/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/mult-4.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-c7b2d19 [2022-03-15 16:17:15,749 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-15 16:17:15,750 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-15 16:17:15,768 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-15 16:17:15,791 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 [2022-03-15 16:17:15,804 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-15 16:17:15,805 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-15 16:17:15,805 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-15 16:17:15,805 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-15 16:17:15,805 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-15 16:17:15,806 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-15 16:17:15,806 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-15 16:17:15,806 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-15 16:17:15,806 INFO L138 SettingsManager]: * Use SBE=true [2022-03-15 16:17:15,806 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-15 16:17:15,807 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-15 16:17:15,807 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-15 16:17:15,807 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-15 16:17:15,807 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-15 16:17:15,807 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-15 16:17:15,807 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-15 16:17:15,807 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-15 16:17:15,807 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-15 16:17:15,808 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-15 16:17:15,808 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-15 16:17:15,808 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-15 16:17:15,808 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-15 16:17:15,808 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-15 16:17:15,808 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-15 16:17:15,809 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-15 16:17:15,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 16:17:15,809 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-15 16:17:15,809 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-15 16:17:15,809 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-15 16:17:15,809 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-15 16:17:15,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-15 16:17:15,810 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-15 16:17:15,810 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-15 16:17:15,810 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-15 16:17:15,974 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-15 16:17:15,988 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-15 16:17:15,989 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-15 16:17:15,990 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-15 16:17:15,992 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-15 16:17:15,993 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/mult-4.wvr.bpl [2022-03-15 16:17:15,993 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/mult-4.wvr.bpl' [2022-03-15 16:17:16,022 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-15 16:17:16,023 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-15 16:17:16,024 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-15 16:17:16,024 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-15 16:17:16,025 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-15 16:17:16,034 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:17:16" (1/1) ... [2022-03-15 16:17:16,042 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:17:16" (1/1) ... [2022-03-15 16:17:16,047 INFO L137 Inliner]: procedures = 5, calls = 4, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-15 16:17:16,048 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-15 16:17:16,049 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-15 16:17:16,049 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-15 16:17:16,049 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-15 16:17:16,053 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:17:16" (1/1) ... [2022-03-15 16:17:16,054 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:17:16" (1/1) ... [2022-03-15 16:17:16,054 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:17:16" (1/1) ... [2022-03-15 16:17:16,054 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:17:16" (1/1) ... [2022-03-15 16:17:16,058 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:17:16" (1/1) ... [2022-03-15 16:17:16,060 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:17:16" (1/1) ... [2022-03-15 16:17:16,061 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:17:16" (1/1) ... [2022-03-15 16:17:16,066 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-15 16:17:16,066 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-15 16:17:16,067 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-15 16:17:16,067 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-15 16:17:16,068 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:17:16" (1/1) ... [2022-03-15 16:17:16,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 16:17:16,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:16,089 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) [2022-03-15 16:17:16,098 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 [2022-03-15 16:17:16,120 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-15 16:17:16,120 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-15 16:17:16,121 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-15 16:17:16,121 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-15 16:17:16,121 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-15 16:17:16,121 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-15 16:17:16,121 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-15 16:17:16,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-15 16:17:16,121 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-15 16:17:16,121 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-03-15 16:17:16,121 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-03-15 16:17:16,121 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-03-15 16:17:16,121 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2022-03-15 16:17:16,121 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-03-15 16:17:16,122 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-03-15 16:17:16,122 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-15 16:17:16,156 INFO L234 CfgBuilder]: Building ICFG [2022-03-15 16:17:16,157 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-15 16:17:16,272 INFO L275 CfgBuilder]: Performing block encoding [2022-03-15 16:17:16,288 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-15 16:17:16,288 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-15 16:17:16,290 INFO L202 PluginConnector]: Adding new model mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 04:17:16 BoogieIcfgContainer [2022-03-15 16:17:16,293 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-15 16:17:16,311 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-15 16:17:16,312 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-15 16:17:16,314 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-15 16:17:16,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:17:16" (1/2) ... [2022-03-15 16:17:16,315 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ea5b891 and model type mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 04:17:16, skipping insertion in model container [2022-03-15 16:17:16,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 04:17:16" (2/2) ... [2022-03-15 16:17:16,316 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-4.wvr.bpl [2022-03-15 16:17:16,319 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-15 16:17:16,319 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-15 16:17:16,319 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-15 16:17:16,319 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-15 16:17:16,367 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-03-15 16:17:16,407 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-15 16:17:16,412 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, 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 [2022-03-15 16:17:16,412 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-03-15 16:17:16,419 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 45 places, 36 transitions, 104 flow [2022-03-15 16:17:16,479 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 432 states, 431 states have (on average 3.8422273781902554) internal successors, (1656), 431 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:16,482 INFO L276 IsEmpty]: Start isEmpty. Operand has 432 states, 431 states have (on average 3.8422273781902554) internal successors, (1656), 431 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:16,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 16:17:16,497 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:16,497 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:17:16,498 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:17:16,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:16,501 INFO L85 PathProgramCache]: Analyzing trace with hash 2108123221, now seen corresponding path program 1 times [2022-03-15 16:17:16,510 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:16,510 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074634078] [2022-03-15 16:17:16,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:16,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:16,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:16,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:16,626 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:16,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074634078] [2022-03-15 16:17:16,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074634078] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:17:16,627 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:17:16,627 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 16:17:16,629 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256393852] [2022-03-15 16:17:16,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:17:16,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 16:17:16,632 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:16,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 16:17:16,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 16:17:16,654 INFO L87 Difference]: Start difference. First operand has 432 states, 431 states have (on average 3.8422273781902554) internal successors, (1656), 431 states have internal predecessors, (1656), 0 states have call successors, (0), 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 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:16,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:16,718 INFO L93 Difference]: Finished difference Result 857 states and 3120 transitions. [2022-03-15 16:17:16,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 16:17:16,720 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 16:17:16,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:16,735 INFO L225 Difference]: With dead ends: 857 [2022-03-15 16:17:16,735 INFO L226 Difference]: Without dead ends: 732 [2022-03-15 16:17:16,736 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 [2022-03-15 16:17:16,739 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 4 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:16,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 32 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:17:16,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2022-03-15 16:17:16,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 698. [2022-03-15 16:17:16,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 697 states have (on average 3.720229555236729) internal successors, (2593), 697 states have internal predecessors, (2593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:16,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 2593 transitions. [2022-03-15 16:17:16,895 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 2593 transitions. Word has length 22 [2022-03-15 16:17:16,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:16,896 INFO L470 AbstractCegarLoop]: Abstraction has 698 states and 2593 transitions. [2022-03-15 16:17:16,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:16,896 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 2593 transitions. [2022-03-15 16:17:16,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:17:16,907 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:16,907 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:17:16,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-15 16:17:16,907 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:17:16,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:16,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1934695763, now seen corresponding path program 1 times [2022-03-15 16:17:16,908 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:16,909 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354286630] [2022-03-15 16:17:16,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:16,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:16,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:17,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:17,017 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:17,017 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354286630] [2022-03-15 16:17:17,017 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354286630] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:17,017 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543853618] [2022-03-15 16:17:17,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:17,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:17,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:17,032 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) [2022-03-15 16:17:17,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-15 16:17:17,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:17,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-15 16:17:17,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:17,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:17,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:17,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:17,260 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543853618] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:17,261 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-15 16:17:17,261 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 9 [2022-03-15 16:17:17,261 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293148344] [2022-03-15 16:17:17,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:17:17,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 16:17:17,262 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:17,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 16:17:17,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-03-15 16:17:17,263 INFO L87 Difference]: Start difference. First operand 698 states and 2593 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:17,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:17,388 INFO L93 Difference]: Finished difference Result 1569 states and 5772 transitions. [2022-03-15 16:17:17,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 16:17:17,389 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2022-03-15 16:17:17,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:17,399 INFO L225 Difference]: With dead ends: 1569 [2022-03-15 16:17:17,399 INFO L226 Difference]: Without dead ends: 1569 [2022-03-15 16:17:17,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-03-15 16:17:17,403 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 98 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:17,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 75 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:17:17,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2022-03-15 16:17:17,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 818. [2022-03-15 16:17:17,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 817 states have (on average 3.7796817625459) internal successors, (3088), 817 states have internal predecessors, (3088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:17,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 3088 transitions. [2022-03-15 16:17:17,454 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 3088 transitions. Word has length 24 [2022-03-15 16:17:17,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:17,455 INFO L470 AbstractCegarLoop]: Abstraction has 818 states and 3088 transitions. [2022-03-15 16:17:17,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:17,456 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 3088 transitions. [2022-03-15 16:17:17,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:17:17,459 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:17,460 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:17:17,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-15 16:17:17,675 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 [2022-03-15 16:17:17,675 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:17:17,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:17,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1365945047, now seen corresponding path program 1 times [2022-03-15 16:17:17,676 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:17,676 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386508174] [2022-03-15 16:17:17,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:17,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:17,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:17,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:17,729 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:17,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386508174] [2022-03-15 16:17:17,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386508174] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:17:17,729 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:17:17,729 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-15 16:17:17,730 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778767177] [2022-03-15 16:17:17,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:17:17,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 16:17:17,730 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:17,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 16:17:17,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:17:17,731 INFO L87 Difference]: Start difference. First operand 818 states and 3088 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:17,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:17,794 INFO L93 Difference]: Finished difference Result 912 states and 3305 transitions. [2022-03-15 16:17:17,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 16:17:17,794 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2022-03-15 16:17:17,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:17,799 INFO L225 Difference]: With dead ends: 912 [2022-03-15 16:17:17,799 INFO L226 Difference]: Without dead ends: 802 [2022-03-15 16:17:17,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-15 16:17:17,800 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 64 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:17,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 50 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:17:17,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2022-03-15 16:17:17,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 786. [2022-03-15 16:17:17,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 785 states have (on average 3.7961783439490446) internal successors, (2980), 785 states have internal predecessors, (2980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:17,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 2980 transitions. [2022-03-15 16:17:17,823 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 2980 transitions. Word has length 24 [2022-03-15 16:17:17,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:17,823 INFO L470 AbstractCegarLoop]: Abstraction has 786 states and 2980 transitions. [2022-03-15 16:17:17,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:17,823 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 2980 transitions. [2022-03-15 16:17:17,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:17:17,826 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:17,826 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:17:17,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-15 16:17:17,826 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:17:17,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:17,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1105199987, now seen corresponding path program 2 times [2022-03-15 16:17:17,827 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:17,827 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111179603] [2022-03-15 16:17:17,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:17,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:17,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:17,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:17,903 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:17,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111179603] [2022-03-15 16:17:17,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111179603] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:17:17,903 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:17:17,904 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-15 16:17:17,904 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114972432] [2022-03-15 16:17:17,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:17:17,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 16:17:17,908 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:17,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 16:17:17,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:17:17,909 INFO L87 Difference]: Start difference. First operand 786 states and 2980 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:17,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:17,980 INFO L93 Difference]: Finished difference Result 1414 states and 5151 transitions. [2022-03-15 16:17:17,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 16:17:17,981 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2022-03-15 16:17:17,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:17,989 INFO L225 Difference]: With dead ends: 1414 [2022-03-15 16:17:17,989 INFO L226 Difference]: Without dead ends: 1414 [2022-03-15 16:17:17,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-15 16:17:17,991 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 86 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:17,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 57 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:17:17,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1414 states. [2022-03-15 16:17:18,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1414 to 870. [2022-03-15 16:17:18,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 869 states have (on average 3.7399309551208284) internal successors, (3250), 869 states have internal predecessors, (3250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:18,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 3250 transitions. [2022-03-15 16:17:18,026 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 3250 transitions. Word has length 24 [2022-03-15 16:17:18,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:18,026 INFO L470 AbstractCegarLoop]: Abstraction has 870 states and 3250 transitions. [2022-03-15 16:17:18,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:18,026 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 3250 transitions. [2022-03-15 16:17:18,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:17:18,029 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:18,030 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:17:18,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-15 16:17:18,030 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:17:18,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:18,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1733484731, now seen corresponding path program 2 times [2022-03-15 16:17:18,033 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:18,034 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236834691] [2022-03-15 16:17:18,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:18,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:18,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:18,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:18,109 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:18,109 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236834691] [2022-03-15 16:17:18,109 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236834691] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:17:18,110 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:17:18,110 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-15 16:17:18,110 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33884117] [2022-03-15 16:17:18,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:17:18,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 16:17:18,110 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:18,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 16:17:18,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:17:18,111 INFO L87 Difference]: Start difference. First operand 870 states and 3250 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:18,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:18,181 INFO L93 Difference]: Finished difference Result 1273 states and 4665 transitions. [2022-03-15 16:17:18,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 16:17:18,181 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2022-03-15 16:17:18,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:18,188 INFO L225 Difference]: With dead ends: 1273 [2022-03-15 16:17:18,188 INFO L226 Difference]: Without dead ends: 1203 [2022-03-15 16:17:18,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-15 16:17:18,190 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 73 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:18,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 58 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:17:18,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1203 states. [2022-03-15 16:17:18,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1203 to 872. [2022-03-15 16:17:18,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 3.7611940298507465) internal successors, (3276), 871 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:18,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 3276 transitions. [2022-03-15 16:17:18,247 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 3276 transitions. Word has length 24 [2022-03-15 16:17:18,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:18,247 INFO L470 AbstractCegarLoop]: Abstraction has 872 states and 3276 transitions. [2022-03-15 16:17:18,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:18,249 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 3276 transitions. [2022-03-15 16:17:18,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:17:18,255 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:18,255 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:17:18,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-15 16:17:18,255 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:17:18,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:18,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1394405233, now seen corresponding path program 3 times [2022-03-15 16:17:18,258 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:18,258 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335522940] [2022-03-15 16:17:18,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:18,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:18,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:18,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:18,328 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:18,328 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335522940] [2022-03-15 16:17:18,328 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335522940] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:18,328 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035274493] [2022-03-15 16:17:18,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:17:18,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:18,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:18,346 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) [2022-03-15 16:17:18,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-15 16:17:18,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 16:17:18,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:17:18,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-15 16:17:18,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:18,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:18,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:18,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:18,533 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035274493] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:18,533 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-15 16:17:18,534 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 9 [2022-03-15 16:17:18,534 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601512130] [2022-03-15 16:17:18,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:17:18,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 16:17:18,534 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:18,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 16:17:18,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-03-15 16:17:18,534 INFO L87 Difference]: Start difference. First operand 872 states and 3276 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:18,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:18,619 INFO L93 Difference]: Finished difference Result 1067 states and 3966 transitions. [2022-03-15 16:17:18,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 16:17:18,619 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2022-03-15 16:17:18,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:18,624 INFO L225 Difference]: With dead ends: 1067 [2022-03-15 16:17:18,624 INFO L226 Difference]: Without dead ends: 1017 [2022-03-15 16:17:18,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-03-15 16:17:18,625 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 67 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:18,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 66 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:17:18,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2022-03-15 16:17:18,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 712. [2022-03-15 16:17:18,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 711 states have (on average 3.828410689170183) internal successors, (2722), 711 states have internal predecessors, (2722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:18,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 2722 transitions. [2022-03-15 16:17:18,642 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 2722 transitions. Word has length 24 [2022-03-15 16:17:18,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:18,642 INFO L470 AbstractCegarLoop]: Abstraction has 712 states and 2722 transitions. [2022-03-15 16:17:18,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:18,643 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 2722 transitions. [2022-03-15 16:17:18,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:17:18,645 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:18,645 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:17:18,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-15 16:17:18,859 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 [2022-03-15 16:17:18,860 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:17:18,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:18,860 INFO L85 PathProgramCache]: Analyzing trace with hash -572986893, now seen corresponding path program 1 times [2022-03-15 16:17:18,860 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:18,860 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226957197] [2022-03-15 16:17:18,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:18,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:18,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:18,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:18,919 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:18,919 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226957197] [2022-03-15 16:17:18,919 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226957197] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:18,919 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717707172] [2022-03-15 16:17:18,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:18,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:18,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:18,920 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) [2022-03-15 16:17:18,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-15 16:17:18,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:18,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-15 16:17:18,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:19,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:19,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:19,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:19,061 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717707172] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:19,061 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-15 16:17:19,061 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 9 [2022-03-15 16:17:19,061 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133066377] [2022-03-15 16:17:19,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:17:19,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 16:17:19,062 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:19,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 16:17:19,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-03-15 16:17:19,062 INFO L87 Difference]: Start difference. First operand 712 states and 2722 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:19,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:19,128 INFO L93 Difference]: Finished difference Result 1155 states and 4394 transitions. [2022-03-15 16:17:19,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 16:17:19,128 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:17:19,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:19,134 INFO L225 Difference]: With dead ends: 1155 [2022-03-15 16:17:19,134 INFO L226 Difference]: Without dead ends: 1155 [2022-03-15 16:17:19,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-03-15 16:17:19,135 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 71 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:19,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 74 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:17:19,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states. [2022-03-15 16:17:19,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155 to 802. [2022-03-15 16:17:19,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 801 states have (on average 3.857677902621723) internal successors, (3090), 801 states have internal predecessors, (3090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:19,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 3090 transitions. [2022-03-15 16:17:19,154 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 3090 transitions. Word has length 26 [2022-03-15 16:17:19,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:19,154 INFO L470 AbstractCegarLoop]: Abstraction has 802 states and 3090 transitions. [2022-03-15 16:17:19,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:19,154 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 3090 transitions. [2022-03-15 16:17:19,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:17:19,156 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:19,156 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:17:19,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-15 16:17:19,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:19,372 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:17:19,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:19,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1469044683, now seen corresponding path program 1 times [2022-03-15 16:17:19,373 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:19,373 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334664314] [2022-03-15 16:17:19,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:19,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:19,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:19,446 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:17:19,446 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:19,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334664314] [2022-03-15 16:17:19,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334664314] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:19,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523228042] [2022-03-15 16:17:19,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:19,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:19,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:19,459 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) [2022-03-15 16:17:19,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-15 16:17:19,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:19,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-15 16:17:19,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:19,554 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:17:19,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:19,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:17:19,626 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523228042] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:19,627 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-15 16:17:19,627 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 4] total 10 [2022-03-15 16:17:19,627 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633533693] [2022-03-15 16:17:19,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:17:19,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 16:17:19,627 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:19,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 16:17:19,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-15 16:17:19,628 INFO L87 Difference]: Start difference. First operand 802 states and 3090 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:19,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:19,700 INFO L93 Difference]: Finished difference Result 1655 states and 6225 transitions. [2022-03-15 16:17:19,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 16:17:19,701 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 [2022-03-15 16:17:19,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:19,709 INFO L225 Difference]: With dead ends: 1655 [2022-03-15 16:17:19,709 INFO L226 Difference]: Without dead ends: 1655 [2022-03-15 16:17:19,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-03-15 16:17:19,710 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 82 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:19,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 68 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:17:19,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1655 states. [2022-03-15 16:17:19,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1655 to 953. [2022-03-15 16:17:19,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 953 states, 952 states have (on average 3.889705882352941) internal successors, (3703), 952 states have internal predecessors, (3703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:19,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 3703 transitions. [2022-03-15 16:17:19,766 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 3703 transitions. Word has length 28 [2022-03-15 16:17:19,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:19,766 INFO L470 AbstractCegarLoop]: Abstraction has 953 states and 3703 transitions. [2022-03-15 16:17:19,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:19,767 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 3703 transitions. [2022-03-15 16:17:19,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:17:19,769 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:19,769 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:17:19,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-15 16:17:19,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:19,983 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:17:19,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:19,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1066409119, now seen corresponding path program 2 times [2022-03-15 16:17:19,984 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:19,984 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259946950] [2022-03-15 16:17:19,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:19,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:19,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:20,101 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:17:20,102 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:20,102 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259946950] [2022-03-15 16:17:20,102 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259946950] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:20,102 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810537379] [2022-03-15 16:17:20,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:17:20,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:20,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:20,103 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) [2022-03-15 16:17:20,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-15 16:17:20,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:17:20,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:17:20,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-15 16:17:20,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:20,232 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:17:20,232 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-15 16:17:20,232 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810537379] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:17:20,232 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-15 16:17:20,232 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2022-03-15 16:17:20,233 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029240130] [2022-03-15 16:17:20,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:17:20,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 16:17:20,233 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:20,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 16:17:20,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-03-15 16:17:20,233 INFO L87 Difference]: Start difference. First operand 953 states and 3703 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:20,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:20,284 INFO L93 Difference]: Finished difference Result 1136 states and 4368 transitions. [2022-03-15 16:17:20,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 16:17:20,284 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 [2022-03-15 16:17:20,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:20,289 INFO L225 Difference]: With dead ends: 1136 [2022-03-15 16:17:20,289 INFO L226 Difference]: Without dead ends: 1088 [2022-03-15 16:17:20,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-15 16:17:20,290 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 57 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:20,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 66 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:17:20,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2022-03-15 16:17:20,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 937. [2022-03-15 16:17:20,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 936 states have (on average 3.8792735042735043) internal successors, (3631), 936 states have internal predecessors, (3631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:20,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 3631 transitions. [2022-03-15 16:17:20,311 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 3631 transitions. Word has length 28 [2022-03-15 16:17:20,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:20,312 INFO L470 AbstractCegarLoop]: Abstraction has 937 states and 3631 transitions. [2022-03-15 16:17:20,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:20,312 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 3631 transitions. [2022-03-15 16:17:20,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:17:20,315 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:20,315 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:17:20,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-15 16:17:20,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:20,533 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:17:20,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:20,533 INFO L85 PathProgramCache]: Analyzing trace with hash 364472883, now seen corresponding path program 1 times [2022-03-15 16:17:20,534 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:20,534 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465754700] [2022-03-15 16:17:20,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:20,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:20,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:20,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:17:20,607 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:20,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465754700] [2022-03-15 16:17:20,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465754700] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:20,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882654632] [2022-03-15 16:17:20,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:20,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:20,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:20,608 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) [2022-03-15 16:17:20,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-15 16:17:20,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:20,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 16:17:20,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:20,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:17:20,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:20,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:17:20,852 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882654632] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:17:20,852 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:17:20,852 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 7 [2022-03-15 16:17:20,854 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023243737] [2022-03-15 16:17:20,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:17:20,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-15 16:17:20,855 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:20,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-15 16:17:20,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-15 16:17:20,855 INFO L87 Difference]: Start difference. First operand 937 states and 3631 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 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) [2022-03-15 16:17:20,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:20,969 INFO L93 Difference]: Finished difference Result 4025 states and 15417 transitions. [2022-03-15 16:17:20,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 16:17:20,969 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 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 30 [2022-03-15 16:17:20,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:20,998 INFO L225 Difference]: With dead ends: 4025 [2022-03-15 16:17:20,999 INFO L226 Difference]: Without dead ends: 3705 [2022-03-15 16:17:20,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 54 SyntacticMatches, 6 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-03-15 16:17:20,999 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 112 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:21,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 219 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:17:21,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3705 states. [2022-03-15 16:17:21,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3705 to 2630. [2022-03-15 16:17:21,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2630 states, 2629 states have (on average 3.9790794979079496) internal successors, (10461), 2629 states have internal predecessors, (10461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:21,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2630 states to 2630 states and 10461 transitions. [2022-03-15 16:17:21,102 INFO L78 Accepts]: Start accepts. Automaton has 2630 states and 10461 transitions. Word has length 30 [2022-03-15 16:17:21,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:21,103 INFO L470 AbstractCegarLoop]: Abstraction has 2630 states and 10461 transitions. [2022-03-15 16:17:21,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 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) [2022-03-15 16:17:21,104 INFO L276 IsEmpty]: Start isEmpty. Operand 2630 states and 10461 transitions. [2022-03-15 16:17:21,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:17:21,111 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:21,111 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:17:21,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-15 16:17:21,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:21,345 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:17:21,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:21,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1940569807, now seen corresponding path program 2 times [2022-03-15 16:17:21,345 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:21,345 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933212158] [2022-03-15 16:17:21,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:21,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:21,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:21,431 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:17:21,432 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:21,432 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933212158] [2022-03-15 16:17:21,432 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933212158] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:21,432 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379942422] [2022-03-15 16:17:21,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:17:21,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:21,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:21,433 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) [2022-03-15 16:17:21,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-15 16:17:21,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:17:21,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:17:21,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:17:21,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:21,536 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:17:21,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:21,619 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:17:21,619 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379942422] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:17:21,619 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:17:21,619 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-03-15 16:17:21,619 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088601880] [2022-03-15 16:17:21,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:17:21,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 16:17:21,621 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:21,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 16:17:21,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-03-15 16:17:21,622 INFO L87 Difference]: Start difference. First operand 2630 states and 10461 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 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) [2022-03-15 16:17:21,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:21,943 INFO L93 Difference]: Finished difference Result 10282 states and 39507 transitions. [2022-03-15 16:17:21,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 16:17:21,943 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 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 32 [2022-03-15 16:17:21,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:21,977 INFO L225 Difference]: With dead ends: 10282 [2022-03-15 16:17:21,978 INFO L226 Difference]: Without dead ends: 10282 [2022-03-15 16:17:21,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2022-03-15 16:17:21,979 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 234 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:21,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 304 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:17:21,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10282 states. [2022-03-15 16:17:22,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10282 to 4060. [2022-03-15 16:17:22,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4060 states, 4059 states have (on average 4.138950480413895) internal successors, (16800), 4059 states have internal predecessors, (16800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:22,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4060 states to 4060 states and 16800 transitions. [2022-03-15 16:17:22,216 INFO L78 Accepts]: Start accepts. Automaton has 4060 states and 16800 transitions. Word has length 32 [2022-03-15 16:17:22,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:22,218 INFO L470 AbstractCegarLoop]: Abstraction has 4060 states and 16800 transitions. [2022-03-15 16:17:22,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 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) [2022-03-15 16:17:22,218 INFO L276 IsEmpty]: Start isEmpty. Operand 4060 states and 16800 transitions. [2022-03-15 16:17:22,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:17:22,230 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:22,230 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:17:22,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-15 16:17:22,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:22,446 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:17:22,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:22,447 INFO L85 PathProgramCache]: Analyzing trace with hash 706983797, now seen corresponding path program 3 times [2022-03-15 16:17:22,447 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:22,447 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104309663] [2022-03-15 16:17:22,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:22,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:22,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:22,501 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:17:22,501 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:22,501 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104309663] [2022-03-15 16:17:22,501 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104309663] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:22,501 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102904257] [2022-03-15 16:17:22,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:17:22,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:22,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:22,516 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) [2022-03-15 16:17:22,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-15 16:17:22,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 16:17:22,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:17:22,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-15 16:17:22,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:22,689 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:17:22,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:22,788 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:17:22,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102904257] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:17:22,789 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:17:22,789 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-03-15 16:17:22,789 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16317554] [2022-03-15 16:17:22,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:17:22,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 16:17:22,789 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:22,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 16:17:22,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-03-15 16:17:22,790 INFO L87 Difference]: Start difference. First operand 4060 states and 16800 transitions. Second operand has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 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) [2022-03-15 16:17:23,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:23,466 INFO L93 Difference]: Finished difference Result 15078 states and 59451 transitions. [2022-03-15 16:17:23,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 16:17:23,467 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 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 32 [2022-03-15 16:17:23,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:23,523 INFO L225 Difference]: With dead ends: 15078 [2022-03-15 16:17:23,523 INFO L226 Difference]: Without dead ends: 13577 [2022-03-15 16:17:23,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=413, Invalid=1309, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 16:17:23,525 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 462 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:23,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [462 Valid, 313 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:17:23,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13577 states. [2022-03-15 16:17:23,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13577 to 7732. [2022-03-15 16:17:23,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7732 states, 7731 states have (on average 4.210322079937912) internal successors, (32550), 7731 states have internal predecessors, (32550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:23,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7732 states to 7732 states and 32550 transitions. [2022-03-15 16:17:23,888 INFO L78 Accepts]: Start accepts. Automaton has 7732 states and 32550 transitions. Word has length 32 [2022-03-15 16:17:23,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:23,888 INFO L470 AbstractCegarLoop]: Abstraction has 7732 states and 32550 transitions. [2022-03-15 16:17:23,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 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) [2022-03-15 16:17:23,889 INFO L276 IsEmpty]: Start isEmpty. Operand 7732 states and 32550 transitions. [2022-03-15 16:17:23,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:17:23,907 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:23,907 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:17:23,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-15 16:17:24,123 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,SelfDestructingSolverStorable11 [2022-03-15 16:17:24,124 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:17:24,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:24,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1468605159, now seen corresponding path program 4 times [2022-03-15 16:17:24,124 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:24,125 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126535860] [2022-03-15 16:17:24,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:24,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:24,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:24,166 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:17:24,167 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:24,167 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126535860] [2022-03-15 16:17:24,167 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126535860] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:24,167 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348551759] [2022-03-15 16:17:24,167 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:17:24,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:24,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:24,168 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) [2022-03-15 16:17:24,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-15 16:17:24,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:17:24,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:17:24,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:17:24,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:24,285 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:17:24,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:24,390 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:17:24,390 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348551759] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:17:24,390 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:17:24,390 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 12 [2022-03-15 16:17:24,390 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554559505] [2022-03-15 16:17:24,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:17:24,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 16:17:24,390 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:24,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 16:17:24,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-03-15 16:17:24,391 INFO L87 Difference]: Start difference. First operand 7732 states and 32550 transitions. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 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) [2022-03-15 16:17:24,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:24,634 INFO L93 Difference]: Finished difference Result 10612 states and 42670 transitions. [2022-03-15 16:17:24,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 16:17:24,634 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:17:24,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:24,719 INFO L225 Difference]: With dead ends: 10612 [2022-03-15 16:17:24,719 INFO L226 Difference]: Without dead ends: 10444 [2022-03-15 16:17:24,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:17:24,723 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 219 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:24,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 141 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:17:24,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10444 states. [2022-03-15 16:17:24,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10444 to 7659. [2022-03-15 16:17:24,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7659 states, 7658 states have (on average 4.165186732828415) internal successors, (31897), 7658 states have internal predecessors, (31897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:24,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7659 states to 7659 states and 31897 transitions. [2022-03-15 16:17:24,979 INFO L78 Accepts]: Start accepts. Automaton has 7659 states and 31897 transitions. Word has length 32 [2022-03-15 16:17:24,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:24,979 INFO L470 AbstractCegarLoop]: Abstraction has 7659 states and 31897 transitions. [2022-03-15 16:17:24,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 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) [2022-03-15 16:17:24,979 INFO L276 IsEmpty]: Start isEmpty. Operand 7659 states and 31897 transitions. [2022-03-15 16:17:24,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:17:24,996 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:24,996 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:17:25,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-15 16:17:25,212 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,SelfDestructingSolverStorable12 [2022-03-15 16:17:25,213 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:17:25,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:25,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1299192005, now seen corresponding path program 5 times [2022-03-15 16:17:25,213 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:25,213 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587450452] [2022-03-15 16:17:25,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:25,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:25,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:25,280 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:17:25,280 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:25,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587450452] [2022-03-15 16:17:25,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587450452] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:25,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738917503] [2022-03-15 16:17:25,280 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:17:25,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:25,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:25,295 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) [2022-03-15 16:17:25,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-15 16:17:25,337 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 16:17:25,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:17:25,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:17:25,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:25,446 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:17:25,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:25,560 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:17:25,561 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738917503] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:17:25,561 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:17:25,561 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 6] total 13 [2022-03-15 16:17:25,561 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103060484] [2022-03-15 16:17:25,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:17:25,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 16:17:25,561 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:25,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 16:17:25,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2022-03-15 16:17:25,562 INFO L87 Difference]: Start difference. First operand 7659 states and 31897 transitions. Second operand has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 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) [2022-03-15 16:17:25,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:25,889 INFO L93 Difference]: Finished difference Result 18514 states and 73449 transitions. [2022-03-15 16:17:25,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 16:17:25,889 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 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 32 [2022-03-15 16:17:25,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:26,066 INFO L225 Difference]: With dead ends: 18514 [2022-03-15 16:17:26,067 INFO L226 Difference]: Without dead ends: 18514 [2022-03-15 16:17:26,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:17:26,067 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 271 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:26,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 280 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:17:26,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18514 states. [2022-03-15 16:17:26,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18514 to 9251. [2022-03-15 16:17:26,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9251 states, 9250 states have (on average 4.2796756756756755) internal successors, (39587), 9250 states have internal predecessors, (39587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:26,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9251 states to 9251 states and 39587 transitions. [2022-03-15 16:17:26,523 INFO L78 Accepts]: Start accepts. Automaton has 9251 states and 39587 transitions. Word has length 32 [2022-03-15 16:17:26,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:26,524 INFO L470 AbstractCegarLoop]: Abstraction has 9251 states and 39587 transitions. [2022-03-15 16:17:26,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 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) [2022-03-15 16:17:26,524 INFO L276 IsEmpty]: Start isEmpty. Operand 9251 states and 39587 transitions. [2022-03-15 16:17:26,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:17:26,545 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:26,546 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:17:26,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-15 16:17:26,763 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,SelfDestructingSolverStorable13 [2022-03-15 16:17:26,764 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:17:26,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:26,764 INFO L85 PathProgramCache]: Analyzing trace with hash 884732173, now seen corresponding path program 6 times [2022-03-15 16:17:26,764 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:26,764 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836307536] [2022-03-15 16:17:26,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:26,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:26,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:26,810 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:17:26,810 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:26,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836307536] [2022-03-15 16:17:26,810 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836307536] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:26,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306335420] [2022-03-15 16:17:26,810 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:17:26,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:26,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:26,812 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) [2022-03-15 16:17:26,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-15 16:17:26,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 16:17:26,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:17:26,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:17:26,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:26,940 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:17:26,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:27,050 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:17:27,051 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306335420] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:17:27,051 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:17:27,051 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 12 [2022-03-15 16:17:27,051 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439507253] [2022-03-15 16:17:27,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:17:27,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 16:17:27,051 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:27,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 16:17:27,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-03-15 16:17:27,052 INFO L87 Difference]: Start difference. First operand 9251 states and 39587 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 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) [2022-03-15 16:17:27,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:27,340 INFO L93 Difference]: Finished difference Result 14150 states and 57257 transitions. [2022-03-15 16:17:27,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 16:17:27,341 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 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 32 [2022-03-15 16:17:27,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:27,383 INFO L225 Difference]: With dead ends: 14150 [2022-03-15 16:17:27,383 INFO L226 Difference]: Without dead ends: 13838 [2022-03-15 16:17:27,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2022-03-15 16:17:27,384 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 237 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:27,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 176 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:17:27,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13838 states. [2022-03-15 16:17:27,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13838 to 8957. [2022-03-15 16:17:27,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8957 states, 8956 states have (on average 4.271661456007146) internal successors, (38257), 8956 states have internal predecessors, (38257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:27,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8957 states to 8957 states and 38257 transitions. [2022-03-15 16:17:27,672 INFO L78 Accepts]: Start accepts. Automaton has 8957 states and 38257 transitions. Word has length 32 [2022-03-15 16:17:27,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:27,672 INFO L470 AbstractCegarLoop]: Abstraction has 8957 states and 38257 transitions. [2022-03-15 16:17:27,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 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) [2022-03-15 16:17:27,672 INFO L276 IsEmpty]: Start isEmpty. Operand 8957 states and 38257 transitions. [2022-03-15 16:17:27,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:17:27,692 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:27,692 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:17:27,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-15 16:17:27,907 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,SelfDestructingSolverStorable14 [2022-03-15 16:17:27,908 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:17:27,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:27,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1788915635, now seen corresponding path program 7 times [2022-03-15 16:17:27,908 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:27,908 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124869078] [2022-03-15 16:17:27,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:27,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:27,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:27,960 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:17:27,960 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:27,960 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124869078] [2022-03-15 16:17:27,960 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124869078] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:27,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469490642] [2022-03-15 16:17:27,961 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:17:27,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:27,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:27,970 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) [2022-03-15 16:17:27,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-15 16:17:28,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:28,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:17:28,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:28,092 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:17:28,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:28,189 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:17:28,189 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469490642] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:17:28,190 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:17:28,190 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-03-15 16:17:28,190 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455267164] [2022-03-15 16:17:28,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:17:28,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 16:17:28,190 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:28,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 16:17:28,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-03-15 16:17:28,191 INFO L87 Difference]: Start difference. First operand 8957 states and 38257 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:28,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:28,560 INFO L93 Difference]: Finished difference Result 16495 states and 69502 transitions. [2022-03-15 16:17:28,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 16:17:28,561 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 16:17:28,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:28,627 INFO L225 Difference]: With dead ends: 16495 [2022-03-15 16:17:28,627 INFO L226 Difference]: Without dead ends: 16099 [2022-03-15 16:17:28,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:17:28,629 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 222 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:28,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 171 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:17:28,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16099 states. [2022-03-15 16:17:28,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16099 to 12463. [2022-03-15 16:17:29,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12463 states, 12462 states have (on average 4.367116032739528) internal successors, (54423), 12462 states have internal predecessors, (54423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:29,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12463 states to 12463 states and 54423 transitions. [2022-03-15 16:17:29,064 INFO L78 Accepts]: Start accepts. Automaton has 12463 states and 54423 transitions. Word has length 32 [2022-03-15 16:17:29,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:29,064 INFO L470 AbstractCegarLoop]: Abstraction has 12463 states and 54423 transitions. [2022-03-15 16:17:29,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:29,065 INFO L276 IsEmpty]: Start isEmpty. Operand 12463 states and 54423 transitions. [2022-03-15 16:17:29,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 16:17:29,099 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:29,099 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:17:29,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-15 16:17:29,315 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,SelfDestructingSolverStorable15 [2022-03-15 16:17:29,316 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:17:29,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:29,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1529464653, now seen corresponding path program 8 times [2022-03-15 16:17:29,316 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:29,316 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075353312] [2022-03-15 16:17:29,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:29,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:29,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:29,357 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:17:29,357 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:29,358 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075353312] [2022-03-15 16:17:29,358 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075353312] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:29,358 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126536106] [2022-03-15 16:17:29,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:17:29,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:29,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:29,359 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) [2022-03-15 16:17:29,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-15 16:17:29,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:17:29,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:17:29,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:17:29,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:29,528 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:17:29,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:29,622 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:17:29,623 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126536106] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:17:29,623 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:17:29,623 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-03-15 16:17:29,623 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433216113] [2022-03-15 16:17:29,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:17:29,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 16:17:29,624 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:29,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 16:17:29,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-03-15 16:17:29,624 INFO L87 Difference]: Start difference. First operand 12463 states and 54423 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 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) [2022-03-15 16:17:31,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:31,178 INFO L93 Difference]: Finished difference Result 62523 states and 252085 transitions. [2022-03-15 16:17:31,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-15 16:17:31,187 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 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 32 [2022-03-15 16:17:31,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:31,689 INFO L225 Difference]: With dead ends: 62523 [2022-03-15 16:17:31,689 INFO L226 Difference]: Without dead ends: 61411 [2022-03-15 16:17:31,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1692 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1037, Invalid=3519, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 16:17:31,691 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 744 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 744 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:31,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [744 Valid, 380 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:17:31,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61411 states. [2022-03-15 16:17:32,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61411 to 25038. [2022-03-15 16:17:32,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25038 states, 25037 states have (on average 4.435155969165635) internal successors, (111043), 25037 states have internal predecessors, (111043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:32,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25038 states to 25038 states and 111043 transitions. [2022-03-15 16:17:32,915 INFO L78 Accepts]: Start accepts. Automaton has 25038 states and 111043 transitions. Word has length 32 [2022-03-15 16:17:32,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:32,915 INFO L470 AbstractCegarLoop]: Abstraction has 25038 states and 111043 transitions. [2022-03-15 16:17:32,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 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) [2022-03-15 16:17:32,915 INFO L276 IsEmpty]: Start isEmpty. Operand 25038 states and 111043 transitions. [2022-03-15 16:17:33,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-15 16:17:33,158 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:33,158 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:17:33,178 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-03-15 16:17:33,371 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,SelfDestructingSolverStorable16 [2022-03-15 16:17:33,372 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:17:33,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:33,372 INFO L85 PathProgramCache]: Analyzing trace with hash -296790773, now seen corresponding path program 9 times [2022-03-15 16:17:33,372 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:33,372 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615009517] [2022-03-15 16:17:33,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:33,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:33,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:33,425 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:17:33,425 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:33,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615009517] [2022-03-15 16:17:33,426 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615009517] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:33,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991517121] [2022-03-15 16:17:33,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:17:33,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:33,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:33,427 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) [2022-03-15 16:17:33,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-15 16:17:33,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:17:33,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:17:33,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:17:33,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:33,611 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-15 16:17:33,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:33,735 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-15 16:17:33,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991517121] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:17:33,735 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:17:33,735 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-03-15 16:17:33,736 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373031267] [2022-03-15 16:17:33,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:17:33,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 16:17:33,736 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:33,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 16:17:33,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-03-15 16:17:33,737 INFO L87 Difference]: Start difference. First operand 25038 states and 111043 transitions. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 13 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) [2022-03-15 16:17:34,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:34,896 INFO L93 Difference]: Finished difference Result 64526 states and 272218 transitions. [2022-03-15 16:17:34,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 16:17:34,896 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 13 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 34 [2022-03-15 16:17:34,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:35,313 INFO L225 Difference]: With dead ends: 64526 [2022-03-15 16:17:35,313 INFO L226 Difference]: Without dead ends: 61671 [2022-03-15 16:17:35,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=517, Invalid=1739, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 16:17:35,314 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 690 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:35,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [690 Valid, 250 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:17:35,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61671 states. [2022-03-15 16:17:36,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61671 to 37901. [2022-03-15 16:17:36,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37901 states, 37900 states have (on average 4.5351187335092344) internal successors, (171881), 37900 states have internal predecessors, (171881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:36,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37901 states to 37901 states and 171881 transitions. [2022-03-15 16:17:36,964 INFO L78 Accepts]: Start accepts. Automaton has 37901 states and 171881 transitions. Word has length 34 [2022-03-15 16:17:36,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:36,964 INFO L470 AbstractCegarLoop]: Abstraction has 37901 states and 171881 transitions. [2022-03-15 16:17:36,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 13 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) [2022-03-15 16:17:36,965 INFO L276 IsEmpty]: Start isEmpty. Operand 37901 states and 171881 transitions. [2022-03-15 16:17:37,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-15 16:17:37,060 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:37,060 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:17:37,080 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-03-15 16:17:37,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:37,275 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:17:37,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:37,276 INFO L85 PathProgramCache]: Analyzing trace with hash -824551801, now seen corresponding path program 10 times [2022-03-15 16:17:37,276 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:37,276 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120555611] [2022-03-15 16:17:37,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:37,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:37,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:37,313 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-15 16:17:37,313 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:37,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120555611] [2022-03-15 16:17:37,313 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120555611] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:37,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41061061] [2022-03-15 16:17:37,313 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:17:37,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:37,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:37,317 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) [2022-03-15 16:17:37,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-15 16:17:37,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:17:37,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:17:37,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:17:37,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:37,449 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:17:37,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:37,534 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:17:37,534 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41061061] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:17:37,534 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:17:37,534 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-03-15 16:17:37,534 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681442760] [2022-03-15 16:17:37,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:17:37,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 16:17:37,534 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:37,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 16:17:37,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-03-15 16:17:37,535 INFO L87 Difference]: Start difference. First operand 37901 states and 171881 transitions. Second operand has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 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) [2022-03-15 16:17:39,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:39,267 INFO L93 Difference]: Finished difference Result 77131 states and 323179 transitions. [2022-03-15 16:17:39,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-15 16:17:39,268 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 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 [2022-03-15 16:17:39,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:39,813 INFO L225 Difference]: With dead ends: 77131 [2022-03-15 16:17:39,813 INFO L226 Difference]: Without dead ends: 75807 [2022-03-15 16:17:39,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=744, Invalid=2562, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 16:17:39,814 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 427 mSDsluCounter, 906 mSDsCounter, 0 mSdLazyCounter, 976 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 1019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:39,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 585 Invalid, 1019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 976 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 16:17:39,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75807 states. [2022-03-15 16:17:41,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75807 to 44705. [2022-03-15 16:17:41,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44705 states, 44704 states have (on average 4.498792054402291) internal successors, (201114), 44704 states have internal predecessors, (201114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:41,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44705 states to 44705 states and 201114 transitions. [2022-03-15 16:17:41,823 INFO L78 Accepts]: Start accepts. Automaton has 44705 states and 201114 transitions. Word has length 34 [2022-03-15 16:17:41,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:41,823 INFO L470 AbstractCegarLoop]: Abstraction has 44705 states and 201114 transitions. [2022-03-15 16:17:41,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 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) [2022-03-15 16:17:41,823 INFO L276 IsEmpty]: Start isEmpty. Operand 44705 states and 201114 transitions. [2022-03-15 16:17:41,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:17:41,951 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:41,951 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:17:41,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-15 16:17:42,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:42,167 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:17:42,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:42,167 INFO L85 PathProgramCache]: Analyzing trace with hash -2101662471, now seen corresponding path program 11 times [2022-03-15 16:17:42,167 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:42,168 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275961688] [2022-03-15 16:17:42,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:42,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:42,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:42,228 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:17:42,228 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:42,228 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275961688] [2022-03-15 16:17:42,228 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275961688] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:42,228 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360346975] [2022-03-15 16:17:42,228 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:17:42,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:42,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:42,229 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) [2022-03-15 16:17:42,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-15 16:17:42,275 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 16:17:42,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:17:42,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:17:42,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:42,380 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-15 16:17:42,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:42,517 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-15 16:17:42,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360346975] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:17:42,517 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:17:42,517 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2022-03-15 16:17:42,517 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525708329] [2022-03-15 16:17:42,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:17:42,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 16:17:42,517 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:42,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 16:17:42,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:17:42,518 INFO L87 Difference]: Start difference. First operand 44705 states and 201114 transitions. Second operand has 15 states, 15 states have (on average 4.8) internal successors, (72), 14 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) [2022-03-15 16:17:43,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:43,877 INFO L93 Difference]: Finished difference Result 69803 states and 307743 transitions. [2022-03-15 16:17:43,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 16:17:43,877 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.8) internal successors, (72), 14 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 36 [2022-03-15 16:17:43,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:44,329 INFO L225 Difference]: With dead ends: 69803 [2022-03-15 16:17:44,330 INFO L226 Difference]: Without dead ends: 67685 [2022-03-15 16:17:44,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:17:44,330 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 298 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:44,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 236 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:17:44,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67685 states. [2022-03-15 16:17:46,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67685 to 55906. [2022-03-15 16:17:46,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55906 states, 55905 states have (on average 4.5403810034880605) internal successors, (253830), 55905 states have internal predecessors, (253830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:46,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55906 states to 55906 states and 253830 transitions. [2022-03-15 16:17:46,540 INFO L78 Accepts]: Start accepts. Automaton has 55906 states and 253830 transitions. Word has length 36 [2022-03-15 16:17:46,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:46,541 INFO L470 AbstractCegarLoop]: Abstraction has 55906 states and 253830 transitions. [2022-03-15 16:17:46,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.8) internal successors, (72), 14 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) [2022-03-15 16:17:46,541 INFO L276 IsEmpty]: Start isEmpty. Operand 55906 states and 253830 transitions. [2022-03-15 16:17:47,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:17:47,015 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:47,015 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:17:47,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-15 16:17:47,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:47,232 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:17:47,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:47,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1582117723, now seen corresponding path program 12 times [2022-03-15 16:17:47,232 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:47,232 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062508442] [2022-03-15 16:17:47,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:47,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:47,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:47,295 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 16:17:47,295 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:47,295 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062508442] [2022-03-15 16:17:47,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062508442] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:47,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776855453] [2022-03-15 16:17:47,303 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:17:47,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:47,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:47,304 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) [2022-03-15 16:17:47,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-15 16:17:47,332 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:17:47,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:17:47,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:17:47,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:47,426 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:17:47,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:47,541 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:17:47,542 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776855453] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:17:47,542 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:17:47,542 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 15 [2022-03-15 16:17:47,542 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216144220] [2022-03-15 16:17:47,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:17:47,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 16:17:47,542 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:47,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 16:17:47,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:17:47,543 INFO L87 Difference]: Start difference. First operand 55906 states and 253830 transitions. Second operand has 16 states, 16 states have (on average 4.625) internal successors, (74), 15 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) [2022-03-15 16:17:49,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:49,243 INFO L93 Difference]: Finished difference Result 123288 states and 564276 transitions. [2022-03-15 16:17:49,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 16:17:49,244 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.625) internal successors, (74), 15 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 36 [2022-03-15 16:17:49,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:50,321 INFO L225 Difference]: With dead ends: 123288 [2022-03-15 16:17:50,321 INFO L226 Difference]: Without dead ends: 121266 [2022-03-15 16:17:50,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=215, Invalid=435, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:17:50,322 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 301 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:50,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 406 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:17:50,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121266 states. [2022-03-15 16:17:53,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121266 to 80926. [2022-03-15 16:17:53,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80926 states, 80925 states have (on average 4.637899289465555) internal successors, (375322), 80925 states have internal predecessors, (375322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:54,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80926 states to 80926 states and 375322 transitions. [2022-03-15 16:17:54,254 INFO L78 Accepts]: Start accepts. Automaton has 80926 states and 375322 transitions. Word has length 36 [2022-03-15 16:17:54,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:54,254 INFO L470 AbstractCegarLoop]: Abstraction has 80926 states and 375322 transitions. [2022-03-15 16:17:54,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.625) internal successors, (74), 15 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) [2022-03-15 16:17:54,254 INFO L276 IsEmpty]: Start isEmpty. Operand 80926 states and 375322 transitions. [2022-03-15 16:17:54,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-15 16:17:54,542 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:54,542 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:17:54,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-15 16:17:54,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:54,756 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:17:54,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:54,756 INFO L85 PathProgramCache]: Analyzing trace with hash 69707247, now seen corresponding path program 13 times [2022-03-15 16:17:54,756 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:54,757 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623011018] [2022-03-15 16:17:54,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:54,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:55,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:55,211 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:17:55,212 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:55,212 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623011018] [2022-03-15 16:17:55,212 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623011018] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:55,212 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091269824] [2022-03-15 16:17:55,212 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:17:55,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:55,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:55,213 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) [2022-03-15 16:17:55,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-15 16:17:55,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:55,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 16:17:55,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:55,396 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:17:55,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:55,526 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:17:55,526 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091269824] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:17:55,526 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:17:55,526 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 9 [2022-03-15 16:17:55,526 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342635234] [2022-03-15 16:17:55,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:17:55,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 16:17:55,527 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:55,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 16:17:55,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-15 16:17:55,528 INFO L87 Difference]: Start difference. First operand 80926 states and 375322 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 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) [2022-03-15 16:17:58,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:58,226 INFO L93 Difference]: Finished difference Result 199767 states and 935269 transitions. [2022-03-15 16:17:58,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 16:17:58,226 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 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 38 [2022-03-15 16:17:58,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:59,394 INFO L225 Difference]: With dead ends: 199767 [2022-03-15 16:17:59,395 INFO L226 Difference]: Without dead ends: 196764 [2022-03-15 16:17:59,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 72 SyntacticMatches, 6 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-15 16:17:59,395 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 170 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:59,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 571 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:18:00,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196764 states. [2022-03-15 16:18:04,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196764 to 139705. [2022-03-15 16:18:05,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139705 states, 139704 states have (on average 4.742784744889194) internal successors, (662586), 139704 states have internal predecessors, (662586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:06,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139705 states to 139705 states and 662586 transitions. [2022-03-15 16:18:06,719 INFO L78 Accepts]: Start accepts. Automaton has 139705 states and 662586 transitions. Word has length 38 [2022-03-15 16:18:06,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:18:06,720 INFO L470 AbstractCegarLoop]: Abstraction has 139705 states and 662586 transitions. [2022-03-15 16:18:06,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 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) [2022-03-15 16:18:06,720 INFO L276 IsEmpty]: Start isEmpty. Operand 139705 states and 662586 transitions. [2022-03-15 16:18:07,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-15 16:18:07,650 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:18:07,650 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:18:07,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-15 16:18:07,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:07,865 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:18:07,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:18:07,865 INFO L85 PathProgramCache]: Analyzing trace with hash 7577325, now seen corresponding path program 14 times [2022-03-15 16:18:07,865 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:18:07,866 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22525302] [2022-03-15 16:18:07,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:18:07,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:18:07,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:18:07,971 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-15 16:18:07,972 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:18:07,972 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22525302] [2022-03-15 16:18:07,972 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22525302] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:18:07,972 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002874037] [2022-03-15 16:18:07,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:18:07,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:07,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:18:07,973 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) [2022-03-15 16:18:07,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-15 16:18:08,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:18:08,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:18:08,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-15 16:18:08,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:18:08,188 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-15 16:18:08,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:18:08,319 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-15 16:18:08,319 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002874037] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:18:08,320 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:18:08,320 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-03-15 16:18:08,320 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961372030] [2022-03-15 16:18:08,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:18:08,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:18:08,320 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:18:08,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:18:08,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:18:08,321 INFO L87 Difference]: Start difference. First operand 139705 states and 662586 transitions. Second operand has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 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) [2022-03-15 16:18:16,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:18:16,815 INFO L93 Difference]: Finished difference Result 469712 states and 2082413 transitions. [2022-03-15 16:18:16,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-03-15 16:18:16,816 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 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 40 [2022-03-15 16:18:16,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:18:20,420 INFO L225 Difference]: With dead ends: 469712 [2022-03-15 16:18:20,420 INFO L226 Difference]: Without dead ends: 463987 [2022-03-15 16:18:20,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4939 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2857, Invalid=9799, Unknown=0, NotChecked=0, Total=12656 [2022-03-15 16:18:20,423 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 874 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 1070 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 874 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 1070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:18:20,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [874 Valid, 570 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 1070 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 16:18:21,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463987 states. [2022-03-15 16:18:35,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463987 to 225649. [2022-03-15 16:18:35,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225649 states, 225648 states have (on average 4.718725625753386) internal successors, (1064771), 225648 states have internal predecessors, (1064771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:37,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225649 states to 225649 states and 1064771 transitions. [2022-03-15 16:18:37,712 INFO L78 Accepts]: Start accepts. Automaton has 225649 states and 1064771 transitions. Word has length 40 [2022-03-15 16:18:37,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:18:37,713 INFO L470 AbstractCegarLoop]: Abstraction has 225649 states and 1064771 transitions. [2022-03-15 16:18:37,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 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) [2022-03-15 16:18:37,713 INFO L276 IsEmpty]: Start isEmpty. Operand 225649 states and 1064771 transitions. [2022-03-15 16:18:38,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-15 16:18:38,855 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:18:38,855 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:18:38,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-15 16:18:39,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:39,067 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-15 16:18:39,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:18:39,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1204202959, now seen corresponding path program 15 times [2022-03-15 16:18:39,068 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:18:39,068 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369355038] [2022-03-15 16:18:39,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:18:39,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:18:39,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:18:39,139 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-15 16:18:39,139 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:18:39,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369355038] [2022-03-15 16:18:39,139 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369355038] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:18:39,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413089017] [2022-03-15 16:18:39,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:18:39,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:39,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:18:39,140 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) [2022-03-15 16:18:39,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-15 16:18:39,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 16:18:39,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:18:39,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-15 16:18:39,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:18:39,318 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-15 16:18:39,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:18:39,439 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-15 16:18:39,439 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413089017] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:18:39,439 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:18:39,439 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-03-15 16:18:39,439 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130393126] [2022-03-15 16:18:39,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:18:39,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 16:18:39,440 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:18:39,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 16:18:39,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2022-03-15 16:18:39,440 INFO L87 Difference]: Start difference. First operand 225649 states and 1064771 transitions. Second operand has 19 states, 19 states have (on average 4.473684210526316) internal successors, (85), 18 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) [2022-03-15 16:18:55,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:18:55,425 INFO L93 Difference]: Finished difference Result 857172 states and 3917001 transitions. [2022-03-15 16:18:55,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-15 16:18:55,432 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.473684210526316) internal successors, (85), 18 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 40 [2022-03-15 16:18:55,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:19:05,285 INFO L225 Difference]: With dead ends: 857172 [2022-03-15 16:19:05,285 INFO L226 Difference]: Without dead ends: 830239 [2022-03-15 16:19:05,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2076 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1440, Invalid=4880, Unknown=0, NotChecked=0, Total=6320 [2022-03-15 16:19:05,286 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 811 mSDsluCounter, 875 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 811 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 1227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:19:05,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [811 Valid, 524 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1095 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-15 16:19:07,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830239 states. [2022-03-15 16:19:41,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830239 to 585545. [2022-03-15 16:19:43,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585545 states, 585544 states have (on average 4.753137253562499) internal successors, (2783171), 585544 states have internal predecessors, (2783171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)