 1014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 996 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:57:40,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23809 states. [2022-03-01 17:57:41,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23809 to 22942. [2022-03-01 17:57:41,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22942 states, 22941 states have (on average 2.580489080685236) internal successors, (59199), 22941 states have internal predecessors, (59199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:41,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22942 states to 22942 states and 59199 transitions. [2022-03-01 17:57:41,182 INFO L78 Accepts]: Start accepts. Automaton has 22942 states and 59199 transitions. Word has length 38 [2022-03-01 17:57:41,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:41,182 INFO L470 AbstractCegarLoop]: Abstraction has 22942 states and 59199 transitions. [2022-03-01 17:57:41,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 31 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:41,182 INFO L276 IsEmpty]: Start isEmpty. Operand 22942 states and 59199 transitions. [2022-03-01 17:57:41,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-01 17:57:41,198 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:41,198 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:57:41,214 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-03-01 17:57:41,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2022-03-01 17:57:41,399 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:57:41,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:41,400 INFO L85 PathProgramCache]: Analyzing trace with hash -2056340557, now seen corresponding path program 112 times [2022-03-01 17:57:41,401 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:41,401 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800686948] [2022-03-01 17:57:41,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:41,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:41,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:41,460 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:57:41,460 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:41,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800686948] [2022-03-01 17:57:41,460 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800686948] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:41,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007119474] [2022-03-01 17:57:41,460 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:57:41,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:41,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:41,461 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:41,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-03-01 17:57:41,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:57:41,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:41,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-01 17:57:41,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:41,702 INFO L353 Elim1Store]: treesize reduction 48, result has 60.3 percent of original size [2022-03-01 17:57:41,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 118 treesize of output 121 [2022-03-01 17:58:23,371 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:23,371 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 291 treesize of output 214 [2022-03-01 17:58:23,743 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:58:23,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:24,002 INFO L353 Elim1Store]: treesize reduction 48, result has 60.3 percent of original size [2022-03-01 17:58:24,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 136 treesize of output 144 [2022-03-01 17:58:24,045 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:24,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 292 treesize of output 220 [2022-03-01 17:58:24,423 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:58:24,423 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007119474] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:24,423 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:24,423 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 14] total 25 [2022-03-01 17:58:24,423 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145475375] [2022-03-01 17:58:24,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:24,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:58:24,424 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:24,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:58:24,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:58:24,424 INFO L87 Difference]: Start difference. First operand 22942 states and 59199 transitions. Second operand has 25 states, 25 states have (on average 2.84) internal successors, (71), 25 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:24,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:24,693 INFO L93 Difference]: Finished difference Result 24194 states and 62052 transitions. [2022-03-01 17:58:24,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:58:24,693 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.84) internal successors, (71), 25 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 38 [2022-03-01 17:58:24,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:24,733 INFO L225 Difference]: With dead ends: 24194 [2022-03-01 17:58:24,734 INFO L226 Difference]: Without dead ends: 24187 [2022-03-01 17:58:24,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:58:24,734 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 221 mSDsluCounter, 1537 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 1264 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 434 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:58:24,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 1264 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 473 Invalid, 0 Unknown, 434 Unchecked, 0.2s Time] [2022-03-01 17:58:24,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24187 states. [2022-03-01 17:58:25,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24187 to 23411. [2022-03-01 17:58:25,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23411 states, 23410 states have (on average 2.5850918410935497) internal successors, (60517), 23410 states have internal predecessors, (60517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:25,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23411 states to 23411 states and 60517 transitions. [2022-03-01 17:58:25,130 INFO L78 Accepts]: Start accepts. Automaton has 23411 states and 60517 transitions. Word has length 38 [2022-03-01 17:58:25,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:25,130 INFO L470 AbstractCegarLoop]: Abstraction has 23411 states and 60517 transitions. [2022-03-01 17:58:25,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.84) internal successors, (71), 25 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:25,130 INFO L276 IsEmpty]: Start isEmpty. Operand 23411 states and 60517 transitions. [2022-03-01 17:58:25,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-01 17:58:25,148 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:25,148 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:58:25,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2022-03-01 17:58:25,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2022-03-01 17:58:25,349 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:58:25,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:25,349 INFO L85 PathProgramCache]: Analyzing trace with hash 654351669, now seen corresponding path program 113 times [2022-03-01 17:58:25,349 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:25,349 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339626495] [2022-03-01 17:58:25,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:25,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:25,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:25,498 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:25,498 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:25,498 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339626495] [2022-03-01 17:58:25,498 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339626495] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:25,498 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229265393] [2022-03-01 17:58:25,498 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:58:25,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:25,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:25,499 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:25,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-03-01 17:58:25,528 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-01 17:58:25,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:25,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 17:58:25,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:25,858 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:25,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:26,054 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:26,054 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229265393] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:26,054 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:26,054 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 40 [2022-03-01 17:58:26,054 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431351699] [2022-03-01 17:58:26,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:26,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-01 17:58:26,055 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:26,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-01 17:58:26,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=1314, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 17:58:26,055 INFO L87 Difference]: Start difference. First operand 23411 states and 60517 transitions. Second operand has 41 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 40 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:28,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:28,954 INFO L93 Difference]: Finished difference Result 26391 states and 66661 transitions. [2022-03-01 17:58:28,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-03-01 17:58:28,955 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 40 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-03-01 17:58:28,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:29,003 INFO L225 Difference]: With dead ends: 26391 [2022-03-01 17:58:29,003 INFO L226 Difference]: Without dead ends: 26391 [2022-03-01 17:58:29,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6946 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5330, Invalid=16426, Unknown=0, NotChecked=0, Total=21756 [2022-03-01 17:58:29,005 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 353 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 1570 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 1666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:58:29,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 341 Invalid, 1666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1570 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-01 17:58:29,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26391 states. [2022-03-01 17:58:29,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26391 to 21896. [2022-03-01 17:58:29,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21896 states, 21895 states have (on average 2.5780771865722767) internal successors, (56447), 21895 states have internal predecessors, (56447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:29,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21896 states to 21896 states and 56447 transitions. [2022-03-01 17:58:29,377 INFO L78 Accepts]: Start accepts. Automaton has 21896 states and 56447 transitions. Word has length 40 [2022-03-01 17:58:29,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:29,377 INFO L470 AbstractCegarLoop]: Abstraction has 21896 states and 56447 transitions. [2022-03-01 17:58:29,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 40 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:29,377 INFO L276 IsEmpty]: Start isEmpty. Operand 21896 states and 56447 transitions. [2022-03-01 17:58:29,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-01 17:58:29,463 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:29,463 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:58:29,478 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2022-03-01 17:58:29,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:29,664 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:58:29,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:29,664 INFO L85 PathProgramCache]: Analyzing trace with hash -531457935, now seen corresponding path program 114 times [2022-03-01 17:58:29,664 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:29,664 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40773049] [2022-03-01 17:58:29,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:29,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:29,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:29,795 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:29,795 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:29,795 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40773049] [2022-03-01 17:58:29,795 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40773049] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:29,795 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834080247] [2022-03-01 17:58:29,795 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:58:29,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:29,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:29,796 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:29,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-03-01 17:58:29,823 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-01 17:58:29,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:29,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 17:58:29,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:30,163 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:30,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:30,361 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:30,362 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834080247] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:30,362 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:30,362 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 39 [2022-03-01 17:58:30,362 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117307613] [2022-03-01 17:58:30,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:30,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-01 17:58:30,362 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:30,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-01 17:58:30,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1190, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 17:58:30,363 INFO L87 Difference]: Start difference. First operand 21896 states and 56447 transitions. Second operand has 40 states, 40 states have (on average 2.2) internal successors, (88), 39 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:33,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:33,487 INFO L93 Difference]: Finished difference Result 30410 states and 76384 transitions. [2022-03-01 17:58:33,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-03-01 17:58:33,487 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.2) internal successors, (88), 39 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:58:33,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:33,547 INFO L225 Difference]: With dead ends: 30410 [2022-03-01 17:58:33,547 INFO L226 Difference]: Without dead ends: 30222 [2022-03-01 17:58:33,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8143 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=5686, Invalid=19120, Unknown=0, NotChecked=0, Total=24806 [2022-03-01 17:58:33,550 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1015 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1015 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 1120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:58:33,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1015 Valid, 277 Invalid, 1120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 880 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:58:33,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30222 states. [2022-03-01 17:58:34,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30222 to 22632. [2022-03-01 17:58:34,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22632 states, 22631 states have (on average 2.5780124607838806) internal successors, (58343), 22631 states have internal predecessors, (58343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:34,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22632 states to 22632 states and 58343 transitions. [2022-03-01 17:58:34,108 INFO L78 Accepts]: Start accepts. Automaton has 22632 states and 58343 transitions. Word has length 40 [2022-03-01 17:58:34,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:34,108 INFO L470 AbstractCegarLoop]: Abstraction has 22632 states and 58343 transitions. [2022-03-01 17:58:34,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.2) internal successors, (88), 39 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:34,109 INFO L276 IsEmpty]: Start isEmpty. Operand 22632 states and 58343 transitions. [2022-03-01 17:58:34,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-01 17:58:34,126 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:34,126 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:58:34,141 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2022-03-01 17:58:34,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:34,327 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:58:34,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:34,327 INFO L85 PathProgramCache]: Analyzing trace with hash -23690603, now seen corresponding path program 115 times [2022-03-01 17:58:34,327 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:34,328 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190121048] [2022-03-01 17:58:34,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:34,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:34,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:34,426 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:34,426 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:34,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190121048] [2022-03-01 17:58:34,426 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190121048] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:34,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594074044] [2022-03-01 17:58:34,426 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:58:34,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:34,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:34,427 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:34,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-03-01 17:58:34,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:34,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 17:58:34,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:34,784 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:34,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:35,147 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:35,147 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594074044] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:35,147 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:35,147 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 17] total 40 [2022-03-01 17:58:35,147 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065178032] [2022-03-01 17:58:35,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:35,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-01 17:58:35,147 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:35,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-01 17:58:35,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=1280, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 17:58:35,148 INFO L87 Difference]: Start difference. First operand 22632 states and 58343 transitions. Second operand has 41 states, 41 states have (on average 2.4146341463414633) internal successors, (99), 40 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:39,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:39,124 INFO L93 Difference]: Finished difference Result 40562 states and 102826 transitions. [2022-03-01 17:58:39,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2022-03-01 17:58:39,124 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.4146341463414633) internal successors, (99), 40 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-03-01 17:58:39,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:39,203 INFO L225 Difference]: With dead ends: 40562 [2022-03-01 17:58:39,203 INFO L226 Difference]: Without dead ends: 40542 [2022-03-01 17:58:39,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19087 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=11545, Invalid=31097, Unknown=0, NotChecked=0, Total=42642 [2022-03-01 17:58:39,208 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 859 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 1138 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 859 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 1379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 1138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:58:39,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [859 Valid, 289 Invalid, 1379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 1138 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 17:58:39,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40542 states. [2022-03-01 17:58:39,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40542 to 29497. [2022-03-01 17:58:39,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29497 states, 29496 states have (on average 2.577230810957418) internal successors, (76018), 29496 states have internal predecessors, (76018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:40,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29497 states to 29497 states and 76018 transitions. [2022-03-01 17:58:40,047 INFO L78 Accepts]: Start accepts. Automaton has 29497 states and 76018 transitions. Word has length 40 [2022-03-01 17:58:40,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:40,048 INFO L470 AbstractCegarLoop]: Abstraction has 29497 states and 76018 transitions. [2022-03-01 17:58:40,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.4146341463414633) internal successors, (99), 40 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:40,048 INFO L276 IsEmpty]: Start isEmpty. Operand 29497 states and 76018 transitions. [2022-03-01 17:58:40,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-01 17:58:40,067 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:40,067 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:58:40,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2022-03-01 17:58:40,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:40,269 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:58:40,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:40,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1407588685, now seen corresponding path program 116 times [2022-03-01 17:58:40,270 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:40,270 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224702730] [2022-03-01 17:58:40,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:40,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:40,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:40,368 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:40,368 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:40,368 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224702730] [2022-03-01 17:58:40,368 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224702730] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:40,368 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446386519] [2022-03-01 17:58:40,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:58:40,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:40,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:40,369 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:40,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-03-01 17:58:40,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:58:40,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:40,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 17:58:40,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:40,725 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:40,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:40,996 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:40,996 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446386519] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:40,996 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:40,996 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 17] total 39 [2022-03-01 17:58:40,996 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834029138] [2022-03-01 17:58:40,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:40,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-01 17:58:40,996 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:40,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-01 17:58:40,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=1156, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 17:58:40,997 INFO L87 Difference]: Start difference. First operand 29497 states and 76018 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) [2022-03-01 17:58:42,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:42,978 INFO L93 Difference]: Finished difference Result 30394 states and 77833 transitions. [2022-03-01 17:58:42,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-01 17:58:42,991 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 [2022-03-01 17:58:42,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:43,118 INFO L225 Difference]: With dead ends: 30394 [2022-03-01 17:58:43,119 INFO L226 Difference]: Without dead ends: 30390 [2022-03-01 17:58:43,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4317 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3799, Invalid=10243, Unknown=0, NotChecked=0, Total=14042 [2022-03-01 17:58:43,124 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 278 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:58:43,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 140 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 819 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:58:43,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30390 states. [2022-03-01 17:58:43,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30390 to 29497. [2022-03-01 17:58:43,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29497 states, 29496 states have (on average 2.5766883645240033) internal successors, (76002), 29496 states have internal predecessors, (76002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:43,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29497 states to 29497 states and 76002 transitions. [2022-03-01 17:58:43,817 INFO L78 Accepts]: Start accepts. Automaton has 29497 states and 76002 transitions. Word has length 40 [2022-03-01 17:58:43,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:43,818 INFO L470 AbstractCegarLoop]: Abstraction has 29497 states and 76002 transitions. [2022-03-01 17:58:43,818 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) [2022-03-01 17:58:43,818 INFO L276 IsEmpty]: Start isEmpty. Operand 29497 states and 76002 transitions. [2022-03-01 17:58:43,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-01 17:58:43,845 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:43,845 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:58:43,861 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2022-03-01 17:58:44,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:44,046 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:58:44,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:44,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1612029327, now seen corresponding path program 117 times [2022-03-01 17:58:44,047 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:44,047 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088578706] [2022-03-01 17:58:44,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:44,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:44,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:44,202 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 53 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:58:44,202 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:44,202 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088578706] [2022-03-01 17:58:44,202 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088578706] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:44,202 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205499851] [2022-03-01 17:58:44,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:58:44,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:44,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:44,204 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:44,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-03-01 17:58:44,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-01 17:58:44,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:44,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 17:58:44,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:44,590 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:44,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:44,940 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:44,940 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205499851] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:44,940 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:44,940 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 17] total 39 [2022-03-01 17:58:44,940 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302843812] [2022-03-01 17:58:44,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:44,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-01 17:58:44,941 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:44,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-01 17:58:44,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=1203, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 17:58:44,942 INFO L87 Difference]: Start difference. First operand 29497 states and 76002 transitions. Second operand has 40 states, 40 states have (on average 2.5) internal successors, (100), 39 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:47,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:47,198 INFO L93 Difference]: Finished difference Result 37584 states and 96225 transitions. [2022-03-01 17:58:47,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-03-01 17:58:47,199 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.5) internal successors, (100), 39 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:58:47,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:47,272 INFO L225 Difference]: With dead ends: 37584 [2022-03-01 17:58:47,272 INFO L226 Difference]: Without dead ends: 37560 [2022-03-01 17:58:47,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5072 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4219, Invalid=11531, Unknown=0, NotChecked=0, Total=15750 [2022-03-01 17:58:47,273 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 528 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 1216 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 528 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 1412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 1216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:58:47,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [528 Valid, 217 Invalid, 1412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 1216 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 17:58:47,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37560 states. [2022-03-01 17:58:47,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37560 to 29719. [2022-03-01 17:58:47,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29719 states, 29718 states have (on average 2.5852345379904436) internal successors, (76828), 29718 states have internal predecessors, (76828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:47,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29719 states to 29719 states and 76828 transitions. [2022-03-01 17:58:47,980 INFO L78 Accepts]: Start accepts. Automaton has 29719 states and 76828 transitions. Word has length 40 [2022-03-01 17:58:47,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:47,981 INFO L470 AbstractCegarLoop]: Abstraction has 29719 states and 76828 transitions. [2022-03-01 17:58:47,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.5) internal successors, (100), 39 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:47,981 INFO L276 IsEmpty]: Start isEmpty. Operand 29719 states and 76828 transitions. [2022-03-01 17:58:48,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-01 17:58:48,001 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:48,001 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:58:48,017 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2022-03-01 17:58:48,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:48,202 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:58:48,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:48,203 INFO L85 PathProgramCache]: Analyzing trace with hash -472234239, now seen corresponding path program 118 times [2022-03-01 17:58:48,203 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:48,203 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386971085] [2022-03-01 17:58:48,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:48,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:48,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:48,305 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:48,305 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:48,305 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386971085] [2022-03-01 17:58:48,305 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386971085] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:48,306 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023331284] [2022-03-01 17:58:48,306 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:58:48,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:48,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:48,307 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:48,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-03-01 17:58:48,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:58:48,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:48,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 17:58:48,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:48,663 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:48,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:48,916 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:48,916 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023331284] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:48,916 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:48,916 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 17] total 39 [2022-03-01 17:58:48,916 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873926853] [2022-03-01 17:58:48,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:48,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-01 17:58:48,917 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:48,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-01 17:58:48,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=1167, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 17:58:48,917 INFO L87 Difference]: Start difference. First operand 29719 states and 76828 transitions. Second operand has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:51,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:51,105 INFO L93 Difference]: Finished difference Result 32131 states and 82168 transitions. [2022-03-01 17:58:51,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-01 17:58:51,106 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-03-01 17:58:51,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:51,172 INFO L225 Difference]: With dead ends: 32131 [2022-03-01 17:58:51,172 INFO L226 Difference]: Without dead ends: 32111 [2022-03-01 17:58:51,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4501 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3804, Invalid=10476, Unknown=0, NotChecked=0, Total=14280 [2022-03-01 17:58:51,174 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 388 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 1069 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 1175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:58:51,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 277 Invalid, 1175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1069 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:58:51,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32111 states. [2022-03-01 17:58:51,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32111 to 30307. [2022-03-01 17:58:51,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30307 states, 30306 states have (on average 2.587045469543985) internal successors, (78403), 30306 states have internal predecessors, (78403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:51,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30307 states to 30307 states and 78403 transitions. [2022-03-01 17:58:51,786 INFO L78 Accepts]: Start accepts. Automaton has 30307 states and 78403 transitions. Word has length 40 [2022-03-01 17:58:51,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:51,786 INFO L470 AbstractCegarLoop]: Abstraction has 30307 states and 78403 transitions. [2022-03-01 17:58:51,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:51,786 INFO L276 IsEmpty]: Start isEmpty. Operand 30307 states and 78403 transitions. [2022-03-01 17:58:51,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-01 17:58:51,805 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:51,805 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:58:51,820 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2022-03-01 17:58:52,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-03-01 17:58:52,006 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:58:52,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:52,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1148637827, now seen corresponding path program 119 times [2022-03-01 17:58:52,006 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:52,006 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760134641] [2022-03-01 17:58:52,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:52,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:52,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:52,132 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 31 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:52,132 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:52,132 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760134641] [2022-03-01 17:58:52,132 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760134641] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:52,132 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544369323] [2022-03-01 17:58:52,132 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:58:52,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:52,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:52,133 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:52,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-03-01 17:58:52,161 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-03-01 17:58:52,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:52,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 17:58:52,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:52,486 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 31 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:52,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:52,728 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:52,728 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544369323] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:52,728 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:52,728 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 17] total 39 [2022-03-01 17:58:52,728 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315999518] [2022-03-01 17:58:52,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:52,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-01 17:58:52,728 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:52,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-01 17:58:52,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 17:58:52,729 INFO L87 Difference]: Start difference. First operand 30307 states and 78403 transitions. Second operand has 40 states, 40 states have (on average 2.375) internal successors, (95), 39 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:54,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:54,852 INFO L93 Difference]: Finished difference Result 33401 states and 85130 transitions. [2022-03-01 17:58:54,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-03-01 17:58:54,853 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.375) internal successors, (95), 39 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-03-01 17:58:54,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:54,925 INFO L225 Difference]: With dead ends: 33401 [2022-03-01 17:58:54,925 INFO L226 Difference]: Without dead ends: 33361 [2022-03-01 17:58:54,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4742 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3817, Invalid=10703, Unknown=0, NotChecked=0, Total=14520 [2022-03-01 17:58:54,927 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 407 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 876 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:58:54,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 241 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 876 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:58:54,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33361 states. [2022-03-01 17:58:55,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33361 to 30181. [2022-03-01 17:58:55,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30181 states, 30180 states have (on average 2.591186216037111) internal successors, (78202), 30180 states have internal predecessors, (78202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:55,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30181 states to 30181 states and 78202 transitions. [2022-03-01 17:58:55,533 INFO L78 Accepts]: Start accepts. Automaton has 30181 states and 78202 transitions. Word has length 40 [2022-03-01 17:58:55,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:55,533 INFO L470 AbstractCegarLoop]: Abstraction has 30181 states and 78202 transitions. [2022-03-01 17:58:55,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.375) internal successors, (95), 39 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:55,533 INFO L276 IsEmpty]: Start isEmpty. Operand 30181 states and 78202 transitions. [2022-03-01 17:58:55,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-01 17:58:55,552 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:55,552 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:58:55,568 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2022-03-01 17:58:55,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-03-01 17:58:55,753 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:58:55,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:55,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1662543097, now seen corresponding path program 120 times [2022-03-01 17:58:55,753 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:55,753 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273631537] [2022-03-01 17:58:55,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:55,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:55,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:55,864 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:55,865 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:55,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273631537] [2022-03-01 17:58:55,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273631537] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:55,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684241522] [2022-03-01 17:58:55,865 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:58:55,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:55,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:55,866 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:55,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-03-01 17:58:55,897 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-03-01 17:58:55,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:55,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 17:58:55,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:56,348 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:56,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:56,567 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:56,567 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684241522] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:56,567 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:56,568 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 39 [2022-03-01 17:58:56,568 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088980926] [2022-03-01 17:58:56,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:56,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-01 17:58:56,568 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:56,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-01 17:58:56,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=1180, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 17:58:56,568 INFO L87 Difference]: Start difference. First operand 30181 states and 78202 transitions. Second operand has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:58,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:58,497 INFO L93 Difference]: Finished difference Result 33916 states and 86143 transitions. [2022-03-01 17:58:58,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-01 17:58:58,498 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-03-01 17:58:58,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:58,561 INFO L225 Difference]: With dead ends: 33916 [2022-03-01 17:58:58,561 INFO L226 Difference]: Without dead ends: 33862 [2022-03-01 17:58:58,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4950 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3838, Invalid=10924, Unknown=0, NotChecked=0, Total=14762 [2022-03-01 17:58:58,563 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 494 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 1050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:58:58,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [494 Valid, 259 Invalid, 1050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 903 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:58:58,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33862 states. [2022-03-01 17:58:59,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33862 to 28876. [2022-03-01 17:58:59,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28876 states, 28875 states have (on average 2.596987012987013) internal successors, (74988), 28875 states have internal predecessors, (74988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:59,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28876 states to 28876 states and 74988 transitions. [2022-03-01 17:58:59,231 INFO L78 Accepts]: Start accepts. Automaton has 28876 states and 74988 transitions. Word has length 40 [2022-03-01 17:58:59,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:59,232 INFO L470 AbstractCegarLoop]: Abstraction has 28876 states and 74988 transitions. [2022-03-01 17:58:59,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:59,232 INFO L276 IsEmpty]: Start isEmpty. Operand 28876 states and 74988 transitions. [2022-03-01 17:58:59,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-01 17:58:59,250 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:59,250 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:58:59,266 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2022-03-01 17:58:59,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-03-01 17:58:59,451 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:58:59,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:59,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1672981877, now seen corresponding path program 121 times [2022-03-01 17:58:59,451 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:59,451 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167289700] [2022-03-01 17:58:59,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:59,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:59,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:59,590 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 29 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:59,591 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:59,591 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167289700] [2022-03-01 17:58:59,591 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167289700] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:59,591 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585595261] [2022-03-01 17:58:59,591 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:58:59,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:59,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:59,592 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:59,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-03-01 17:58:59,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:59,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 17:58:59,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:00,086 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 29 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:00,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:00,290 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:00,290 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585595261] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:00,290 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:00,290 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 39 [2022-03-01 17:59:00,290 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12055989] [2022-03-01 17:59:00,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:00,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-01 17:59:00,290 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:00,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-01 17:59:00,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=1182, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 17:59:00,291 INFO L87 Difference]: Start difference. First operand 28876 states and 74988 transitions. Second operand has 40 states, 40 states have (on average 2.275) internal successors, (91), 39 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) [2022-03-01 17:59:02,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:02,181 INFO L93 Difference]: Finished difference Result 33473 states and 84685 transitions. [2022-03-01 17:59:02,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-01 17:59:02,181 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.275) internal successors, (91), 39 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 [2022-03-01 17:59:02,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:02,244 INFO L225 Difference]: With dead ends: 33473 [2022-03-01 17:59:02,244 INFO L226 Difference]: Without dead ends: 33417 [2022-03-01 17:59:02,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5136 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3867, Invalid=11139, Unknown=0, NotChecked=0, Total=15006 [2022-03-01 17:59:02,245 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 456 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:02,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [456 Valid, 204 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:59:02,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33417 states. [2022-03-01 17:59:02,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33417 to 26468. [2022-03-01 17:59:02,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26468 states, 26467 states have (on average 2.601541542297956) internal successors, (68855), 26467 states have internal predecessors, (68855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:02,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26468 states to 26468 states and 68855 transitions. [2022-03-01 17:59:02,797 INFO L78 Accepts]: Start accepts. Automaton has 26468 states and 68855 transitions. Word has length 40 [2022-03-01 17:59:02,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:02,797 INFO L470 AbstractCegarLoop]: Abstraction has 26468 states and 68855 transitions. [2022-03-01 17:59:02,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.275) internal successors, (91), 39 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) [2022-03-01 17:59:02,797 INFO L276 IsEmpty]: Start isEmpty. Operand 26468 states and 68855 transitions. [2022-03-01 17:59:02,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-01 17:59:02,814 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:02,814 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:02,830 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2022-03-01 17:59:03,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-03-01 17:59:03,015 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:59:03,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:03,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1180252431, now seen corresponding path program 122 times [2022-03-01 17:59:03,015 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:03,015 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378041060] [2022-03-01 17:59:03,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:03,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:03,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:03,160 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 34 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:03,161 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:03,161 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378041060] [2022-03-01 17:59:03,161 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378041060] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:03,161 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791211477] [2022-03-01 17:59:03,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:59:03,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:03,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:03,162 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:03,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-03-01 17:59:03,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:59:03,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:03,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 17:59:03,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:03,518 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 34 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:03,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:03,710 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:03,710 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791211477] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:03,711 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:03,711 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 39 [2022-03-01 17:59:03,711 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983362102] [2022-03-01 17:59:03,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:03,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-01 17:59:03,711 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:03,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-01 17:59:03,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=1181, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 17:59:03,712 INFO L87 Difference]: Start difference. First operand 26468 states and 68855 transitions. Second operand has 40 states, 40 states have (on average 2.225) internal successors, (89), 39 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:05,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:05,765 INFO L93 Difference]: Finished difference Result 32096 states and 80790 transitions. [2022-03-01 17:59:05,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-01 17:59:05,765 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.225) internal successors, (89), 39 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-03-01 17:59:05,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:05,833 INFO L225 Difference]: With dead ends: 32096 [2022-03-01 17:59:05,833 INFO L226 Difference]: Without dead ends: 32046 [2022-03-01 17:59:05,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5236 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3904, Invalid=11348, Unknown=0, NotChecked=0, Total=15252 [2022-03-01 17:59:05,834 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 591 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 591 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:05,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [591 Valid, 228 Invalid, 1013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:59:05,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32046 states. [2022-03-01 17:59:06,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32046 to 24004. [2022-03-01 17:59:06,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24004 states, 24003 states have (on average 2.599633379160938) internal successors, (62399), 24003 states have internal predecessors, (62399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:06,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24004 states to 24004 states and 62399 transitions. [2022-03-01 17:59:06,383 INFO L78 Accepts]: Start accepts. Automaton has 24004 states and 62399 transitions. Word has length 40 [2022-03-01 17:59:06,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:06,383 INFO L470 AbstractCegarLoop]: Abstraction has 24004 states and 62399 transitions. [2022-03-01 17:59:06,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.225) internal successors, (89), 39 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:06,383 INFO L276 IsEmpty]: Start isEmpty. Operand 24004 states and 62399 transitions. [2022-03-01 17:59:06,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-01 17:59:06,398 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:06,399 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:06,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2022-03-01 17:59:06,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:06,603 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:59:06,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:06,604 INFO L85 PathProgramCache]: Analyzing trace with hash 620886581, now seen corresponding path program 123 times [2022-03-01 17:59:06,604 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:06,604 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783523967] [2022-03-01 17:59:06,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:06,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:06,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:06,910 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 35 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:59:06,911 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:06,911 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783523967] [2022-03-01 17:59:06,912 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783523967] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:06,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917483585] [2022-03-01 17:59:06,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:59:06,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:06,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:06,914 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:06,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-03-01 17:59:06,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-01 17:59:06,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:06,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 17:59:06,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:07,342 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:07,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:07,602 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 42 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:07,602 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917483585] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:07,603 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:07,603 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 40 [2022-03-01 17:59:07,603 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50334325] [2022-03-01 17:59:07,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:07,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-01 17:59:07,603 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:07,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-01 17:59:07,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1323, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 17:59:07,604 INFO L87 Difference]: Start difference. First operand 24004 states and 62399 transitions. Second operand has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 40 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:10,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:10,447 INFO L93 Difference]: Finished difference Result 28861 states and 72270 transitions. [2022-03-01 17:59:10,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-03-01 17:59:10,447 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 40 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-03-01 17:59:10,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:10,506 INFO L225 Difference]: With dead ends: 28861 [2022-03-01 17:59:10,506 INFO L226 Difference]: Without dead ends: 28861 [2022-03-01 17:59:10,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7191 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=5273, Invalid=16483, Unknown=0, NotChecked=0, Total=21756 [2022-03-01 17:59:10,508 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 446 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 1336 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 1475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 1336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:10,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [446 Valid, 364 Invalid, 1475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 1336 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 17:59:10,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28861 states. [2022-03-01 17:59:10,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28861 to 21876. [2022-03-01 17:59:10,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21876 states, 21875 states have (on average 2.5954285714285716) internal successors, (56775), 21875 states have internal predecessors, (56775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:10,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21876 states to 21876 states and 56775 transitions. [2022-03-01 17:59:10,918 INFO L78 Accepts]: Start accepts. Automaton has 21876 states and 56775 transitions. Word has length 40 [2022-03-01 17:59:10,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:10,919 INFO L470 AbstractCegarLoop]: Abstraction has 21876 states and 56775 transitions. [2022-03-01 17:59:10,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 40 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:10,919 INFO L276 IsEmpty]: Start isEmpty. Operand 21876 states and 56775 transitions. [2022-03-01 17:59:10,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-01 17:59:10,933 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:10,933 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:10,948 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2022-03-01 17:59:11,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:11,134 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:59:11,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:11,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1406243953, now seen corresponding path program 124 times [2022-03-01 17:59:11,135 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:11,135 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890632211] [2022-03-01 17:59:11,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:11,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:11,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:11,288 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:59:11,288 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:11,288 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890632211] [2022-03-01 17:59:11,288 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890632211] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:11,288 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673634725] [2022-03-01 17:59:11,288 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:59:11,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:11,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:11,290 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:11,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-03-01 17:59:11,323 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:59:11,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:11,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 17:59:11,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:11,718 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:11,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:11,924 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:11,925 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673634725] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:11,925 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:11,925 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 39 [2022-03-01 17:59:11,925 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139188953] [2022-03-01 17:59:11,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:11,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-01 17:59:11,925 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:11,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-01 17:59:11,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=1193, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 17:59:11,926 INFO L87 Difference]: Start difference. First operand 21876 states and 56775 transitions. Second operand has 40 states, 40 states have (on average 2.225) internal successors, (89), 39 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:14,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:14,237 INFO L93 Difference]: Finished difference Result 25120 states and 63294 transitions. [2022-03-01 17:59:14,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-03-01 17:59:14,238 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.225) internal successors, (89), 39 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-03-01 17:59:14,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:14,283 INFO L225 Difference]: With dead ends: 25120 [2022-03-01 17:59:14,283 INFO L226 Difference]: Without dead ends: 24982 [2022-03-01 17:59:14,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6135 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=4209, Invalid=13881, Unknown=0, NotChecked=0, Total=18090 [2022-03-01 17:59:14,285 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 481 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 930 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:14,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [481 Valid, 308 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 930 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:59:14,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24982 states. [2022-03-01 17:59:14,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24982 to 21296. [2022-03-01 17:59:14,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21296 states, 21295 states have (on average 2.5844094857947875) internal successors, (55035), 21295 states have internal predecessors, (55035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:14,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21296 states to 21296 states and 55035 transitions. [2022-03-01 17:59:14,741 INFO L78 Accepts]: Start accepts. Automaton has 21296 states and 55035 transitions. Word has length 40 [2022-03-01 17:59:14,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:14,741 INFO L470 AbstractCegarLoop]: Abstraction has 21296 states and 55035 transitions. [2022-03-01 17:59:14,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.225) internal successors, (89), 39 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:14,741 INFO L276 IsEmpty]: Start isEmpty. Operand 21296 states and 55035 transitions. [2022-03-01 17:59:14,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-01 17:59:14,754 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:14,754 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:14,770 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2022-03-01 17:59:14,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2022-03-01 17:59:14,955 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:59:14,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:14,956 INFO L85 PathProgramCache]: Analyzing trace with hash 2109118261, now seen corresponding path program 125 times [2022-03-01 17:59:14,956 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:14,956 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185399533] [2022-03-01 17:59:14,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:14,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:14,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:15,082 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 34 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:59:15,083 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:15,083 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185399533] [2022-03-01 17:59:15,083 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185399533] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:15,083 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186629523] [2022-03-01 17:59:15,083 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:59:15,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:15,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:15,084 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:15,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-03-01 17:59:15,114 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-01 17:59:15,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:15,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 17:59:15,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:15,525 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:15,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:15,752 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 42 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:15,753 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186629523] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:15,753 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:15,753 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 40 [2022-03-01 17:59:15,753 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068378405] [2022-03-01 17:59:15,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:15,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-01 17:59:15,753 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:15,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-01 17:59:15,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=1322, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 17:59:15,753 INFO L87 Difference]: Start difference. First operand 21296 states and 55035 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:18,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:18,740 INFO L93 Difference]: Finished difference Result 27538 states and 68321 transitions. [2022-03-01 17:59:18,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-03-01 17:59:18,741 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-03-01 17:59:18,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:18,786 INFO L225 Difference]: With dead ends: 27538 [2022-03-01 17:59:18,786 INFO L226 Difference]: Without dead ends: 27538 [2022-03-01 17:59:18,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8770 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=6130, Invalid=18050, Unknown=0, NotChecked=0, Total=24180 [2022-03-01 17:59:18,787 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 484 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 1413 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 1585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 1413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:18,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [484 Valid, 390 Invalid, 1585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 1413 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 17:59:18,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27538 states. [2022-03-01 17:59:19,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27538 to 19476. [2022-03-01 17:59:19,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19476 states, 19475 states have (on average 2.5761232349165595) internal successors, (50170), 19475 states have internal predecessors, (50170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:19,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19476 states to 19476 states and 50170 transitions. [2022-03-01 17:59:19,118 INFO L78 Accepts]: Start accepts. Automaton has 19476 states and 50170 transitions. Word has length 40 [2022-03-01 17:59:19,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:19,118 INFO L470 AbstractCegarLoop]: Abstraction has 19476 states and 50170 transitions. [2022-03-01 17:59:19,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:19,118 INFO L276 IsEmpty]: Start isEmpty. Operand 19476 states and 50170 transitions. [2022-03-01 17:59:19,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-01 17:59:19,130 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:19,130 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:19,146 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2022-03-01 17:59:19,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2022-03-01 17:59:19,331 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:59:19,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:19,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1390383217, now seen corresponding path program 126 times [2022-03-01 17:59:19,332 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:19,332 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556656484] [2022-03-01 17:59:19,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:19,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:19,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:19,446 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:59:19,447 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:19,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556656484] [2022-03-01 17:59:19,447 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556656484] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:19,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135166225] [2022-03-01 17:59:19,447 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:59:19,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:19,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:19,448 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:19,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-03-01 17:59:19,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-01 17:59:19,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:19,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 17:59:19,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:19,806 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 31 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:19,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:20,020 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:20,021 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135166225] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:20,021 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:20,021 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 39 [2022-03-01 17:59:20,021 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211192977] [2022-03-01 17:59:20,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:20,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-01 17:59:20,021 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:20,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-01 17:59:20,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=1193, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 17:59:20,022 INFO L87 Difference]: Start difference. First operand 19476 states and 50170 transitions. Second operand has 40 states, 40 states have (on average 2.275) internal successors, (91), 39 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) [2022-03-01 17:59:22,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:22,033 INFO L93 Difference]: Finished difference Result 22442 states and 56490 transitions. [2022-03-01 17:59:22,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-03-01 17:59:22,034 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.275) internal successors, (91), 39 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 [2022-03-01 17:59:22,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:22,073 INFO L225 Difference]: With dead ends: 22442 [2022-03-01 17:59:22,073 INFO L226 Difference]: Without dead ends: 22343 [2022-03-01 17:59:22,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5436 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3703, Invalid=12047, Unknown=0, NotChecked=0, Total=15750 [2022-03-01 17:59:22,075 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 573 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 573 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:22,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [573 Valid, 247 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:59:22,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22343 states. [2022-03-01 17:59:22,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22343 to 19294. [2022-03-01 17:59:22,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19294 states, 19293 states have (on average 2.5669932099725288) internal successors, (49525), 19293 states have internal predecessors, (49525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:22,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19294 states to 19294 states and 49525 transitions. [2022-03-01 17:59:22,553 INFO L78 Accepts]: Start accepts. Automaton has 19294 states and 49525 transitions. Word has length 40 [2022-03-01 17:59:22,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:22,553 INFO L470 AbstractCegarLoop]: Abstraction has 19294 states and 49525 transitions. [2022-03-01 17:59:22,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.275) internal successors, (91), 39 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) [2022-03-01 17:59:22,553 INFO L276 IsEmpty]: Start isEmpty. Operand 19294 states and 49525 transitions. [2022-03-01 17:59:22,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-01 17:59:22,565 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:22,565 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:22,581 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2022-03-01 17:59:22,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:22,767 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:59:22,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:22,767 INFO L85 PathProgramCache]: Analyzing trace with hash -991005643, now seen corresponding path program 127 times [2022-03-01 17:59:22,767 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:22,767 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910181964] [2022-03-01 17:59:22,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:22,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:22,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:22,885 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 33 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:59:22,886 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:22,886 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910181964] [2022-03-01 17:59:22,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910181964] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:22,886 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588844555] [2022-03-01 17:59:22,886 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:59:22,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:22,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:22,887 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:22,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-03-01 17:59:22,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:22,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 17:59:22,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:23,247 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:23,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:23,498 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 42 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:23,498 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588844555] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:23,498 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:23,498 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 40 [2022-03-01 17:59:23,498 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063989111] [2022-03-01 17:59:23,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:23,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-01 17:59:23,499 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:23,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-01 17:59:23,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=1316, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 17:59:23,499 INFO L87 Difference]: Start difference. First operand 19294 states and 49525 transitions. Second operand has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 40 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:26,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:26,871 INFO L93 Difference]: Finished difference Result 26530 states and 65364 transitions. [2022-03-01 17:59:26,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-03-01 17:59:26,871 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 40 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-03-01 17:59:26,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:26,915 INFO L225 Difference]: With dead ends: 26530 [2022-03-01 17:59:26,915 INFO L226 Difference]: Without dead ends: 26530 [2022-03-01 17:59:26,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11387 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=7659, Invalid=20733, Unknown=0, NotChecked=0, Total=28392 [2022-03-01 17:59:26,916 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 634 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 1444 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 1638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 1444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:26,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [634 Valid, 352 Invalid, 1638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 1444 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-01 17:59:26,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26530 states. [2022-03-01 17:59:27,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26530 to 17898. [2022-03-01 17:59:27,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17898 states, 17897 states have (on average 2.5554003464267754) internal successors, (45734), 17897 states have internal predecessors, (45734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:27,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17898 states to 17898 states and 45734 transitions. [2022-03-01 17:59:27,232 INFO L78 Accepts]: Start accepts. Automaton has 17898 states and 45734 transitions. Word has length 40 [2022-03-01 17:59:27,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:27,232 INFO L470 AbstractCegarLoop]: Abstraction has 17898 states and 45734 transitions. [2022-03-01 17:59:27,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 40 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:27,232 INFO L276 IsEmpty]: Start isEmpty. Operand 17898 states and 45734 transitions. [2022-03-01 17:59:27,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-01 17:59:27,243 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:27,243 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:27,259 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2022-03-01 17:59:27,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:27,444 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:59:27,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:27,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1966902385, now seen corresponding path program 128 times [2022-03-01 17:59:27,444 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:27,444 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902083146] [2022-03-01 17:59:27,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:27,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:27,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:27,549 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:59:27,549 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:27,549 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902083146] [2022-03-01 17:59:27,549 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902083146] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:27,549 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854172179] [2022-03-01 17:59:27,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:59:27,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:27,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:27,551 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:27,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-03-01 17:59:27,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:59:27,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:27,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 17:59:27,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:27,907 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:27,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:28,137 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:28,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854172179] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:28,137 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:28,137 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 39 [2022-03-01 17:59:28,138 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325521010] [2022-03-01 17:59:28,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:28,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-01 17:59:28,138 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:28,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-01 17:59:28,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1190, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 17:59:28,138 INFO L87 Difference]: Start difference. First operand 17898 states and 45734 transitions. Second operand has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:30,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:30,013 INFO L93 Difference]: Finished difference Result 20487 states and 51579 transitions. [2022-03-01 17:59:30,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-03-01 17:59:30,013 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-03-01 17:59:30,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:30,046 INFO L225 Difference]: With dead ends: 20487 [2022-03-01 17:59:30,046 INFO L226 Difference]: Without dead ends: 20421 [2022-03-01 17:59:30,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4882 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3382, Invalid=10660, Unknown=0, NotChecked=0, Total=14042 [2022-03-01 17:59:30,047 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 430 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 957 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 1080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:30,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 274 Invalid, 1080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 957 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:59:30,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20421 states. [2022-03-01 17:59:30,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20421 to 18251. [2022-03-01 17:59:30,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18251 states, 18250 states have (on average 2.5564383561643838) internal successors, (46655), 18250 states have internal predecessors, (46655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:30,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18251 states to 18251 states and 46655 transitions. [2022-03-01 17:59:30,379 INFO L78 Accepts]: Start accepts. Automaton has 18251 states and 46655 transitions. Word has length 40 [2022-03-01 17:59:30,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:30,379 INFO L470 AbstractCegarLoop]: Abstraction has 18251 states and 46655 transitions. [2022-03-01 17:59:30,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:30,379 INFO L276 IsEmpty]: Start isEmpty. Operand 18251 states and 46655 transitions. [2022-03-01 17:59:30,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-01 17:59:30,391 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:30,391 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:30,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2022-03-01 17:59:30,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:30,592 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:59:30,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:30,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1115263285, now seen corresponding path program 129 times [2022-03-01 17:59:30,592 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:30,592 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487393355] [2022-03-01 17:59:30,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:30,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:30,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:30,728 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:59:30,729 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:30,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487393355] [2022-03-01 17:59:30,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487393355] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:30,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331996409] [2022-03-01 17:59:30,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:59:30,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:30,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:30,730 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:30,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-03-01 17:59:30,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-01 17:59:30,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:30,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 17:59:30,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:31,145 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:31,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:31,420 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 42 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:31,420 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331996409] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:31,421 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:31,421 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 40 [2022-03-01 17:59:31,421 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326878367] [2022-03-01 17:59:31,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:31,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-01 17:59:31,421 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:31,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-01 17:59:31,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=1305, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 17:59:31,421 INFO L87 Difference]: Start difference. First operand 18251 states and 46655 transitions. Second operand has 41 states, 41 states have (on average 2.4146341463414633) internal successors, (99), 40 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:35,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:35,112 INFO L93 Difference]: Finished difference Result 26524 states and 65049 transitions. [2022-03-01 17:59:35,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2022-03-01 17:59:35,113 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.4146341463414633) internal successors, (99), 40 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-03-01 17:59:35,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:35,159 INFO L225 Difference]: With dead ends: 26524 [2022-03-01 17:59:35,160 INFO L226 Difference]: Without dead ends: 26524 [2022-03-01 17:59:35,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15320 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=9859, Invalid=24923, Unknown=0, NotChecked=0, Total=34782 [2022-03-01 17:59:35,163 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 685 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 1475 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 1689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 1475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:35,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [685 Valid, 403 Invalid, 1689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 1475 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-01 17:59:35,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26524 states. [2022-03-01 17:59:35,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26524 to 17253. [2022-03-01 17:59:35,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17253 states, 17252 states have (on average 2.541386505912358) internal successors, (43844), 17252 states have internal predecessors, (43844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:35,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17253 states to 17253 states and 43844 transitions. [2022-03-01 17:59:35,536 INFO L78 Accepts]: Start accepts. Automaton has 17253 states and 43844 transitions. Word has length 40 [2022-03-01 17:59:35,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:35,536 INFO L470 AbstractCegarLoop]: Abstraction has 17253 states and 43844 transitions. [2022-03-01 17:59:35,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.4146341463414633) internal successors, (99), 40 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:35,536 INFO L276 IsEmpty]: Start isEmpty. Operand 17253 states and 43844 transitions. [2022-03-01 17:59:35,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-01 17:59:35,547 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:35,548 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:35,563 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2022-03-01 17:59:35,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2022-03-01 17:59:35,748 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:59:35,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:35,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1118341233, now seen corresponding path program 130 times [2022-03-01 17:59:35,748 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:35,748 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874638285] [2022-03-01 17:59:35,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:35,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:35,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:35,849 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:59:35,850 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:35,850 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874638285] [2022-03-01 17:59:35,850 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874638285] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:35,850 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837833900] [2022-03-01 17:59:35,850 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:59:35,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:35,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:35,851 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:35,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-03-01 17:59:35,875 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:59:35,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:35,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 17:59:35,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:36,207 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 29 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:36,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:36,450 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:36,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837833900] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:36,451 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:36,451 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 17] total 39 [2022-03-01 17:59:36,451 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726701017] [2022-03-01 17:59:36,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:36,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-01 17:59:36,451 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:36,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-01 17:59:36,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=1184, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 17:59:36,452 INFO L87 Difference]: Start difference. First operand 17253 states and 43844 transitions. Second operand has 40 states, 40 states have (on average 2.375) internal successors, (95), 39 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:38,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:38,213 INFO L93 Difference]: Finished difference Result 19251 states and 48390 transitions. [2022-03-01 17:59:38,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-01 17:59:38,213 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.375) internal successors, (95), 39 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-03-01 17:59:38,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:38,244 INFO L225 Difference]: With dead ends: 19251 [2022-03-01 17:59:38,244 INFO L226 Difference]: Without dead ends: 19212 [2022-03-01 17:59:38,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4450 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3202, Invalid=9680, Unknown=0, NotChecked=0, Total=12882 [2022-03-01 17:59:38,245 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 304 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 1102 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 1182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:38,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 345 Invalid, 1182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1102 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:59:38,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19212 states. [2022-03-01 17:59:38,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19212 to 17619. [2022-03-01 17:59:38,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17619 states, 17618 states have (on average 2.546032466795323) internal successors, (44856), 17618 states have internal predecessors, (44856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:38,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17619 states to 17619 states and 44856 transitions. [2022-03-01 17:59:38,557 INFO L78 Accepts]: Start accepts. Automaton has 17619 states and 44856 transitions. Word has length 40 [2022-03-01 17:59:38,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:38,557 INFO L470 AbstractCegarLoop]: Abstraction has 17619 states and 44856 transitions. [2022-03-01 17:59:38,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.375) internal successors, (95), 39 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:38,557 INFO L276 IsEmpty]: Start isEmpty. Operand 17619 states and 44856 transitions. [2022-03-01 17:59:38,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-01 17:59:38,569 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:38,569 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:38,584 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2022-03-01 17:59:38,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-03-01 17:59:38,769 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:59:38,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:38,769 INFO L85 PathProgramCache]: Analyzing trace with hash -232264139, now seen corresponding path program 131 times [2022-03-01 17:59:38,769 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:38,770 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424662122] [2022-03-01 17:59:38,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:38,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:38,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:38,876 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 31 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:59:38,876 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:38,877 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424662122] [2022-03-01 17:59:38,877 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424662122] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:38,877 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195193138] [2022-03-01 17:59:38,877 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:59:38,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:38,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:38,878 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:38,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-03-01 17:59:38,933 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-01 17:59:38,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:38,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 17:59:38,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:39,268 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:39,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:39,566 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 42 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:39,567 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195193138] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:39,567 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:39,567 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 17] total 40 [2022-03-01 17:59:39,567 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496401834] [2022-03-01 17:59:39,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:39,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-01 17:59:39,567 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:39,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-01 17:59:39,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=1289, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 17:59:39,568 INFO L87 Difference]: Start difference. First operand 17619 states and 44856 transitions. Second operand has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 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) [2022-03-01 17:59:43,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:43,750 INFO L93 Difference]: Finished difference Result 29040 states and 70961 transitions. [2022-03-01 17:59:43,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2022-03-01 17:59:43,751 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 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 40 [2022-03-01 17:59:43,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:43,805 INFO L225 Difference]: With dead ends: 29040 [2022-03-01 17:59:43,806 INFO L226 Difference]: Without dead ends: 29040 [2022-03-01 17:59:43,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19281 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=11962, Invalid=29450, Unknown=0, NotChecked=0, Total=41412 [2022-03-01 17:59:43,811 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 648 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 1549 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 1765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 1549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:43,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [648 Valid, 459 Invalid, 1765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 1549 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-01 17:59:43,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29040 states. [2022-03-01 17:59:44,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29040 to 22012. [2022-03-01 17:59:44,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22012 states, 22011 states have (on average 2.520875925673527) internal successors, (55487), 22011 states have internal predecessors, (55487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:44,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22012 states to 22012 states and 55487 transitions. [2022-03-01 17:59:44,341 INFO L78 Accepts]: Start accepts. Automaton has 22012 states and 55487 transitions. Word has length 40 [2022-03-01 17:59:44,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:44,342 INFO L470 AbstractCegarLoop]: Abstraction has 22012 states and 55487 transitions. [2022-03-01 17:59:44,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 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) [2022-03-01 17:59:44,342 INFO L276 IsEmpty]: Start isEmpty. Operand 22012 states and 55487 transitions. [2022-03-01 17:59:44,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-01 17:59:44,355 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:44,355 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:44,370 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2022-03-01 17:59:44,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-03-01 17:59:44,555 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:59:44,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:44,555 INFO L85 PathProgramCache]: Analyzing trace with hash 853771377, now seen corresponding path program 132 times [2022-03-01 17:59:44,555 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:44,556 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381927280] [2022-03-01 17:59:44,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:44,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:44,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:44,657 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:59:44,658 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:44,658 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381927280] [2022-03-01 17:59:44,658 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381927280] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:44,658 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708976726] [2022-03-01 17:59:44,658 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:59:44,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:44,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:44,659 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:44,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-03-01 17:59:44,685 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-01 17:59:44,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:44,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 17:59:44,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:45,023 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 34 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:45,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:45,295 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:45,295 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708976726] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:45,295 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:45,295 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 17] total 39 [2022-03-01 17:59:45,295 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62795125] [2022-03-01 17:59:45,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:45,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-01 17:59:45,295 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:45,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-01 17:59:45,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 17:59:45,296 INFO L87 Difference]: Start difference. First operand 22012 states and 55487 transitions. Second operand has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:47,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:47,086 INFO L93 Difference]: Finished difference Result 23071 states and 57669 transitions. [2022-03-01 17:59:47,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-01 17:59:47,086 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-03-01 17:59:47,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:47,124 INFO L225 Difference]: With dead ends: 23071 [2022-03-01 17:59:47,124 INFO L226 Difference]: Without dead ends: 23053 [2022-03-01 17:59:47,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4155 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3125, Invalid=9085, Unknown=0, NotChecked=0, Total=12210 [2022-03-01 17:59:47,125 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 331 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 1004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:47,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 261 Invalid, 1004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 909 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:59:47,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23053 states. [2022-03-01 17:59:47,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23053 to 22214. [2022-03-01 17:59:47,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22214 states, 22213 states have (on average 2.5227119254490615) internal successors, (56037), 22213 states have internal predecessors, (56037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:47,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22214 states to 22214 states and 56037 transitions. [2022-03-01 17:59:47,490 INFO L78 Accepts]: Start accepts. Automaton has 22214 states and 56037 transitions. Word has length 40 [2022-03-01 17:59:47,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:47,490 INFO L470 AbstractCegarLoop]: Abstraction has 22214 states and 56037 transitions. [2022-03-01 17:59:47,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:47,490 INFO L276 IsEmpty]: Start isEmpty. Operand 22214 states and 56037 transitions. [2022-03-01 17:59:47,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-01 17:59:47,503 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:47,503 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:47,518 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2022-03-01 17:59:47,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-03-01 17:59:47,703 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:59:47,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:47,704 INFO L85 PathProgramCache]: Analyzing trace with hash -2083943627, now seen corresponding path program 133 times [2022-03-01 17:59:47,704 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:47,704 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408577066] [2022-03-01 17:59:47,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:47,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:47,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:47,809 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:59:47,809 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:47,809 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408577066] [2022-03-01 17:59:47,809 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408577066] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:47,809 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162323587] [2022-03-01 17:59:47,809 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:59:47,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:47,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:47,810 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:47,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-03-01 17:59:47,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:47,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 17:59:47,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:48,173 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:48,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:48,494 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 42 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:48,494 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162323587] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:48,494 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:48,494 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 17] total 40 [2022-03-01 17:59:48,495 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190195307] [2022-03-01 17:59:48,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:48,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-01 17:59:48,495 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:48,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-01 17:59:48,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=372, Invalid=1268, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 17:59:48,495 INFO L87 Difference]: Start difference. First operand 22214 states and 56037 transitions. Second operand has 41 states, 41 states have (on average 2.5365853658536586) internal successors, (104), 40 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:53,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:53,015 INFO L93 Difference]: Finished difference Result 37816 states and 93511 transitions. [2022-03-01 17:59:53,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 186 states. [2022-03-01 17:59:53,015 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.5365853658536586) internal successors, (104), 40 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:59:53,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:53,087 INFO L225 Difference]: With dead ends: 37816 [2022-03-01 17:59:53,087 INFO L226 Difference]: Without dead ends: 37816 [2022-03-01 17:59:53,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23403 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=13884, Invalid=35622, Unknown=0, NotChecked=0, Total=49506 [2022-03-01 17:59:53,093 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 772 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 1404 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 1628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 1404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:53,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [772 Valid, 351 Invalid, 1628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 1404 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-01 17:59:53,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37816 states. [2022-03-01 17:59:53,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37816 to 32904. [2022-03-01 17:59:53,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32904 states, 32903 states have (on average 2.529982068504392) internal successors, (83244), 32903 states have internal predecessors, (83244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:53,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32904 states to 32904 states and 83244 transitions. [2022-03-01 17:59:53,770 INFO L78 Accepts]: Start accepts. Automaton has 32904 states and 83244 transitions. Word has length 40 [2022-03-01 17:59:53,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:53,771 INFO L470 AbstractCegarLoop]: Abstraction has 32904 states and 83244 transitions. [2022-03-01 17:59:53,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.5365853658536586) internal successors, (104), 40 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:53,771 INFO L276 IsEmpty]: Start isEmpty. Operand 32904 states and 83244 transitions. [2022-03-01 17:59:53,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-01 17:59:53,890 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:53,890 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:53,906 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2022-03-01 17:59:54,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:54,091 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:59:54,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:54,091 INFO L85 PathProgramCache]: Analyzing trace with hash 265003035, now seen corresponding path program 134 times [2022-03-01 17:59:54,092 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:54,092 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103938792] [2022-03-01 17:59:54,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:54,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:54,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:54,187 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:59:54,187 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:54,187 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103938792] [2022-03-01 17:59:54,187 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103938792] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:54,187 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711116432] [2022-03-01 17:59:54,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:59:54,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:54,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:54,188 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:54,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-03-01 17:59:54,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:59:54,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:54,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 17:59:54,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:54,535 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:54,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:54,843 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 44 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:54,843 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711116432] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:54,843 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:54,844 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 17] total 39 [2022-03-01 17:59:54,844 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525514832] [2022-03-01 17:59:54,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:54,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-01 17:59:54,844 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:54,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-01 17:59:54,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=1185, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 17:59:54,844 INFO L87 Difference]: Start difference. First operand 32904 states and 83244 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) [2022-03-01 17:59:57,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:57,557 INFO L93 Difference]: Finished difference Result 35887 states and 89458 transitions. [2022-03-01 17:59:57,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-03-01 17:59:57,557 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 [2022-03-01 17:59:57,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:57,626 INFO L225 Difference]: With dead ends: 35887 [2022-03-01 17:59:57,626 INFO L226 Difference]: Without dead ends: 35883 [2022-03-01 17:59:57,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8367 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=6364, Invalid=16588, Unknown=0, NotChecked=0, Total=22952 [2022-03-01 17:59:57,629 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 725 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 1004 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 725 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 1004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:57,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [725 Valid, 159 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 1004 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:59:57,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35883 states. [2022-03-01 17:59:58,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35883 to 32269. [2022-03-01 17:59:58,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32269 states, 32268 states have (on average 2.526465848518656) internal successors, (81524), 32268 states have internal predecessors, (81524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:58,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32269 states to 32269 states and 81524 transitions. [2022-03-01 17:59:58,261 INFO L78 Accepts]: Start accepts. Automaton has 32269 states and 81524 transitions. Word has length 40 [2022-03-01 17:59:58,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:58,261 INFO L470 AbstractCegarLoop]: Abstraction has 32269 states and 81524 transitions. [2022-03-01 17:59:58,262 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) [2022-03-01 17:59:58,262 INFO L276 IsEmpty]: Start isEmpty. Operand 32269 states and 81524 transitions. [2022-03-01 17:59:58,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-01 17:59:58,279 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:58,279 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:59:58,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2022-03-01 17:59:58,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2022-03-01 17:59:58,480 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:59:58,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:58,480 INFO L85 PathProgramCache]: Analyzing trace with hash -241343231, now seen corresponding path program 135 times [2022-03-01 17:59:58,480 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:58,480 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937565513] [2022-03-01 17:59:58,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:58,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:58,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:58,582 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 37 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:59:58,582 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:58,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937565513] [2022-03-01 17:59:58,582 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937565513] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:58,583 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003418668] [2022-03-01 17:59:58,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:59:58,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:58,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:58,584 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:58,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-03-01 17:59:58,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-01 17:59:58,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:58,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 17:59:58,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:58,951 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 33 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:58,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:59,247 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 44 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:59,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003418668] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:59,247 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:59,247 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 17] total 39 [2022-03-01 17:59:59,247 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017808556] [2022-03-01 17:59:59,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:59,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-01 17:59:59,248 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:59,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-01 17:59:59,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=1187, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 17:59:59,248 INFO L87 Difference]: Start difference. First operand 32269 states and 81524 transitions. Second operand has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:01,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:00:01,814 INFO L93 Difference]: Finished difference Result 36401 states and 90806 transitions. [2022-03-01 18:00:01,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-03-01 18:00:01,814 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-03-01 18:00:01,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:00:01,890 INFO L225 Difference]: With dead ends: 36401 [2022-03-01 18:00:01,890 INFO L226 Difference]: Without dead ends: 36389 [2022-03-01 18:00:01,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7109 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5437, Invalid=14585, Unknown=0, NotChecked=0, Total=20022 [2022-03-01 18:00:01,893 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 721 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 721 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 1185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:00:01,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [721 Valid, 162 Invalid, 1185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 942 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 18:00:01,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36389 states. [2022-03-01 18:00:02,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36389 to 31831. [2022-03-01 18:00:02,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31831 states, 31830 states have (on average 2.527615457115928) internal successors, (80454), 31830 states have internal predecessors, (80454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:02,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31831 states to 31831 states and 80454 transitions. [2022-03-01 18:00:02,633 INFO L78 Accepts]: Start accepts. Automaton has 31831 states and 80454 transitions. Word has length 40 [2022-03-01 18:00:02,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:00:02,633 INFO L470 AbstractCegarLoop]: Abstraction has 31831 states and 80454 transitions. [2022-03-01 18:00:02,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:02,633 INFO L276 IsEmpty]: Start isEmpty. Operand 31831 states and 80454 transitions. [2022-03-01 18:00:02,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-01 18:00:02,651 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:00:02,651 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:00:02,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2022-03-01 18:00:02,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:02,852 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:00:02,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:00:02,852 INFO L85 PathProgramCache]: Analyzing trace with hash -468564611, now seen corresponding path program 136 times [2022-03-01 18:00:02,853 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:00:02,853 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953342475] [2022-03-01 18:00:02,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:02,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:00:02,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:02,958 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:00:02,959 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:00:02,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953342475] [2022-03-01 18:00:02,959 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953342475] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:00:02,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868107716] [2022-03-01 18:00:02,959 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:00:02,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:02,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:00:02,960 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:00:02,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-03-01 18:00:02,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:00:02,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:00:02,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 18:00:02,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:00:03,310 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 27 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:03,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:00:03,577 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 45 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:03,577 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868107716] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:00:03,577 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:00:03,577 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 17] total 39 [2022-03-01 18:00:03,577 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683652227] [2022-03-01 18:00:03,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:00:03,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-01 18:00:03,577 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:00:03,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-01 18:00:03,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=1187, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 18:00:03,578 INFO L87 Difference]: Start difference. First operand 31831 states and 80454 transitions. Second operand has 40 states, 40 states have (on average 2.375) internal successors, (95), 39 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:05,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:00:05,971 INFO L93 Difference]: Finished difference Result 37561 states and 93690 transitions. [2022-03-01 18:00:05,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-03-01 18:00:05,971 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.375) internal successors, (95), 39 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-03-01 18:00:05,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:00:06,051 INFO L225 Difference]: With dead ends: 37561 [2022-03-01 18:00:06,051 INFO L226 Difference]: Without dead ends: 37541 [2022-03-01 18:00:06,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6226 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=4822, Invalid=13268, Unknown=0, NotChecked=0, Total=18090 [2022-03-01 18:00:06,053 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 608 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 975 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 1189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:00:06,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [608 Valid, 189 Invalid, 1189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 975 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 18:00:06,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37541 states. [2022-03-01 18:00:06,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37541 to 32042. [2022-03-01 18:00:06,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32042 states, 32041 states have (on average 2.529758746605911) internal successors, (81056), 32041 states have internal predecessors, (81056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:06,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32042 states to 32042 states and 81056 transitions. [2022-03-01 18:00:06,755 INFO L78 Accepts]: Start accepts. Automaton has 32042 states and 81056 transitions. Word has length 40 [2022-03-01 18:00:06,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:00:06,755 INFO L470 AbstractCegarLoop]: Abstraction has 32042 states and 81056 transitions. [2022-03-01 18:00:06,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.375) internal successors, (95), 39 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:06,755 INFO L276 IsEmpty]: Start isEmpty. Operand 32042 states and 81056 transitions. [2022-03-01 18:00:06,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-01 18:00:06,775 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:00:06,775 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:00:06,791 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2022-03-01 18:00:06,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:06,975 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:00:06,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:00:06,975 INFO L85 PathProgramCache]: Analyzing trace with hash 215021305, now seen corresponding path program 137 times [2022-03-01 18:00:06,976 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:00:06,976 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390602962] [2022-03-01 18:00:06,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:06,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:00:06,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:07,107 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 27 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:00:07,107 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:00:07,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390602962] [2022-03-01 18:00:07,107 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390602962] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:00:07,108 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109563864] [2022-03-01 18:00:07,108 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:00:07,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:07,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:00:07,109 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:00:07,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-03-01 18:00:07,136 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-01 18:00:07,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:00:07,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 18:00:07,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:00:07,492 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:07,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:00:07,752 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 46 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:07,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109563864] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:00:07,752 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:00:07,753 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 39 [2022-03-01 18:00:07,753 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724590754] [2022-03-01 18:00:07,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:00:07,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-01 18:00:07,753 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:00:07,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-01 18:00:07,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=1186, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 18:00:07,753 INFO L87 Difference]: Start difference. First operand 32042 states and 81056 transitions. Second operand has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:10,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:00:10,271 INFO L93 Difference]: Finished difference Result 39838 states and 99403 transitions. [2022-03-01 18:00:10,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-03-01 18:00:10,274 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-03-01 18:00:10,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:00:10,357 INFO L225 Difference]: With dead ends: 39838 [2022-03-01 18:00:10,357 INFO L226 Difference]: Without dead ends: 39810 [2022-03-01 18:00:10,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5702 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=4483, Invalid=12547, Unknown=0, NotChecked=0, Total=17030 [2022-03-01 18:00:10,358 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 664 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 664 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:00:10,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [664 Valid, 186 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 827 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:00:10,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39810 states. [2022-03-01 18:00:10,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39810 to 33837. [2022-03-01 18:00:11,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33837 states, 33836 states have (on average 2.535997162785199) internal successors, (85808), 33836 states have internal predecessors, (85808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:11,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33837 states to 33837 states and 85808 transitions. [2022-03-01 18:00:11,094 INFO L78 Accepts]: Start accepts. Automaton has 33837 states and 85808 transitions. Word has length 40 [2022-03-01 18:00:11,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:00:11,094 INFO L470 AbstractCegarLoop]: Abstraction has 33837 states and 85808 transitions. [2022-03-01 18:00:11,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:11,094 INFO L276 IsEmpty]: Start isEmpty. Operand 33837 states and 85808 transitions. [2022-03-01 18:00:11,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-01 18:00:11,116 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:00:11,116 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:00:11,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2022-03-01 18:00:11,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:11,317 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:00:11,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:00:11,318 INFO L85 PathProgramCache]: Analyzing trace with hash 11090293, now seen corresponding path program 138 times [2022-03-01 18:00:11,318 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:00:11,318 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210774862] [2022-03-01 18:00:11,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:11,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:00:11,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:11,467 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:00:11,467 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:00:11,467 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210774862] [2022-03-01 18:00:11,467 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210774862] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:00:11,467 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149080919] [2022-03-01 18:00:11,467 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:00:11,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:11,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:00:11,468 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:00:11,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-03-01 18:00:11,495 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-01 18:00:11,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:00:11,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 18:00:11,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:00:11,831 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 27 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:11,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:00:12,065 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 47 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:12,065 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149080919] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:00:12,065 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:00:12,065 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 39 [2022-03-01 18:00:12,065 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555486246] [2022-03-01 18:00:12,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:00:12,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-01 18:00:12,066 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:00:12,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-01 18:00:12,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=1184, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 18:00:12,066 INFO L87 Difference]: Start difference. First operand 33837 states and 85808 transitions. Second operand has 40 states, 40 states have (on average 2.275) internal successors, (91), 39 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) [2022-03-01 18:00:14,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:00:14,349 INFO L93 Difference]: Finished difference Result 43908 states and 109576 transitions. [2022-03-01 18:00:14,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-01 18:00:14,350 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.275) internal successors, (91), 39 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 [2022-03-01 18:00:14,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:00:14,438 INFO L225 Difference]: With dead ends: 43908 [2022-03-01 18:00:14,438 INFO L226 Difference]: Without dead ends: 43872 [2022-03-01 18:00:14,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5548 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=4373, Invalid=12397, Unknown=0, NotChecked=0, Total=16770 [2022-03-01 18:00:14,440 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 873 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 873 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:00:14,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [873 Valid, 147 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:00:14,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43872 states. [2022-03-01 18:00:15,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43872 to 40323. [2022-03-01 18:00:15,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40323 states, 40322 states have (on average 2.537894945687218) internal successors, (102333), 40322 states have internal predecessors, (102333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:15,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40323 states to 40323 states and 102333 transitions. [2022-03-01 18:00:15,329 INFO L78 Accepts]: Start accepts. Automaton has 40323 states and 102333 transitions. Word has length 40 [2022-03-01 18:00:15,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:00:15,329 INFO L470 AbstractCegarLoop]: Abstraction has 40323 states and 102333 transitions. [2022-03-01 18:00:15,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.275) internal successors, (91), 39 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) [2022-03-01 18:00:15,329 INFO L276 IsEmpty]: Start isEmpty. Operand 40323 states and 102333 transitions. [2022-03-01 18:00:15,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-01 18:00:15,353 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:00:15,353 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:00:15,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2022-03-01 18:00:15,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:15,554 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:00:15,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:00:15,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1601883377, now seen corresponding path program 139 times [2022-03-01 18:00:15,554 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:00:15,554 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110101584] [2022-03-01 18:00:15,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:15,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:00:15,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:15,681 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 33 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:00:15,681 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:00:15,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110101584] [2022-03-01 18:00:15,681 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110101584] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:00:15,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544222178] [2022-03-01 18:00:15,681 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:00:15,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:15,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:00:15,682 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:00:15,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-03-01 18:00:15,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:15,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 18:00:15,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:00:16,052 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 33 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:16,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:00:16,260 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 48 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:16,260 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544222178] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:00:16,260 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:00:16,260 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 39 [2022-03-01 18:00:16,260 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155919542] [2022-03-01 18:00:16,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:00:16,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-01 18:00:16,261 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:00:16,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-01 18:00:16,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=1181, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 18:00:16,261 INFO L87 Difference]: Start difference. First operand 40323 states and 102333 transitions. Second operand has 40 states, 40 states have (on average 2.225) internal successors, (89), 39 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:18,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:00:18,667 INFO L93 Difference]: Finished difference Result 50681 states and 126374 transitions. [2022-03-01 18:00:18,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-03-01 18:00:18,668 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.225) internal successors, (89), 39 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-03-01 18:00:18,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:00:18,805 INFO L225 Difference]: With dead ends: 50681 [2022-03-01 18:00:18,805 INFO L226 Difference]: Without dead ends: 50637 [2022-03-01 18:00:18,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5786 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=4453, Invalid=12839, Unknown=0, NotChecked=0, Total=17292 [2022-03-01 18:00:18,807 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 689 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 689 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:00:18,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [689 Valid, 211 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:00:18,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50637 states. [2022-03-01 18:00:19,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50637 to 46817. [2022-03-01 18:00:20,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46817 states, 46816 states have (on average 2.533685064935065) internal successors, (118617), 46816 states have internal predecessors, (118617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:20,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46817 states to 46817 states and 118617 transitions. [2022-03-01 18:00:20,158 INFO L78 Accepts]: Start accepts. Automaton has 46817 states and 118617 transitions. Word has length 40 [2022-03-01 18:00:20,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:00:20,158 INFO L470 AbstractCegarLoop]: Abstraction has 46817 states and 118617 transitions. [2022-03-01 18:00:20,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.225) internal successors, (89), 39 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:20,158 INFO L276 IsEmpty]: Start isEmpty. Operand 46817 states and 118617 transitions. [2022-03-01 18:00:20,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-01 18:00:20,190 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:00:20,190 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:00:20,207 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2022-03-01 18:00:20,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2022-03-01 18:00:20,390 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:00:20,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:00:20,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1345679725, now seen corresponding path program 140 times [2022-03-01 18:00:20,391 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:00:20,391 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351753411] [2022-03-01 18:00:20,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:20,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:00:20,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:20,526 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:20,526 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:00:20,526 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351753411] [2022-03-01 18:00:20,527 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351753411] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:00:20,527 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563198843] [2022-03-01 18:00:20,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:00:20,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:20,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:00:20,528 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:00:20,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-03-01 18:00:20,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:00:20,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:00:20,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 18:00:20,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:00:20,918 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:20,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:00:21,108 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:21,109 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563198843] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:00:21,109 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:00:21,109 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 39 [2022-03-01 18:00:21,109 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197537918] [2022-03-01 18:00:21,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:00:21,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-01 18:00:21,109 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:00:21,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-01 18:00:21,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=1177, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 18:00:21,110 INFO L87 Difference]: Start difference. First operand 46817 states and 118617 transitions. Second operand has 40 states, 40 states have (on average 2.175) internal successors, (87), 39 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:23,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:00:23,529 INFO L93 Difference]: Finished difference Result 50538 states and 126417 transitions. [2022-03-01 18:00:23,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-01 18:00:23,530 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.175) internal successors, (87), 39 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-03-01 18:00:23,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:00:23,651 INFO L225 Difference]: With dead ends: 50538 [2022-03-01 18:00:23,652 INFO L226 Difference]: Without dead ends: 50486 [2022-03-01 18:00:23,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5271 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3949, Invalid=11551, Unknown=0, NotChecked=0, Total=15500 [2022-03-01 18:00:23,653 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 756 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 756 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 1006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:00:23,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [756 Valid, 210 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:00:23,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50486 states. [2022-03-01 18:00:24,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50486 to 46981. [2022-03-01 18:00:24,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46981 states, 46980 states have (on average 2.5367177522349937) internal successors, (119175), 46980 states have internal predecessors, (119175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:24,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46981 states to 46981 states and 119175 transitions. [2022-03-01 18:00:24,979 INFO L78 Accepts]: Start accepts. Automaton has 46981 states and 119175 transitions. Word has length 40 [2022-03-01 18:00:24,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:00:24,979 INFO L470 AbstractCegarLoop]: Abstraction has 46981 states and 119175 transitions. [2022-03-01 18:00:24,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.175) internal successors, (87), 39 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:24,980 INFO L276 IsEmpty]: Start isEmpty. Operand 46981 states and 119175 transitions. [2022-03-01 18:00:25,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-01 18:00:25,017 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:00:25,017 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:00:25,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2022-03-01 18:00:25,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2022-03-01 18:00:25,217 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:00:25,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:00:25,218 INFO L85 PathProgramCache]: Analyzing trace with hash 843909491, now seen corresponding path program 141 times [2022-03-01 18:00:25,218 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:00:25,218 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848068928] [2022-03-01 18:00:25,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:25,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:00:25,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:25,275 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:25,275 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:00:25,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848068928] [2022-03-01 18:00:25,275 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848068928] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:00:25,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950762554] [2022-03-01 18:00:25,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:00:25,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:25,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:00:25,276 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:00:25,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-03-01 18:00:25,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-01 18:00:25,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:00:25,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-01 18:00:25,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:00:26,338 INFO L353 Elim1Store]: treesize reduction 1013, result has 21.9 percent of original size [2022-03-01 18:00:26,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 19 new quantified variables, introduced 78 case distinctions, treesize of input 224 treesize of output 373 [2022-03-01 18:00:26,408 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:00:26,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 13 new quantified variables, introduced 27 case distinctions, treesize of input 489 treesize of output 283 [2022-03-01 18:00:26,860 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:26,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:00:27,552 INFO L353 Elim1Store]: treesize reduction 128, result has 43.1 percent of original size [2022-03-01 18:00:27,553 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 232 treesize of output 214 [2022-03-01 18:00:27,617 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:00:27,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 440 treesize of output 296 [2022-03-01 18:00:28,114 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:28,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950762554] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:00:28,114 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:00:28,114 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16, 16] total 36 [2022-03-01 18:00:28,114 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615507367] [2022-03-01 18:00:28,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:00:28,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-01 18:00:28,115 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:00:28,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-01 18:00:28,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1128, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 18:00:28,115 INFO L87 Difference]: Start difference. First operand 46981 states and 119175 transitions. Second operand has 36 states, 36 states have (on average 2.8333333333333335) internal successors, (102), 36 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) [2022-03-01 18:00:28,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:00:28,761 INFO L93 Difference]: Finished difference Result 50429 states and 127823 transitions. [2022-03-01 18:00:28,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 18:00:28,761 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.8333333333333335) internal successors, (102), 36 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 42 [2022-03-01 18:00:28,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:00:29,001 INFO L225 Difference]: With dead ends: 50429 [2022-03-01 18:00:29,001 INFO L226 Difference]: Without dead ends: 50422 [2022-03-01 18:00:29,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=132, Invalid=1128, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 18:00:29,002 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 232 mSDsluCounter, 1617 mSDsCounter, 0 mSdLazyCounter, 1054 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 1293 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:00:29,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 1293 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1054 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 18:00:29,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50422 states. [2022-03-01 18:00:29,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50422 to 49976. [2022-03-01 18:00:30,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49976 states, 49975 states have (on average 2.542091045522761) internal successors, (127041), 49975 states have internal predecessors, (127041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:30,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49976 states to 49976 states and 127041 transitions. [2022-03-01 18:00:30,293 INFO L78 Accepts]: Start accepts. Automaton has 49976 states and 127041 transitions. Word has length 42 [2022-03-01 18:00:30,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:00:30,293 INFO L470 AbstractCegarLoop]: Abstraction has 49976 states and 127041 transitions. [2022-03-01 18:00:30,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.8333333333333335) internal successors, (102), 36 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) [2022-03-01 18:00:30,293 INFO L276 IsEmpty]: Start isEmpty. Operand 49976 states and 127041 transitions. [2022-03-01 18:00:30,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-01 18:00:30,325 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:00:30,325 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:00:30,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2022-03-01 18:00:30,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:30,526 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:00:30,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:00:30,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1417483661, now seen corresponding path program 142 times [2022-03-01 18:00:30,527 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:00:30,527 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286333202] [2022-03-01 18:00:30,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:30,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:00:30,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:30,581 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:00:30,581 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:00:30,581 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286333202] [2022-03-01 18:00:30,581 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286333202] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:00:30,581 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692680962] [2022-03-01 18:00:30,581 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:00:30,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:30,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:00:30,582 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:00:30,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-03-01 18:00:30,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:00:30,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:00:30,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-01 18:00:30,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:00:31,417 INFO L353 Elim1Store]: treesize reduction 749, result has 24.4 percent of original size [2022-03-01 18:00:31,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 18 new quantified variables, introduced 66 case distinctions, treesize of input 187 treesize of output 316 [2022-03-01 18:00:31,600 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:00:31,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 409 treesize of output 286 [2022-03-01 18:00:31,629 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:00:31,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:00:32,138 INFO L353 Elim1Store]: treesize reduction 72, result has 57.4 percent of original size [2022-03-01 18:00:32,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 196 treesize of output 190 [2022-03-01 18:00:32,202 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:00:32,202 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 460 treesize of output 296 [2022-03-01 18:00:32,520 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 1 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:00:32,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692680962] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:00:32,520 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:00:32,520 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16, 16] total 35 [2022-03-01 18:00:32,520 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349928385] [2022-03-01 18:00:32,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:00:32,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-01 18:00:32,520 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:00:32,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-01 18:00:32,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1066, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 18:00:32,521 INFO L87 Difference]: Start difference. First operand 49976 states and 127041 transitions. Second operand has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 35 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:33,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:00:33,197 INFO L93 Difference]: Finished difference Result 52344 states and 132850 transitions. [2022-03-01 18:00:33,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 18:00:33,197 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 35 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-03-01 18:00:33,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:00:33,326 INFO L225 Difference]: With dead ends: 52344 [2022-03-01 18:00:33,326 INFO L226 Difference]: Without dead ends: 52328 [2022-03-01 18:00:33,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=124, Invalid=1066, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 18:00:33,326 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 265 mSDsluCounter, 1697 mSDsCounter, 0 mSdLazyCounter, 1094 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 1357 SdHoareTripleChecker+Invalid, 1115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:00:33,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 1357 Invalid, 1115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1094 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 18:00:33,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52328 states. [2022-03-01 18:00:34,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52328 to 51480. [2022-03-01 18:00:34,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51480 states, 51479 states have (on average 2.547854464927446) internal successors, (131161), 51479 states have internal predecessors, (131161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:34,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51480 states to 51480 states and 131161 transitions. [2022-03-01 18:00:34,596 INFO L78 Accepts]: Start accepts. Automaton has 51480 states and 131161 transitions. Word has length 42 [2022-03-01 18:00:34,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:00:34,596 INFO L470 AbstractCegarLoop]: Abstraction has 51480 states and 131161 transitions. [2022-03-01 18:00:34,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 35 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:34,596 INFO L276 IsEmpty]: Start isEmpty. Operand 51480 states and 131161 transitions. [2022-03-01 18:00:34,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-01 18:00:34,637 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:00:34,637 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:00:34,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Forceful destruction successful, exit code 0 [2022-03-01 18:00:34,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2022-03-01 18:00:34,838 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:00:34,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:00:34,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1200959117, now seen corresponding path program 143 times [2022-03-01 18:00:34,839 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:00:34,839 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586180853] [2022-03-01 18:00:34,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:34,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:00:34,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:34,904 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:00:34,905 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:00:34,905 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586180853] [2022-03-01 18:00:34,905 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586180853] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:00:34,905 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131934336] [2022-03-01 18:00:34,905 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:00:34,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:34,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:00:34,906 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:00:34,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-03-01 18:00:34,936 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-03-01 18:00:34,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:00:34,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-01 18:00:34,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:00:35,678 INFO L353 Elim1Store]: treesize reduction 534, result has 27.9 percent of original size [2022-03-01 18:00:35,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 17 new quantified variables, introduced 55 case distinctions, treesize of input 201 treesize of output 273 [2022-03-01 18:00:36,284 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:00:36,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 359 treesize of output 286 [2022-03-01 18:00:36,314 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:00:36,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:00:36,965 INFO L353 Elim1Store]: treesize reduction 124, result has 44.9 percent of original size [2022-03-01 18:00:36,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 212 treesize of output 218 [2022-03-01 18:00:37,028 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:00:37,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 486 treesize of output 296 [2022-03-01 18:00:37,467 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 1 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:00:37,468 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131934336] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:00:37,468 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:00:37,468 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16, 16] total 34 [2022-03-01 18:00:37,468 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099065122] [2022-03-01 18:00:37,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:00:37,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-01 18:00:37,468 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:00:37,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-01 18:00:37,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1005, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 18:00:37,468 INFO L87 Difference]: Start difference. First operand 51480 states and 131161 transitions. Second operand has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 34 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:38,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:00:38,245 INFO L93 Difference]: Finished difference Result 53659 states and 136592 transitions. [2022-03-01 18:00:38,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 18:00:38,245 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 34 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-03-01 18:00:38,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:00:38,369 INFO L225 Difference]: With dead ends: 53659 [2022-03-01 18:00:38,369 INFO L226 Difference]: Without dead ends: 53634 [2022-03-01 18:00:38,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=117, Invalid=1005, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 18:00:38,370 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 210 mSDsluCounter, 2319 mSDsCounter, 0 mSdLazyCounter, 1390 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 1864 SdHoareTripleChecker+Invalid, 1418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:00:38,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 1864 Invalid, 1418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1390 Invalid, 0 Unknown, 10 Unchecked, 0.5s Time] [2022-03-01 18:00:38,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53634 states. [2022-03-01 18:00:39,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53634 to 52433. [2022-03-01 18:00:39,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52433 states, 52432 states have (on average 2.5524679584986267) internal successors, (133831), 52432 states have internal predecessors, (133831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:39,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52433 states to 52433 states and 133831 transitions. [2022-03-01 18:00:39,591 INFO L78 Accepts]: Start accepts. Automaton has 52433 states and 133831 transitions. Word has length 42 [2022-03-01 18:00:39,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:00:39,591 INFO L470 AbstractCegarLoop]: Abstraction has 52433 states and 133831 transitions. [2022-03-01 18:00:39,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 34 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:39,592 INFO L276 IsEmpty]: Start isEmpty. Operand 52433 states and 133831 transitions. [2022-03-01 18:00:39,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-01 18:00:39,634 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:00:39,634 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:00:39,650 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2022-03-01 18:00:39,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2022-03-01 18:00:39,835 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:00:39,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:00:39,835 INFO L85 PathProgramCache]: Analyzing trace with hash 720697459, now seen corresponding path program 144 times [2022-03-01 18:00:39,835 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:00:39,835 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461659611] [2022-03-01 18:00:39,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:39,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:00:39,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:39,890 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:00:39,890 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:00:39,890 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461659611] [2022-03-01 18:00:39,890 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461659611] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:00:39,890 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392649435] [2022-03-01 18:00:39,890 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:00:39,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:39,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:00:39,891 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:00:39,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-03-01 18:00:39,923 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-03-01 18:00:39,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:00:39,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-01 18:00:39,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:00:40,791 INFO L353 Elim1Store]: treesize reduction 469, result has 26.8 percent of original size [2022-03-01 18:00:40,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 18 new quantified variables, introduced 55 case distinctions, treesize of input 272 treesize of output 254 [2022-03-01 18:00:40,875 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:00:40,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 315 treesize of output 286 [2022-03-01 18:00:40,896 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:00:40,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:00:41,682 INFO L353 Elim1Store]: treesize reduction 184, result has 36.3 percent of original size [2022-03-01 18:00:41,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 220 treesize of output 242 [2022-03-01 18:00:41,746 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:00:41,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 496 treesize of output 296 [2022-03-01 18:00:42,030 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 1 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:00:42,030 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392649435] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:00:42,030 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:00:42,030 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16, 16] total 36 [2022-03-01 18:00:42,030 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153664340] [2022-03-01 18:00:42,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:00:42,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-01 18:00:42,030 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:00:42,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-01 18:00:42,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1132, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 18:00:42,031 INFO L87 Difference]: Start difference. First operand 52433 states and 133831 transitions. Second operand has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:42,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:00:42,836 INFO L93 Difference]: Finished difference Result 54610 states and 139489 transitions. [2022-03-01 18:00:42,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 18:00:42,836 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-03-01 18:00:42,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:00:42,981 INFO L225 Difference]: With dead ends: 54610 [2022-03-01 18:00:42,981 INFO L226 Difference]: Without dead ends: 54588 [2022-03-01 18:00:42,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=128, Invalid=1132, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 18:00:42,981 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 237 mSDsluCounter, 1981 mSDsCounter, 0 mSdLazyCounter, 1322 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 1602 SdHoareTripleChecker+Invalid, 1341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:00:42,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 1602 Invalid, 1341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1322 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 18:00:43,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54588 states. [2022-03-01 18:00:44,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54588 to 53500. [2022-03-01 18:00:44,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53500 states, 53499 states have (on average 2.556926297687807) internal successors, (136793), 53499 states have internal predecessors, (136793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:44,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53500 states to 53500 states and 136793 transitions. [2022-03-01 18:00:44,332 INFO L78 Accepts]: Start accepts. Automaton has 53500 states and 136793 transitions. Word has length 42 [2022-03-01 18:00:44,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:00:44,332 INFO L470 AbstractCegarLoop]: Abstraction has 53500 states and 136793 transitions. [2022-03-01 18:00:44,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:44,332 INFO L276 IsEmpty]: Start isEmpty. Operand 53500 states and 136793 transitions. [2022-03-01 18:00:44,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-01 18:00:44,373 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:00:44,373 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:00:44,390 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Ended with exit code 0 [2022-03-01 18:00:44,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2022-03-01 18:00:44,574 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:00:44,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:00:44,574 INFO L85 PathProgramCache]: Analyzing trace with hash 596729715, now seen corresponding path program 145 times [2022-03-01 18:00:44,574 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:00:44,574 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660656618] [2022-03-01 18:00:44,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:44,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:00:44,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:44,627 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:00:44,627 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:00:44,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660656618] [2022-03-01 18:00:44,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660656618] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:00:44,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382332304] [2022-03-01 18:00:44,627 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:00:44,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:44,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:00:44,628 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:00:44,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-03-01 18:00:44,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:44,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-01 18:00:44,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:00:45,236 INFO L353 Elim1Store]: treesize reduction 240, result has 37.7 percent of original size [2022-03-01 18:00:45,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 15 new quantified variables, introduced 36 case distinctions, treesize of input 205 treesize of output 201 [2022-03-01 18:00:56,164 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:00:56,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 303 treesize of output 286 [2022-03-01 18:00:56,738 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:00:56,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:00:57,268 INFO L353 Elim1Store]: treesize reduction 252, result has 30.2 percent of original size [2022-03-01 18:00:57,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 220 treesize of output 262 [2022-03-01 18:00:57,333 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:00:57,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 496 treesize of output 296 [2022-03-01 18:00:57,686 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 1 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:00:57,686 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382332304] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:00:57,686 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:00:57,686 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16, 16] total 32 [2022-03-01 18:00:57,686 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365397027] [2022-03-01 18:00:57,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:00:57,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 18:00:57,686 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:00:57,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 18:00:57,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:00:57,687 INFO L87 Difference]: Start difference. First operand 53500 states and 136793 transitions. Second operand has 32 states, 32 states have (on average 2.78125) internal successors, (89), 32 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:58,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:00:58,307 INFO L93 Difference]: Finished difference Result 56164 states and 143597 transitions. [2022-03-01 18:00:58,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 18:00:58,307 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.78125) internal successors, (89), 32 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-03-01 18:00:58,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:00:58,437 INFO L225 Difference]: With dead ends: 56164 [2022-03-01 18:00:58,437 INFO L226 Difference]: Without dead ends: 56131 [2022-03-01 18:00:58,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:00:58,437 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 212 mSDsluCounter, 2127 mSDsCounter, 0 mSdLazyCounter, 1035 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 1783 SdHoareTripleChecker+Invalid, 1266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 216 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:00:58,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 1783 Invalid, 1266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1035 Invalid, 0 Unknown, 216 Unchecked, 0.4s Time] [2022-03-01 18:00:58,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56131 states. [2022-03-01 18:00:59,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56131 to 54544. [2022-03-01 18:00:59,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54544 states, 54543 states have (on average 2.5606402288102963) internal successors, (139665), 54543 states have internal predecessors, (139665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:59,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54544 states to 54544 states and 139665 transitions. [2022-03-01 18:00:59,787 INFO L78 Accepts]: Start accepts. Automaton has 54544 states and 139665 transitions. Word has length 42 [2022-03-01 18:00:59,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:00:59,788 INFO L470 AbstractCegarLoop]: Abstraction has 54544 states and 139665 transitions. [2022-03-01 18:00:59,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.78125) internal successors, (89), 32 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:59,788 INFO L276 IsEmpty]: Start isEmpty. Operand 54544 states and 139665 transitions. [2022-03-01 18:00:59,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-01 18:00:59,827 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:00:59,827 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:00:59,843 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0 [2022-03-01 18:01:00,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:01:00,028 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:01:00,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:01:00,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1722812019, now seen corresponding path program 146 times [2022-03-01 18:01:00,029 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:01:00,029 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213527056] [2022-03-01 18:01:00,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:01:00,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:01:00,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:01:00,085 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:01:00,086 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:01:00,086 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213527056] [2022-03-01 18:01:00,086 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213527056] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:01:00,086 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312318718] [2022-03-01 18:01:00,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:01:00,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:01:00,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:01:00,087 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:01:00,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-03-01 18:01:00,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:01:00,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:01:00,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-01 18:01:00,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:01:00,450 INFO L353 Elim1Store]: treesize reduction 137, result has 48.7 percent of original size [2022-03-01 18:01:00,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 195 treesize of output 184 [2022-03-01 18:04:58,783 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:04:58,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 345 treesize of output 286 [2022-03-01 18:04:58,813 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:04:58,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:04:59,480 INFO L353 Elim1Store]: treesize reduction 328, result has 25.6 percent of original size [2022-03-01 18:04:59,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 212 treesize of output 278 [2022-03-01 18:04:59,546 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:04:59,547 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 492 treesize of output 296 [2022-03-01 18:05:00,102 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 1 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:05:00,102 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312318718] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:05:00,102 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:05:00,103 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16, 16] total 31 [2022-03-01 18:05:00,103 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738075521] [2022-03-01 18:05:00,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:05:00,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 18:05:00,103 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:05:00,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 18:05:00,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:05:00,103 INFO L87 Difference]: Start difference. First operand 54544 states and 139665 transitions. Second operand has 31 states, 31 states have (on average 2.806451612903226) internal successors, (87), 31 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:05:00,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:05:00,710 INFO L93 Difference]: Finished difference Result 57230 states and 146445 transitions. [2022-03-01 18:05:00,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 18:05:00,711 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.806451612903226) internal successors, (87), 31 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-03-01 18:05:00,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:05:00,853 INFO L225 Difference]: With dead ends: 57230 [2022-03-01 18:05:00,853 INFO L226 Difference]: Without dead ends: 57193 [2022-03-01 18:05:00,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:05:00,854 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 221 mSDsluCounter, 2117 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 1841 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:05:00,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 1841 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 916 Invalid, 0 Unknown, 196 Unchecked, 0.4s Time] [2022-03-01 18:05:00,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57193 states. [2022-03-01 18:05:02,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57193 to 55615. [2022-03-01 18:05:02,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55615 states, 55614 states have (on average 2.5645700722839573) internal successors, (142626), 55614 states have internal predecessors, (142626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:05:02,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55615 states to 55615 states and 142626 transitions. [2022-03-01 18:05:02,371 INFO L78 Accepts]: Start accepts. Automaton has 55615 states and 142626 transitions. Word has length 42 [2022-03-01 18:05:02,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:05:02,371 INFO L470 AbstractCegarLoop]: Abstraction has 55615 states and 142626 transitions. [2022-03-01 18:05:02,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.806451612903226) internal successors, (87), 31 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:05:02,371 INFO L276 IsEmpty]: Start isEmpty. Operand 55615 states and 142626 transitions. [2022-03-01 18:05:02,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-01 18:05:02,413 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:05:02,413 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:05:02,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Forceful destruction successful, exit code 0 [2022-03-01 18:05:02,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:05:02,613 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:05:02,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:05:02,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1556147571, now seen corresponding path program 147 times [2022-03-01 18:05:02,620 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:05:02,620 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474805372] [2022-03-01 18:05:02,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:05:02,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:05:02,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:05:02,676 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:05:02,677 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:05:02,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474805372] [2022-03-01 18:05:02,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474805372] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:05:02,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683547217] [2022-03-01 18:05:02,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:05:02,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:05:02,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:05:02,678 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:05:02,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-03-01 18:05:02,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-03-01 18:05:02,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:05:02,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-01 18:05:02,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:05:03,372 INFO L353 Elim1Store]: treesize reduction 130, result has 45.6 percent of original size [2022-03-01 18:05:03,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 248 treesize of output 203 [2022-03-01 18:05:03,436 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:05:03,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 447 treesize of output 286 [2022-03-01 18:05:04,019 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:05:04,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:05:04,849 INFO L353 Elim1Store]: treesize reduction 412, result has 22.1 percent of original size [2022-03-01 18:05:04,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 23 new quantified variables, introduced 66 case distinctions, treesize of input 196 treesize of output 290 [2022-03-01 18:05:04,916 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:05:04,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 494 treesize of output 296 [2022-03-01 18:05:05,521 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 1 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:05:05,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683547217] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:05:05,521 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:05:05,521 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16, 16] total 36 [2022-03-01 18:05:05,522 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808532352] [2022-03-01 18:05:05,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:05:05,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-01 18:05:05,522 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:05:05,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-01 18:05:05,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1132, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 18:05:05,522 INFO L87 Difference]: Start difference. First operand 55615 states and 142626 transitions. Second operand has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:05:06,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:05:06,301 INFO L93 Difference]: Finished difference Result 58040 states and 148792 transitions. [2022-03-01 18:05:06,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 18:05:06,302 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-03-01 18:05:06,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:05:06,446 INFO L225 Difference]: With dead ends: 58040 [2022-03-01 18:05:06,446 INFO L226 Difference]: Without dead ends: 58006 [2022-03-01 18:05:06,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=1132, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 18:05:06,447 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 334 mSDsluCounter, 1735 mSDsCounter, 0 mSdLazyCounter, 1179 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 1445 SdHoareTripleChecker+Invalid, 1201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:05:06,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 1445 Invalid, 1201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1179 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 18:05:06,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58006 states. [2022-03-01 18:05:08,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58006 to 56750. [2022-03-01 18:05:08,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56750 states, 56749 states have (on average 2.5700364764136814) internal successors, (145847), 56749 states have internal predecessors, (145847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:05:08,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56750 states to 56750 states and 145847 transitions. [2022-03-01 18:05:08,483 INFO L78 Accepts]: Start accepts. Automaton has 56750 states and 145847 transitions. Word has length 42 [2022-03-01 18:05:08,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:05:08,483 INFO L470 AbstractCegarLoop]: Abstraction has 56750 states and 145847 transitions. [2022-03-01 18:05:08,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:05:08,483 INFO L276 IsEmpty]: Start isEmpty. Operand 56750 states and 145847 transitions. [2022-03-01 18:05:08,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-01 18:05:08,523 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:05:08,523 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 18:05:08,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Forceful destruction successful, exit code 0 [2022-03-01 18:05:08,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:05:08,724 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 18:05:08,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:05:08,728 INFO L85 PathProgramCache]: Analyzing trace with hash 305402995, now seen corresponding path program 148 times [2022-03-01 18:05:08,728 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:05:08,728 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490052893] [2022-03-01 18:05:08,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:05:08,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:05:08,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:05:08,784 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 18:05:08,785 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:05:08,785 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490052893] [2022-03-01 18:05:08,785 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490052893] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:05:08,785 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970880434] [2022-03-01 18:05:08,785 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:05:08,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:05:08,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:05:08,786 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:05:08,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-03-01 18:05:08,812 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:05:08,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:05:08,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-01 18:05:08,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:05:09,083 INFO L353 Elim1Store]: treesize reduction 72, result has 57.4 percent of original size [2022-03-01 18:05:09,083 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 151 treesize of output 153 Received shutdown request... [2022-03-01 18:05:40,048 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-03-01 18:05:40,050 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-03-01 18:05:40,066 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Ended with exit code 0 [2022-03-01 18:05:40,074 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-01 18:05:40,074 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-01 18:05:40,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:05:40,250 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 43 with TraceHistMax 7,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 11ms.. [2022-03-01 18:05:40,252 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-03-01 18:05:40,252 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-03-01 18:05:40,254 INFO L732 BasicCegarLoop]: Path program histogram: [148, 2, 2, 1] [2022-03-01 18:05:40,256 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-01 18:05:40,256 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-01 18:05:40,257 INFO L202 PluginConnector]: Adding new model counter-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.03 06:05:40 BasicIcfg [2022-03-01 18:05:40,258 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-01 18:05:40,258 INFO L158 Benchmark]: Toolchain (without parser) took 752813.48ms. Allocated memory was 184.5MB in the beginning and 5.4GB in the end (delta: 5.3GB). Free memory was 141.9MB in the beginning and 3.3GB in the end (delta: -3.2GB). Peak memory consumption was 2.3GB. Max. memory is 8.0GB. [2022-03-01 18:05:40,258 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.13ms. Allocated memory is still 184.5MB. Free memory is still 143.0MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-01 18:05:40,258 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.61ms. Allocated memory is still 184.5MB. Free memory was 141.8MB in the beginning and 140.3MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-01 18:05:40,258 INFO L158 Benchmark]: Boogie Preprocessor took 13.23ms. Allocated memory is still 184.5MB. Free memory was 140.3MB in the beginning and 139.4MB in the end (delta: 946.8kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-01 18:05:40,258 INFO L158 Benchmark]: RCFGBuilder took 183.78ms. Allocated memory is still 184.5MB. Free memory was 139.3MB in the beginning and 130.5MB in the end (delta: 8.8MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2022-03-01 18:05:40,258 INFO L158 Benchmark]: TraceAbstraction took 752587.52ms. Allocated memory was 184.5MB in the beginning and 5.4GB in the end (delta: 5.3GB). Free memory was 130.0MB in the beginning and 3.3GB in the end (delta: -3.2GB). Peak memory consumption was 2.3GB. Max. memory is 8.0GB. [2022-03-01 18:05:40,258 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 184.5MB. Free memory is still 143.0MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 21.61ms. Allocated memory is still 184.5MB. Free memory was 141.8MB in the beginning and 140.3MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 13.23ms. Allocated memory is still 184.5MB. Free memory was 140.3MB in the beginning and 139.4MB in the end (delta: 946.8kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 183.78ms. Allocated memory is still 184.5MB. Free memory was 139.3MB in the beginning and 130.5MB in the end (delta: 8.8MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * TraceAbstraction took 752587.52ms. Allocated memory was 184.5MB in the beginning and 5.4GB in the end (delta: 5.3GB). Free memory was 130.0MB in the beginning and 3.3GB in the end (delta: -3.2GB). Peak memory consumption was 2.3GB. 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: 53]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 43 with TraceHistMax 7,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 11ms.. - TimeoutResultAtElement [Line: 48]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 43 with TraceHistMax 7,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 11ms.. - TimeoutResultAtElement [Line: 48]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 43 with TraceHistMax 7,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 11ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 31 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 752.5s, OverallIterations: 153, TraceHistogramMax: 7, PathProgramHistogramMax: 148, EmptinessCheckTime: 1.5s, AutomataDifference: 180.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 51181 SdHoareTripleChecker+Valid, 45.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 51181 mSDsluCounter, 53372 SdHoareTripleChecker+Invalid, 38.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 2348 IncrementalHoareTripleChecker+Unchecked, 69899 mSDsCounter, 13451 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 96328 IncrementalHoareTripleChecker+Invalid, 112127 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 13451 mSolverCounterUnsat, 4721 mSDtfsCounter, 96328 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 18403 GetRequests, 7206 SyntacticMatches, 103 SemanticMatches, 11094 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431831 ImplicationChecksByTransitivity, 155.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56750occurred in iteration=152, InterpolantAutomatonStates: 8393, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 39.0s AutomataMinimizationTime, 152 MinimizatonAttempts, 267799 StatesRemovedByMinimization, 152 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 463.7s InterpolantComputationTime, 9664 NumberOfCodeBlocks, 9664 NumberOfCodeBlocksAsserted, 747 NumberOfCheckSat, 14010 ConstructedInterpolants, 107 QuantifiedInterpolants, 181780 SizeOfPredicates, 916 NumberOfNonLiveVariables, 13685 ConjunctsInSsa, 2723 ConjunctsInUnsatCore, 446 InterpolantComputations, 6 PerfectInterpolantSequences, 7556/21626 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