/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-MCRwithDepranks-BasicCegarLoop.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-fun.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-44898dd [2022-02-10 03:48:04,648 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-10 03:48:04,650 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-10 03:48:04,711 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-10 03:48:04,744 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-MCRwithDepranks-BasicCegarLoop.epf [2022-02-10 03:48:04,767 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-10 03:48:04,768 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-10 03:48:04,768 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-10 03:48:04,768 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-10 03:48:04,769 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-10 03:48:04,769 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-10 03:48:04,769 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-10 03:48:04,769 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-10 03:48:04,769 INFO L138 SettingsManager]: * Use SBE=true [2022-02-10 03:48:04,770 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-10 03:48:04,770 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-10 03:48:04,770 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-10 03:48:04,770 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-10 03:48:04,770 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-10 03:48:04,771 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-10 03:48:04,771 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-10 03:48:04,771 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-10 03:48:04,771 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-10 03:48:04,771 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-10 03:48:04,771 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-10 03:48:04,771 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-10 03:48:04,771 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-10 03:48:04,771 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-10 03:48:04,771 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-10 03:48:04,771 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-10 03:48:04,771 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-10 03:48:04,772 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-10 03:48:04,772 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-10 03:48:04,772 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-10 03:48:04,772 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-10 03:48:04,772 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-10 03:48:04,772 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-10 03:48:04,772 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-10 03:48:04,772 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=MCR_WITH_DEPRANKS [2022-02-10 03:48:04,772 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-10 03:48:04,940 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-10 03:48:04,960 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-10 03:48:04,962 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-10 03:48:04,962 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-10 03:48:04,963 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-10 03:48:04,964 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-fun.wvr.bpl [2022-02-10 03:48:04,964 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-fun.wvr.bpl' [2022-02-10 03:48:04,982 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-10 03:48:04,983 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-10 03:48:04,983 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-10 03:48:04,984 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-10 03:48:04,984 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-10 03:48:04,991 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:48:04" (1/1) ... [2022-02-10 03:48:04,996 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:48:04" (1/1) ... [2022-02-10 03:48:05,001 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-10 03:48:05,002 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-10 03:48:05,004 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-10 03:48:05,004 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-10 03:48:05,004 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-10 03:48:05,009 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:48:04" (1/1) ... [2022-02-10 03:48:05,010 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:48:04" (1/1) ... [2022-02-10 03:48:05,011 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:48:04" (1/1) ... [2022-02-10 03:48:05,011 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:48:04" (1/1) ... [2022-02-10 03:48:05,015 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:48:04" (1/1) ... [2022-02-10 03:48:05,018 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:48:04" (1/1) ... [2022-02-10 03:48:05,020 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:48:04" (1/1) ... [2022-02-10 03:48:05,024 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-10 03:48:05,026 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-10 03:48:05,026 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-10 03:48:05,026 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-10 03:48:05,027 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:48:04" (1/1) ... [2022-02-10 03:48:05,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-10 03:48:05,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:48:05,056 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-10 03:48:05,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-10 03:48:05,083 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-10 03:48:05,084 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-10 03:48:05,084 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-10 03:48:05,084 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-10 03:48:05,084 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-10 03:48:05,084 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-10 03:48:05,084 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-10 03:48:05,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-10 03:48:05,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-10 03:48:05,084 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-02-10 03:48:05,084 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-02-10 03:48:05,085 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-02-10 03:48:05,085 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-10 03:48:05,123 INFO L234 CfgBuilder]: Building ICFG [2022-02-10 03:48:05,124 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-10 03:48:05,213 INFO L275 CfgBuilder]: Performing block encoding [2022-02-10 03:48:05,222 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-10 03:48:05,223 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-10 03:48:05,224 INFO L202 PluginConnector]: Adding new model min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.02 03:48:05 BoogieIcfgContainer [2022-02-10 03:48:05,224 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-10 03:48:05,225 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-10 03:48:05,225 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-10 03:48:05,241 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-10 03:48:05,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:48:04" (1/2) ... [2022-02-10 03:48:05,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33136bb7 and model type min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.02 03:48:05, skipping insertion in model container [2022-02-10 03:48:05,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.02 03:48:05" (2/2) ... [2022-02-10 03:48:05,243 INFO L111 eAbstractionObserver]: Analyzing ICFG min-fun.wvr.bpl [2022-02-10 03:48:05,246 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-10 03:48:05,246 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-10 03:48:05,246 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-10 03:48:05,246 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-10 03:48:05,271 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-02-10 03:48:05,303 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-10 03:48:05,307 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 [2022-02-10 03:48:05,308 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-02-10 03:48:05,314 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2022-02-10 03:48:05,357 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:10,911 INFO L104 alCausalityReduction]: MaximalCausalityReduction evaluated 526838 transitions and produced 183322 states. [2022-02-10 03:48:11,860 INFO L276 IsEmpty]: Start isEmpty. Operand has 183322 states, 122589 states have (on average 2.0976759741901803) internal successors, (257152), 183321 states have internal predecessors, (257152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:12,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-10 03:48:12,108 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:48:12,109 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:48:12,109 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:48:12,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:48:12,113 INFO L85 PathProgramCache]: Analyzing trace with hash -234537446, now seen corresponding path program 1 times [2022-02-10 03:48:12,125 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:48:12,126 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946996795] [2022-02-10 03:48:12,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:48:12,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:48:12,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:48:12,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:48:12,284 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:48:12,284 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946996795] [2022-02-10 03:48:12,284 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946996795] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-10 03:48:12,285 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-10 03:48:12,285 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-10 03:48:12,286 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092225539] [2022-02-10 03:48:12,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-10 03:48:12,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-10 03:48:12,288 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:48:12,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-10 03:48:12,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-10 03:48:13,402 INFO L87 Difference]: Start difference. First operand has 183322 states, 122589 states have (on average 2.0976759741901803) internal successors, (257152), 183321 states have internal predecessors, (257152), 0 states have call successors, (0), 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 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:16,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:48:16,837 INFO L93 Difference]: Finished difference Result 183318 states and 257148 transitions. [2022-02-10 03:48:16,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-10 03:48:16,840 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-10 03:48:16,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:48:17,201 INFO L225 Difference]: With dead ends: 183318 [2022-02-10 03:48:17,202 INFO L226 Difference]: Without dead ends: 56655 [2022-02-10 03:48:17,203 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 [2022-02-10 03:48:17,208 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-10 03:48:17,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 27 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-10 03:48:17,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56655 states. [2022-02-10 03:48:17,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56655 to 123. [2022-02-10 03:48:17,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.0081967213114753) internal successors, (245), 122 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:17,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 245 transitions. [2022-02-10 03:48:17,871 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 245 transitions. Word has length 18 [2022-02-10 03:48:17,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:48:17,872 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 245 transitions. [2022-02-10 03:48:17,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:17,874 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 245 transitions. [2022-02-10 03:48:17,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-10 03:48:17,877 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:48:17,877 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] [2022-02-10 03:48:17,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-10 03:48:17,878 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:48:17,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:48:17,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1872873864, now seen corresponding path program 1 times [2022-02-10 03:48:17,881 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:48:17,885 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317265659] [2022-02-10 03:48:17,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:48:17,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:48:17,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:48:17,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:48:17,927 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:48:17,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317265659] [2022-02-10 03:48:17,928 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317265659] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-10 03:48:17,928 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-10 03:48:17,928 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-10 03:48:17,934 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267181529] [2022-02-10 03:48:17,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-10 03:48:17,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-10 03:48:17,935 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:48:17,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-10 03:48:17,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-10 03:48:17,936 INFO L87 Difference]: Start difference. First operand 123 states and 245 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:17,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:48:17,986 INFO L93 Difference]: Finished difference Result 131 states and 253 transitions. [2022-02-10 03:48:17,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-10 03:48:17,986 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-10 03:48:17,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:48:17,987 INFO L225 Difference]: With dead ends: 131 [2022-02-10 03:48:17,988 INFO L226 Difference]: Without dead ends: 131 [2022-02-10 03:48:17,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-10 03:48:17,989 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 32 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-10 03:48:17,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 15 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-10 03:48:17,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-02-10 03:48:17,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 122. [2022-02-10 03:48:17,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.9834710743801653) internal successors, (240), 121 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:18,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 240 transitions. [2022-02-10 03:48:18,000 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 240 transitions. Word has length 20 [2022-02-10 03:48:18,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:48:18,000 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 240 transitions. [2022-02-10 03:48:18,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:18,000 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 240 transitions. [2022-02-10 03:48:18,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-10 03:48:18,001 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:48:18,001 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] [2022-02-10 03:48:18,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-10 03:48:18,002 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:48:18,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:48:18,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1615051400, now seen corresponding path program 1 times [2022-02-10 03:48:18,003 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:48:18,003 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564804528] [2022-02-10 03:48:18,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:48:18,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:48:18,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:48:18,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:48:18,051 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:48:18,051 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564804528] [2022-02-10 03:48:18,051 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564804528] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-10 03:48:18,051 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-10 03:48:18,051 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-10 03:48:18,051 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48870428] [2022-02-10 03:48:18,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-10 03:48:18,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-10 03:48:18,052 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:48:18,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-10 03:48:18,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-10 03:48:18,052 INFO L87 Difference]: Start difference. First operand 122 states and 240 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:18,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:48:18,101 INFO L93 Difference]: Finished difference Result 173 states and 340 transitions. [2022-02-10 03:48:18,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-10 03:48:18,102 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-02-10 03:48:18,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:48:18,103 INFO L225 Difference]: With dead ends: 173 [2022-02-10 03:48:18,103 INFO L226 Difference]: Without dead ends: 173 [2022-02-10 03:48:18,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-10 03:48:18,105 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 69 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-10 03:48:18,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 13 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-10 03:48:18,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-02-10 03:48:18,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 143. [2022-02-10 03:48:18,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.971830985915493) internal successors, (280), 142 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:18,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 280 transitions. [2022-02-10 03:48:18,115 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 280 transitions. Word has length 20 [2022-02-10 03:48:18,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:48:18,115 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 280 transitions. [2022-02-10 03:48:18,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:18,115 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 280 transitions. [2022-02-10 03:48:18,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-10 03:48:18,115 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:48:18,116 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] [2022-02-10 03:48:18,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-10 03:48:18,116 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:48:18,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:48:18,116 INFO L85 PathProgramCache]: Analyzing trace with hash 196648534, now seen corresponding path program 1 times [2022-02-10 03:48:18,117 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:48:18,117 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705802421] [2022-02-10 03:48:18,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:48:18,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:48:18,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:48:18,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:48:18,426 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:48:18,427 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705802421] [2022-02-10 03:48:18,427 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705802421] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:48:18,428 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510883929] [2022-02-10 03:48:18,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:48:18,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:48:18,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:48:18,432 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:48:18,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-10 03:48:18,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:48:18,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:48:18,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:48:18,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:48:18,898 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2022-02-10 03:48:19,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:48:19,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:48:19,342 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:48:19,343 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 67 [2022-02-10 03:48:19,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:48:19,844 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510883929] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:48:19,844 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:48:19,844 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-02-10 03:48:19,844 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594302776] [2022-02-10 03:48:19,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:48:19,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:48:19,845 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:48:19,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:48:19,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:48:19,848 INFO L87 Difference]: Start difference. First operand 143 states and 280 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 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) [2022-02-10 03:48:20,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:48:20,127 INFO L93 Difference]: Finished difference Result 237 states and 443 transitions. [2022-02-10 03:48:20,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-10 03:48:20,127 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 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 22 [2022-02-10 03:48:20,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:48:20,128 INFO L225 Difference]: With dead ends: 237 [2022-02-10 03:48:20,128 INFO L226 Difference]: Without dead ends: 232 [2022-02-10 03:48:20,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:48:20,129 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 112 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:48:20,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 54 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:48:20,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-02-10 03:48:20,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 158. [2022-02-10 03:48:20,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.9426751592356688) internal successors, (305), 157 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:20,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 305 transitions. [2022-02-10 03:48:20,133 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 305 transitions. Word has length 22 [2022-02-10 03:48:20,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:48:20,133 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 305 transitions. [2022-02-10 03:48:20,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 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) [2022-02-10 03:48:20,133 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 305 transitions. [2022-02-10 03:48:20,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-10 03:48:20,134 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:48:20,134 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] [2022-02-10 03:48:20,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-10 03:48:20,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:48:20,344 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:48:20,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:48:20,344 INFO L85 PathProgramCache]: Analyzing trace with hash 805974298, now seen corresponding path program 2 times [2022-02-10 03:48:20,344 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:48:20,344 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120632751] [2022-02-10 03:48:20,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:48:20,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:48:20,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:48:20,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:48:20,532 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:48:20,532 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120632751] [2022-02-10 03:48:20,532 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120632751] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:48:20,532 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125666004] [2022-02-10 03:48:20,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:48:20,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:48:20,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:48:20,534 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:48:20,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-10 03:48:20,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:48:20,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:48:20,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:48:20,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:48:20,777 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:48:20,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 41 [2022-02-10 03:48:21,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:48:21,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:48:21,356 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:48:21,357 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 69 [2022-02-10 03:48:21,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:48:21,698 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125666004] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:48:21,698 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:48:21,699 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 18 [2022-02-10 03:48:21,699 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089590925] [2022-02-10 03:48:21,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:48:21,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:48:21,699 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:48:21,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:48:21,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:48:21,700 INFO L87 Difference]: Start difference. First operand 158 states and 305 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:22,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:48:22,484 INFO L93 Difference]: Finished difference Result 271 states and 507 transitions. [2022-02-10 03:48:22,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-10 03:48:22,485 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 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 22 [2022-02-10 03:48:22,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:48:22,485 INFO L225 Difference]: With dead ends: 271 [2022-02-10 03:48:22,486 INFO L226 Difference]: Without dead ends: 265 [2022-02-10 03:48:22,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=217, Invalid=713, Unknown=0, NotChecked=0, Total=930 [2022-02-10 03:48:22,486 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 104 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:48:22,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 77 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 03:48:22,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-02-10 03:48:22,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 159. [2022-02-10 03:48:22,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.9430379746835442) internal successors, (307), 158 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:22,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 307 transitions. [2022-02-10 03:48:22,490 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 307 transitions. Word has length 22 [2022-02-10 03:48:22,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:48:22,490 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 307 transitions. [2022-02-10 03:48:22,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:22,490 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 307 transitions. [2022-02-10 03:48:22,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-10 03:48:22,491 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:48:22,491 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] [2022-02-10 03:48:22,513 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-02-10 03:48:22,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:48:22,691 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:48:22,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:48:22,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1394777570, now seen corresponding path program 3 times [2022-02-10 03:48:22,692 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:48:22,692 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914889728] [2022-02-10 03:48:22,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:48:22,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:48:22,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:48:22,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:48:22,872 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:48:22,872 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914889728] [2022-02-10 03:48:22,872 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914889728] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:48:22,872 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457884173] [2022-02-10 03:48:22,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:48:22,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:48:22,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:48:22,874 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:48:22,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-10 03:48:22,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-10 03:48:22,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:48:22,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:48:22,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:48:23,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2022-02-10 03:48:23,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:48:23,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:48:23,329 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:48:23,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 67 [2022-02-10 03:48:23,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:48:23,668 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457884173] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:48:23,668 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:48:23,668 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-02-10 03:48:23,668 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111376090] [2022-02-10 03:48:23,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:48:23,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-10 03:48:23,669 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:48:23,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-10 03:48:23,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-02-10 03:48:23,669 INFO L87 Difference]: Start difference. First operand 159 states and 307 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:24,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:48:24,152 INFO L93 Difference]: Finished difference Result 258 states and 477 transitions. [2022-02-10 03:48:24,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 03:48:24,153 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 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 22 [2022-02-10 03:48:24,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:48:24,153 INFO L225 Difference]: With dead ends: 258 [2022-02-10 03:48:24,153 INFO L226 Difference]: Without dead ends: 252 [2022-02-10 03:48:24,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2022-02-10 03:48:24,154 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 80 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:48:24,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 142 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:48:24,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-02-10 03:48:24,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 168. [2022-02-10 03:48:24,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.9221556886227544) internal successors, (321), 167 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:24,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 321 transitions. [2022-02-10 03:48:24,157 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 321 transitions. Word has length 22 [2022-02-10 03:48:24,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:48:24,157 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 321 transitions. [2022-02-10 03:48:24,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:24,157 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 321 transitions. [2022-02-10 03:48:24,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:48:24,158 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:48:24,158 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] [2022-02-10 03:48:24,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-10 03:48:24,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:48:24,362 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:48:24,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:48:24,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1778530228, now seen corresponding path program 4 times [2022-02-10 03:48:24,363 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:48:24,363 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143988285] [2022-02-10 03:48:24,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:48:24,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:48:24,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:48:24,405 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:48:24,406 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:48:24,406 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143988285] [2022-02-10 03:48:24,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143988285] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:48:24,406 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140868617] [2022-02-10 03:48:24,406 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:48:24,406 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:48:24,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:48:24,408 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:48:24,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-10 03:48:24,428 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:48:24,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:48:24,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-10 03:48:24,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:48:24,530 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:48:24,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:48:24,620 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:48:24,620 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140868617] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:48:24,620 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:48:24,620 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-02-10 03:48:24,620 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385142453] [2022-02-10 03:48:24,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:48:24,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-10 03:48:24,621 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:48:24,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-10 03:48:24,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-02-10 03:48:24,621 INFO L87 Difference]: Start difference. First operand 168 states and 321 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:25,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:48:25,188 INFO L93 Difference]: Finished difference Result 507 states and 929 transitions. [2022-02-10 03:48:25,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-10 03:48:25,189 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:48:25,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:48:25,190 INFO L225 Difference]: With dead ends: 507 [2022-02-10 03:48:25,190 INFO L226 Difference]: Without dead ends: 507 [2022-02-10 03:48:25,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=492, Invalid=1488, Unknown=0, NotChecked=0, Total=1980 [2022-02-10 03:48:25,191 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 197 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:48:25,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 173 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:48:25,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-02-10 03:48:25,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 202. [2022-02-10 03:48:25,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 1.9751243781094527) internal successors, (397), 201 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:25,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 397 transitions. [2022-02-10 03:48:25,195 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 397 transitions. Word has length 24 [2022-02-10 03:48:25,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:48:25,195 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 397 transitions. [2022-02-10 03:48:25,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:25,195 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 397 transitions. [2022-02-10 03:48:25,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:48:25,196 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:48:25,196 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] [2022-02-10 03:48:25,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-10 03:48:25,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:48:25,411 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:48:25,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:48:25,412 INFO L85 PathProgramCache]: Analyzing trace with hash -2007404748, now seen corresponding path program 1 times [2022-02-10 03:48:25,412 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:48:25,412 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651081019] [2022-02-10 03:48:25,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:48:25,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:48:25,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:48:25,446 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:48:25,446 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:48:25,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651081019] [2022-02-10 03:48:25,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651081019] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:48:25,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385238223] [2022-02-10 03:48:25,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:48:25,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:48:25,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:48:25,447 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:48:25,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-10 03:48:25,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:48:25,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-10 03:48:25,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:48:25,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:48:25,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:48:25,603 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:48:25,603 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385238223] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:48:25,603 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:48:25,603 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-02-10 03:48:25,603 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235440050] [2022-02-10 03:48:25,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:48:25,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-10 03:48:25,603 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:48:25,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-10 03:48:25,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-02-10 03:48:25,604 INFO L87 Difference]: Start difference. First operand 202 states and 397 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:25,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:48:25,709 INFO L93 Difference]: Finished difference Result 454 states and 874 transitions. [2022-02-10 03:48:25,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:48:25,710 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:48:25,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:48:25,711 INFO L225 Difference]: With dead ends: 454 [2022-02-10 03:48:25,711 INFO L226 Difference]: Without dead ends: 454 [2022-02-10 03:48:25,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2022-02-10 03:48:25,712 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 164 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:48:25,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 31 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:48:25,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-02-10 03:48:25,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 316. [2022-02-10 03:48:25,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.123809523809524) internal successors, (669), 315 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:25,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 669 transitions. [2022-02-10 03:48:25,716 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 669 transitions. Word has length 24 [2022-02-10 03:48:25,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:48:25,716 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 669 transitions. [2022-02-10 03:48:25,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:25,717 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 669 transitions. [2022-02-10 03:48:25,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:48:25,717 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:48:25,717 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] [2022-02-10 03:48:25,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-10 03:48:25,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:48:25,931 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:48:25,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:48:25,932 INFO L85 PathProgramCache]: Analyzing trace with hash 437814964, now seen corresponding path program 5 times [2022-02-10 03:48:25,932 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:48:25,932 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47052246] [2022-02-10 03:48:25,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:48:25,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:48:25,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:48:25,964 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:48:25,964 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:48:25,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47052246] [2022-02-10 03:48:25,964 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47052246] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:48:25,965 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131056105] [2022-02-10 03:48:25,965 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:48:25,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:48:25,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:48:25,966 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:48:25,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-10 03:48:25,988 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 03:48:25,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:48:25,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-10 03:48:25,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:48:26,071 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:48:26,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:48:26,123 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:48:26,123 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131056105] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:48:26,123 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:48:26,124 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-02-10 03:48:26,124 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161731892] [2022-02-10 03:48:26,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:48:26,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-10 03:48:26,124 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:48:26,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-10 03:48:26,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-02-10 03:48:26,125 INFO L87 Difference]: Start difference. First operand 316 states and 669 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 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) [2022-02-10 03:48:26,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:48:26,397 INFO L93 Difference]: Finished difference Result 798 states and 1650 transitions. [2022-02-10 03:48:26,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-10 03:48:26,398 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 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 24 [2022-02-10 03:48:26,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:48:26,399 INFO L225 Difference]: With dead ends: 798 [2022-02-10 03:48:26,399 INFO L226 Difference]: Without dead ends: 791 [2022-02-10 03:48:26,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2022-02-10 03:48:26,400 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 257 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:48:26,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 107 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:48:26,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-02-10 03:48:26,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 541. [2022-02-10 03:48:26,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 540 states have (on average 2.224074074074074) internal successors, (1201), 540 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:26,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 1201 transitions. [2022-02-10 03:48:26,408 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 1201 transitions. Word has length 24 [2022-02-10 03:48:26,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:48:26,408 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 1201 transitions. [2022-02-10 03:48:26,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 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) [2022-02-10 03:48:26,409 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 1201 transitions. [2022-02-10 03:48:26,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:48:26,410 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:48:26,410 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] [2022-02-10 03:48:26,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-10 03:48:26,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:48:26,625 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:48:26,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:48:26,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1364786488, now seen corresponding path program 2 times [2022-02-10 03:48:26,625 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:48:26,625 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798272382] [2022-02-10 03:48:26,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:48:26,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:48:26,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:48:26,655 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:48:26,656 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:48:26,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798272382] [2022-02-10 03:48:26,656 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798272382] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:48:26,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950098795] [2022-02-10 03:48:26,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:48:26,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:48:26,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:48:26,657 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:48:26,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-10 03:48:26,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:48:26,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:48:26,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-10 03:48:26,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:48:26,733 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:48:26,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:48:26,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:48:26,788 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950098795] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:48:26,788 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:48:26,788 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-02-10 03:48:26,788 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567880455] [2022-02-10 03:48:26,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:48:26,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-10 03:48:26,788 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:48:26,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-10 03:48:26,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-02-10 03:48:26,789 INFO L87 Difference]: Start difference. First operand 541 states and 1201 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:26,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:48:26,956 INFO L93 Difference]: Finished difference Result 920 states and 1841 transitions. [2022-02-10 03:48:26,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-10 03:48:26,957 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:48:26,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:48:26,958 INFO L225 Difference]: With dead ends: 920 [2022-02-10 03:48:26,958 INFO L226 Difference]: Without dead ends: 920 [2022-02-10 03:48:26,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2022-02-10 03:48:26,959 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 129 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:48:26,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 64 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:48:26,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2022-02-10 03:48:26,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 579. [2022-02-10 03:48:26,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 578 states have (on average 2.1747404844290656) internal successors, (1257), 578 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:26,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 1257 transitions. [2022-02-10 03:48:26,967 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 1257 transitions. Word has length 24 [2022-02-10 03:48:26,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:48:26,967 INFO L470 AbstractCegarLoop]: Abstraction has 579 states and 1257 transitions. [2022-02-10 03:48:26,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:26,968 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 1257 transitions. [2022-02-10 03:48:26,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:48:26,968 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:48:26,969 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] [2022-02-10 03:48:26,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-10 03:48:27,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:48:27,184 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:48:27,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:48:27,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1520202116, now seen corresponding path program 6 times [2022-02-10 03:48:27,184 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:48:27,184 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290670281] [2022-02-10 03:48:27,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:48:27,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:48:27,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:48:27,220 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:48:27,220 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:48:27,220 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290670281] [2022-02-10 03:48:27,220 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290670281] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:48:27,220 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581697090] [2022-02-10 03:48:27,220 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:48:27,220 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:48:27,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:48:27,221 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:48:27,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-10 03:48:27,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-10 03:48:27,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:48:27,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-10 03:48:27,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:48:27,306 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:48:27,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:48:27,385 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:48:27,386 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581697090] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:48:27,386 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:48:27,386 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-02-10 03:48:27,386 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370735196] [2022-02-10 03:48:27,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:48:27,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-10 03:48:27,386 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:48:27,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-10 03:48:27,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-02-10 03:48:27,387 INFO L87 Difference]: Start difference. First operand 579 states and 1257 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:27,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:48:27,777 INFO L93 Difference]: Finished difference Result 1166 states and 2392 transitions. [2022-02-10 03:48:27,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-10 03:48:27,777 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:48:27,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:48:27,779 INFO L225 Difference]: With dead ends: 1166 [2022-02-10 03:48:27,779 INFO L226 Difference]: Without dead ends: 1166 [2022-02-10 03:48:27,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=364, Invalid=1042, Unknown=0, NotChecked=0, Total=1406 [2022-02-10 03:48:27,780 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 147 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:48:27,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 98 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:48:27,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1166 states. [2022-02-10 03:48:27,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1166 to 584. [2022-02-10 03:48:27,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 583 states have (on average 2.171526586620926) internal successors, (1266), 583 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:27,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 1266 transitions. [2022-02-10 03:48:27,793 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 1266 transitions. Word has length 24 [2022-02-10 03:48:27,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:48:27,794 INFO L470 AbstractCegarLoop]: Abstraction has 584 states and 1266 transitions. [2022-02-10 03:48:27,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:27,794 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 1266 transitions. [2022-02-10 03:48:27,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:48:27,795 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:48:27,795 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] [2022-02-10 03:48:27,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-10 03:48:28,010 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,SelfDestructingSolverStorable10 [2022-02-10 03:48:28,011 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:48:28,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:48:28,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1873818808, now seen corresponding path program 7 times [2022-02-10 03:48:28,011 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:48:28,011 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636239928] [2022-02-10 03:48:28,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:48:28,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:48:28,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:48:28,046 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:48:28,046 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:48:28,047 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636239928] [2022-02-10 03:48:28,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636239928] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:48:28,047 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500572665] [2022-02-10 03:48:28,047 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:48:28,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:48:28,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:48:28,048 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:48:28,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-10 03:48:28,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:48:28,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-10 03:48:28,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:48:28,159 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:48:28,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:48:28,244 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:48:28,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500572665] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:48:28,245 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:48:28,245 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-02-10 03:48:28,245 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852690456] [2022-02-10 03:48:28,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:48:28,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-10 03:48:28,246 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:48:28,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-10 03:48:28,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-02-10 03:48:28,246 INFO L87 Difference]: Start difference. First operand 584 states and 1266 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:28,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:48:28,522 INFO L93 Difference]: Finished difference Result 1141 states and 2328 transitions. [2022-02-10 03:48:28,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-10 03:48:28,522 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:48:28,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:48:28,524 INFO L225 Difference]: With dead ends: 1141 [2022-02-10 03:48:28,524 INFO L226 Difference]: Without dead ends: 1141 [2022-02-10 03:48:28,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=219, Invalid=537, Unknown=0, NotChecked=0, Total=756 [2022-02-10 03:48:28,525 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 188 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:48:28,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 144 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:48:28,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1141 states. [2022-02-10 03:48:28,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1141 to 821. [2022-02-10 03:48:28,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 2.2621951219512195) internal successors, (1855), 820 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:28,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1855 transitions. [2022-02-10 03:48:28,536 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1855 transitions. Word has length 24 [2022-02-10 03:48:28,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:48:28,537 INFO L470 AbstractCegarLoop]: Abstraction has 821 states and 1855 transitions. [2022-02-10 03:48:28,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:28,537 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1855 transitions. [2022-02-10 03:48:28,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:48:28,538 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:48:28,538 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] [2022-02-10 03:48:28,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-10 03:48:28,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:48:28,753 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:48:28,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:48:28,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1749610500, now seen corresponding path program 8 times [2022-02-10 03:48:28,753 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:48:28,753 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963102647] [2022-02-10 03:48:28,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:48:28,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:48:28,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:48:28,793 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:48:28,793 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:48:28,793 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963102647] [2022-02-10 03:48:28,794 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963102647] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:48:28,794 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843385537] [2022-02-10 03:48:28,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:48:28,794 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:48:28,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:48:28,795 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:48:28,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-10 03:48:28,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:48:28,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:48:28,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-10 03:48:28,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:48:28,879 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:48:28,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:48:28,943 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:48:28,944 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843385537] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:48:28,944 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:48:28,944 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-02-10 03:48:28,944 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320982668] [2022-02-10 03:48:28,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:48:28,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-10 03:48:28,944 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:48:28,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-10 03:48:28,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-02-10 03:48:28,945 INFO L87 Difference]: Start difference. First operand 821 states and 1855 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:29,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:48:29,351 INFO L93 Difference]: Finished difference Result 1523 states and 3273 transitions. [2022-02-10 03:48:29,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-10 03:48:29,351 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:48:29,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:48:29,353 INFO L225 Difference]: With dead ends: 1523 [2022-02-10 03:48:29,353 INFO L226 Difference]: Without dead ends: 1522 [2022-02-10 03:48:29,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=363, Invalid=1197, Unknown=0, NotChecked=0, Total=1560 [2022-02-10 03:48:29,354 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 165 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:48:29,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 129 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:48:29,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1522 states. [2022-02-10 03:48:29,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1522 to 854. [2022-02-10 03:48:29,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 2.246189917936694) internal successors, (1916), 853 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:29,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 1916 transitions. [2022-02-10 03:48:29,369 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 1916 transitions. Word has length 24 [2022-02-10 03:48:29,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:48:29,369 INFO L470 AbstractCegarLoop]: Abstraction has 854 states and 1916 transitions. [2022-02-10 03:48:29,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:29,370 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 1916 transitions. [2022-02-10 03:48:29,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:48:29,371 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:48:29,371 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] [2022-02-10 03:48:29,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-10 03:48:29,587 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,SelfDestructingSolverStorable12 [2022-02-10 03:48:29,587 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:48:29,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:48:29,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1212838136, now seen corresponding path program 3 times [2022-02-10 03:48:29,587 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:48:29,587 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986894199] [2022-02-10 03:48:29,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:48:29,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:48:29,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:48:29,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:48:29,627 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:48:29,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986894199] [2022-02-10 03:48:29,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986894199] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:48:29,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496851762] [2022-02-10 03:48:29,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:48:29,627 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:48:29,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:48:29,628 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:48:29,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-10 03:48:29,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-10 03:48:29,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:48:29,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-10 03:48:29,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:48:29,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:48:29,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:48:29,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:48:29,760 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496851762] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:48:29,760 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:48:29,760 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 9 [2022-02-10 03:48:29,761 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987244569] [2022-02-10 03:48:29,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:48:29,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-10 03:48:29,761 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:48:29,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-10 03:48:29,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-02-10 03:48:29,761 INFO L87 Difference]: Start difference. First operand 854 states and 1916 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:29,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:48:29,861 INFO L93 Difference]: Finished difference Result 1018 states and 2194 transitions. [2022-02-10 03:48:29,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:48:29,861 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:48:29,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:48:29,862 INFO L225 Difference]: With dead ends: 1018 [2022-02-10 03:48:29,862 INFO L226 Difference]: Without dead ends: 1018 [2022-02-10 03:48:29,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2022-02-10 03:48:29,863 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 105 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:48:29,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 49 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:48:29,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2022-02-10 03:48:29,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 835. [2022-02-10 03:48:29,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 2.2553956834532376) internal successors, (1881), 834 states have internal predecessors, (1881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:29,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 1881 transitions. [2022-02-10 03:48:29,874 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 1881 transitions. Word has length 24 [2022-02-10 03:48:29,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:48:29,874 INFO L470 AbstractCegarLoop]: Abstraction has 835 states and 1881 transitions. [2022-02-10 03:48:29,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:29,874 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 1881 transitions. [2022-02-10 03:48:29,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:48:29,875 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:48:29,875 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] [2022-02-10 03:48:29,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-10 03:48:30,091 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,SelfDestructingSolverStorable13 [2022-02-10 03:48:30,092 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:48:30,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:48:30,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1763307140, now seen corresponding path program 9 times [2022-02-10 03:48:30,092 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:48:30,092 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944544968] [2022-02-10 03:48:30,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:48:30,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:48:30,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:48:30,128 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:48:30,128 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:48:30,128 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944544968] [2022-02-10 03:48:30,129 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944544968] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:48:30,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818735292] [2022-02-10 03:48:30,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:48:30,129 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:48:30,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:48:30,130 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:48:30,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-10 03:48:30,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:48:30,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:48:30,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-10 03:48:30,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:48:30,200 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:48:30,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:48:30,249 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:48:30,250 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818735292] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:48:30,250 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:48:30,250 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-02-10 03:48:30,250 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627525434] [2022-02-10 03:48:30,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:48:30,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-10 03:48:30,251 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:48:30,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-10 03:48:30,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-02-10 03:48:30,251 INFO L87 Difference]: Start difference. First operand 835 states and 1881 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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) [2022-02-10 03:48:30,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:48:30,504 INFO L93 Difference]: Finished difference Result 1257 states and 2700 transitions. [2022-02-10 03:48:30,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-10 03:48:30,504 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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 24 [2022-02-10 03:48:30,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:48:30,506 INFO L225 Difference]: With dead ends: 1257 [2022-02-10 03:48:30,506 INFO L226 Difference]: Without dead ends: 1257 [2022-02-10 03:48:30,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=213, Invalid=599, Unknown=0, NotChecked=0, Total=812 [2022-02-10 03:48:30,507 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 129 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:48:30,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 111 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:48:30,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1257 states. [2022-02-10 03:48:30,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1257 to 891. [2022-02-10 03:48:30,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 2.251685393258427) internal successors, (2004), 890 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:30,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 2004 transitions. [2022-02-10 03:48:30,520 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 2004 transitions. Word has length 24 [2022-02-10 03:48:30,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:48:30,520 INFO L470 AbstractCegarLoop]: Abstraction has 891 states and 2004 transitions. [2022-02-10 03:48:30,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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) [2022-02-10 03:48:30,521 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 2004 transitions. [2022-02-10 03:48:30,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:48:30,522 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:48:30,522 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] [2022-02-10 03:48:30,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-10 03:48:30,738 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,SelfDestructingSolverStorable14 [2022-02-10 03:48:30,738 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:48:30,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:48:30,739 INFO L85 PathProgramCache]: Analyzing trace with hash 85686396, now seen corresponding path program 10 times [2022-02-10 03:48:30,739 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:48:30,739 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123017412] [2022-02-10 03:48:30,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:48:30,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:48:30,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:48:30,794 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:48:30,794 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:48:30,795 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123017412] [2022-02-10 03:48:30,795 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123017412] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:48:30,795 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302543587] [2022-02-10 03:48:30,795 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:48:30,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:48:30,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:48:30,796 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:48:30,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-10 03:48:30,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:48:30,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:48:30,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-10 03:48:30,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:48:30,895 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:48:30,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:48:30,959 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:48:30,960 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302543587] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:48:30,960 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:48:30,960 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2022-02-10 03:48:30,960 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645204674] [2022-02-10 03:48:30,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:48:30,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-10 03:48:30,960 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:48:30,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-10 03:48:30,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-02-10 03:48:30,961 INFO L87 Difference]: Start difference. First operand 891 states and 2004 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:31,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:48:31,189 INFO L93 Difference]: Finished difference Result 1151 states and 2521 transitions. [2022-02-10 03:48:31,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-10 03:48:31,190 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:48:31,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:48:31,191 INFO L225 Difference]: With dead ends: 1151 [2022-02-10 03:48:31,191 INFO L226 Difference]: Without dead ends: 1149 [2022-02-10 03:48:31,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2022-02-10 03:48:31,192 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 136 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:48:31,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 117 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:48:31,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2022-02-10 03:48:31,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 1019. [2022-02-10 03:48:31,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 1018 states have (on average 2.2858546168958744) internal successors, (2327), 1018 states have internal predecessors, (2327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:31,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 2327 transitions. [2022-02-10 03:48:31,205 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 2327 transitions. Word has length 24 [2022-02-10 03:48:31,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:48:31,206 INFO L470 AbstractCegarLoop]: Abstraction has 1019 states and 2327 transitions. [2022-02-10 03:48:31,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:31,206 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 2327 transitions. [2022-02-10 03:48:31,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:48:31,207 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:48:31,207 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] [2022-02-10 03:48:31,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-10 03:48:31,423 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,SelfDestructingSolverStorable15 [2022-02-10 03:48:31,423 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:48:31,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:48:31,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1903831492, now seen corresponding path program 11 times [2022-02-10 03:48:31,423 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:48:31,424 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157148291] [2022-02-10 03:48:31,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:48:31,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:48:31,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:48:31,452 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:48:31,452 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:48:31,452 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157148291] [2022-02-10 03:48:31,452 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157148291] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:48:31,452 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783830430] [2022-02-10 03:48:31,452 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:48:31,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:48:31,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:48:31,453 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:48:31,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-10 03:48:31,474 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 03:48:31,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:48:31,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-10 03:48:31,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:48:31,523 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:48:31,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:48:31,574 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:48:31,575 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783830430] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:48:31,575 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:48:31,575 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-02-10 03:48:31,575 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395177738] [2022-02-10 03:48:31,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:48:31,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-10 03:48:31,575 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:48:31,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-10 03:48:31,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-02-10 03:48:31,576 INFO L87 Difference]: Start difference. First operand 1019 states and 2327 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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) [2022-02-10 03:48:31,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:48:31,789 INFO L93 Difference]: Finished difference Result 1424 states and 3124 transitions. [2022-02-10 03:48:31,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-10 03:48:31,789 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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 24 [2022-02-10 03:48:31,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:48:31,791 INFO L225 Difference]: With dead ends: 1424 [2022-02-10 03:48:31,792 INFO L226 Difference]: Without dead ends: 1423 [2022-02-10 03:48:31,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2022-02-10 03:48:31,792 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 153 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:48:31,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 72 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:48:31,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2022-02-10 03:48:31,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 1019. [2022-02-10 03:48:31,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 1018 states have (on average 2.2848722986247543) internal successors, (2326), 1018 states have internal predecessors, (2326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:31,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 2326 transitions. [2022-02-10 03:48:31,809 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 2326 transitions. Word has length 24 [2022-02-10 03:48:31,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:48:31,810 INFO L470 AbstractCegarLoop]: Abstraction has 1019 states and 2326 transitions. [2022-02-10 03:48:31,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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) [2022-02-10 03:48:31,810 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 2326 transitions. [2022-02-10 03:48:31,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:48:31,811 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:48:31,811 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] [2022-02-10 03:48:31,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-10 03:48:32,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:48:32,015 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:48:32,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:48:32,016 INFO L85 PathProgramCache]: Analyzing trace with hash -369242560, now seen corresponding path program 12 times [2022-02-10 03:48:32,016 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:48:32,016 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089270297] [2022-02-10 03:48:32,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:48:32,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:48:32,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:48:32,056 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:48:32,056 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:48:32,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089270297] [2022-02-10 03:48:32,057 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089270297] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:48:32,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573179709] [2022-02-10 03:48:32,057 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:48:32,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:48:32,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:48:32,058 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:48:32,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-10 03:48:32,078 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 03:48:32,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:48:32,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-10 03:48:32,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:48:32,131 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:48:32,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:48:32,182 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:48:32,183 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573179709] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:48:32,183 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:48:32,183 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-02-10 03:48:32,183 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737848697] [2022-02-10 03:48:32,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:48:32,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-10 03:48:32,183 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:48:32,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-10 03:48:32,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-02-10 03:48:32,184 INFO L87 Difference]: Start difference. First operand 1019 states and 2326 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:32,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:48:32,451 INFO L93 Difference]: Finished difference Result 1430 states and 3155 transitions. [2022-02-10 03:48:32,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-10 03:48:32,451 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:48:32,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:48:32,453 INFO L225 Difference]: With dead ends: 1430 [2022-02-10 03:48:32,453 INFO L226 Difference]: Without dead ends: 1430 [2022-02-10 03:48:32,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=211, Invalid=545, Unknown=0, NotChecked=0, Total=756 [2022-02-10 03:48:32,454 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 91 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:48:32,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 129 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:48:32,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1430 states. [2022-02-10 03:48:32,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1430 to 1042. [2022-02-10 03:48:32,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1042 states, 1041 states have (on average 2.2804995196926034) internal successors, (2374), 1041 states have internal predecessors, (2374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:32,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1042 states to 1042 states and 2374 transitions. [2022-02-10 03:48:32,470 INFO L78 Accepts]: Start accepts. Automaton has 1042 states and 2374 transitions. Word has length 24 [2022-02-10 03:48:32,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:48:32,470 INFO L470 AbstractCegarLoop]: Abstraction has 1042 states and 2374 transitions. [2022-02-10 03:48:32,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:32,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1042 states and 2374 transitions. [2022-02-10 03:48:32,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:48:32,471 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:48:32,471 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] [2022-02-10 03:48:32,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-10 03:48:32,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-02-10 03:48:32,687 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:48:32,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:48:32,688 INFO L85 PathProgramCache]: Analyzing trace with hash -715193216, now seen corresponding path program 13 times [2022-02-10 03:48:32,688 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:48:32,688 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386273544] [2022-02-10 03:48:32,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:48:32,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:48:32,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:48:32,735 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:48:32,735 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:48:32,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386273544] [2022-02-10 03:48:32,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386273544] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:48:32,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143297474] [2022-02-10 03:48:32,735 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:48:32,735 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:48:32,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:48:32,736 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:48:32,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-10 03:48:32,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:48:32,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-10 03:48:32,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:48:32,810 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:48:32,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:48:32,859 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:48:32,859 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143297474] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:48:32,859 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:48:32,859 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2022-02-10 03:48:32,860 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965791158] [2022-02-10 03:48:32,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:48:32,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-10 03:48:32,860 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:48:32,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-10 03:48:32,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-02-10 03:48:32,860 INFO L87 Difference]: Start difference. First operand 1042 states and 2374 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:33,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:48:33,095 INFO L93 Difference]: Finished difference Result 1445 states and 3168 transitions. [2022-02-10 03:48:33,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-10 03:48:33,099 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-10 03:48:33,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:48:33,101 INFO L225 Difference]: With dead ends: 1445 [2022-02-10 03:48:33,101 INFO L226 Difference]: Without dead ends: 1442 [2022-02-10 03:48:33,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=163, Invalid=487, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:48:33,101 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 145 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:48:33,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 110 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:48:33,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1442 states. [2022-02-10 03:48:33,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1442 to 1045. [2022-02-10 03:48:33,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 1044 states have (on average 2.2768199233716473) internal successors, (2377), 1044 states have internal predecessors, (2377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:33,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 2377 transitions. [2022-02-10 03:48:33,117 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 2377 transitions. Word has length 24 [2022-02-10 03:48:33,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:48:33,117 INFO L470 AbstractCegarLoop]: Abstraction has 1045 states and 2377 transitions. [2022-02-10 03:48:33,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:33,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 2377 transitions. [2022-02-10 03:48:33,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:48:33,118 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:48:33,118 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] [2022-02-10 03:48:33,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-10 03:48:33,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:48:33,334 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:48:33,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:48:33,334 INFO L85 PathProgramCache]: Analyzing trace with hash 2057447698, now seen corresponding path program 4 times [2022-02-10 03:48:33,334 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:48:33,334 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137077462] [2022-02-10 03:48:33,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:48:33,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:48:33,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:48:33,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:48:33,878 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:48:33,878 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137077462] [2022-02-10 03:48:33,878 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137077462] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:48:33,878 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078674296] [2022-02-10 03:48:33,878 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:48:33,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:48:33,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:48:33,879 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:48:33,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-10 03:48:33,901 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:48:33,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:48:33,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-10 03:48:33,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:48:34,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:48:34,550 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:48:34,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-02-10 03:48:34,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:48:34,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:48:35,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:48:35,957 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:48:35,958 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 343 treesize of output 269 [2022-02-10 03:48:39,429 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:48:39,429 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078674296] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:48:39,429 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:48:39,429 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-10 03:48:39,430 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672776818] [2022-02-10 03:48:39,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:48:39,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-10 03:48:39,430 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:48:39,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-10 03:48:39,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:48:39,430 INFO L87 Difference]: Start difference. First operand 1045 states and 2377 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:45,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:48:45,320 INFO L93 Difference]: Finished difference Result 1783 states and 3732 transitions. [2022-02-10 03:48:45,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-10 03:48:45,320 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:48:45,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:48:45,323 INFO L225 Difference]: With dead ends: 1783 [2022-02-10 03:48:45,323 INFO L226 Difference]: Without dead ends: 1773 [2022-02-10 03:48:45,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1417 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=861, Invalid=3561, Unknown=0, NotChecked=0, Total=4422 [2022-02-10 03:48:45,324 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 317 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 872 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-10 03:48:45,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 177 Invalid, 975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 872 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-10 03:48:45,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1773 states. [2022-02-10 03:48:45,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1773 to 1085. [2022-02-10 03:48:45,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1085 states, 1084 states have (on average 2.2924354243542435) internal successors, (2485), 1084 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:45,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1085 states to 1085 states and 2485 transitions. [2022-02-10 03:48:45,339 INFO L78 Accepts]: Start accepts. Automaton has 1085 states and 2485 transitions. Word has length 26 [2022-02-10 03:48:45,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:48:45,339 INFO L470 AbstractCegarLoop]: Abstraction has 1085 states and 2485 transitions. [2022-02-10 03:48:45,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:48:45,340 INFO L276 IsEmpty]: Start isEmpty. Operand 1085 states and 2485 transitions. [2022-02-10 03:48:45,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:48:45,341 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:48:45,341 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] [2022-02-10 03:48:45,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-02-10 03:48:45,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:48:45,552 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:48:45,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:48:45,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1983730474, now seen corresponding path program 5 times [2022-02-10 03:48:45,552 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:48:45,552 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973726373] [2022-02-10 03:48:45,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:48:45,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:48:45,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:48:46,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:48:46,187 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:48:46,187 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973726373] [2022-02-10 03:48:46,187 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973726373] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:48:46,187 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255661884] [2022-02-10 03:48:46,187 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:48:46,187 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:48:46,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:48:46,188 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:48:46,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-10 03:48:46,210 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 03:48:46,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:48:46,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-10 03:48:46,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:48:46,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:48:46,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:48:46,787 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-02-10 03:48:47,134 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:48:47,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:48:48,318 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:48:48,337 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:48:48,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 335 treesize of output 261 [2022-02-10 03:48:50,999 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:48:50,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255661884] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:48:50,999 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:48:50,999 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-02-10 03:48:50,999 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706909367] [2022-02-10 03:48:50,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:48:51,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-10 03:48:51,000 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:48:51,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-10 03:48:51,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2022-02-10 03:48:51,000 INFO L87 Difference]: Start difference. First operand 1085 states and 2485 transitions. Second operand has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:49:03,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:49:03,646 INFO L93 Difference]: Finished difference Result 1979 states and 4116 transitions. [2022-02-10 03:49:03,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-10 03:49:03,647 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:49:03,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:49:03,649 INFO L225 Difference]: With dead ends: 1979 [2022-02-10 03:49:03,650 INFO L226 Difference]: Without dead ends: 1969 [2022-02-10 03:49:03,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2779 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=1209, Invalid=7163, Unknown=0, NotChecked=0, Total=8372 [2022-02-10 03:49:03,652 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 399 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 1250 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 1436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-10 03:49:03,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 315 Invalid, 1436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1250 Invalid, 0 Unknown, 72 Unchecked, 1.0s Time] [2022-02-10 03:49:03,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1969 states. [2022-02-10 03:49:03,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1969 to 1098. [2022-02-10 03:49:03,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1098 states, 1097 states have (on average 2.2907930720145853) internal successors, (2513), 1097 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:49:03,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1098 states to 1098 states and 2513 transitions. [2022-02-10 03:49:03,669 INFO L78 Accepts]: Start accepts. Automaton has 1098 states and 2513 transitions. Word has length 26 [2022-02-10 03:49:03,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:49:03,669 INFO L470 AbstractCegarLoop]: Abstraction has 1098 states and 2513 transitions. [2022-02-10 03:49:03,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:49:03,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1098 states and 2513 transitions. [2022-02-10 03:49:03,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:49:03,671 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:49:03,671 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] [2022-02-10 03:49:03,694 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-02-10 03:49:03,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:49:03,887 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:49:03,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:49:03,887 INFO L85 PathProgramCache]: Analyzing trace with hash 207700114, now seen corresponding path program 14 times [2022-02-10 03:49:03,887 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:49:03,887 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357702340] [2022-02-10 03:49:03,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:49:03,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:49:03,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:49:04,400 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:49:04,401 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:49:04,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357702340] [2022-02-10 03:49:04,401 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357702340] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:49:04,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675375187] [2022-02-10 03:49:04,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:49:04,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:49:04,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:49:04,402 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:49:04,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-10 03:49:04,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:49:04,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:49:04,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-10 03:49:04,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:49:04,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:49:04,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:49:04,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:49:04,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 75 [2022-02-10 03:49:05,120 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:49:05,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:49:06,190 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-10 03:49:06,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 371 treesize of output 253 [2022-02-10 03:49:07,796 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:49:07,796 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675375187] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:49:07,796 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:49:07,796 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-02-10 03:49:07,797 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063325005] [2022-02-10 03:49:07,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:49:07,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-10 03:49:07,797 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:49:07,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-10 03:49:07,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-02-10 03:49:07,798 INFO L87 Difference]: Start difference. First operand 1098 states and 2513 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:49:13,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:49:13,221 INFO L93 Difference]: Finished difference Result 1726 states and 3814 transitions. [2022-02-10 03:49:13,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-10 03:49:13,221 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:49:13,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:49:13,224 INFO L225 Difference]: With dead ends: 1726 [2022-02-10 03:49:13,224 INFO L226 Difference]: Without dead ends: 1714 [2022-02-10 03:49:13,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1615 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=746, Invalid=4366, Unknown=0, NotChecked=0, Total=5112 [2022-02-10 03:49:13,226 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 232 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 1103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-10 03:49:13,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 213 Invalid, 1103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1022 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-10 03:49:13,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2022-02-10 03:49:13,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1114. [2022-02-10 03:49:13,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 1113 states have (on average 2.2812219227313566) internal successors, (2539), 1113 states have internal predecessors, (2539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:49:13,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 2539 transitions. [2022-02-10 03:49:13,246 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 2539 transitions. Word has length 26 [2022-02-10 03:49:13,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:49:13,247 INFO L470 AbstractCegarLoop]: Abstraction has 1114 states and 2539 transitions. [2022-02-10 03:49:13,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:49:13,247 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 2539 transitions. [2022-02-10 03:49:13,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:49:13,248 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:49:13,248 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] [2022-02-10 03:49:13,264 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-02-10 03:49:13,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:49:13,463 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:49:13,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:49:13,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1134671638, now seen corresponding path program 6 times [2022-02-10 03:49:13,464 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:49:13,464 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992803073] [2022-02-10 03:49:13,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:49:13,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:49:13,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:49:14,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:49:14,042 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:49:14,042 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992803073] [2022-02-10 03:49:14,042 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992803073] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:49:14,042 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64657027] [2022-02-10 03:49:14,043 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:49:14,043 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:49:14,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:49:14,044 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:49:14,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-10 03:49:14,066 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 03:49:14,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:49:14,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-10 03:49:14,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:49:14,931 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:49:14,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 109 treesize of output 91 [2022-02-10 03:49:16,774 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:49:16,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:49:17,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:49:17,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:49:17,954 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:49:17,954 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 335 treesize of output 253 [2022-02-10 03:49:20,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:49:20,326 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64657027] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:49:20,326 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:49:20,326 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 29 [2022-02-10 03:49:20,326 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003310410] [2022-02-10 03:49:20,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:49:20,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-10 03:49:20,327 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:49:20,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-10 03:49:20,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2022-02-10 03:49:20,327 INFO L87 Difference]: Start difference. First operand 1114 states and 2539 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:49:38,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:49:38,817 INFO L93 Difference]: Finished difference Result 1928 states and 4045 transitions. [2022-02-10 03:49:38,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-02-10 03:49:38,817 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:49:38,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:49:38,820 INFO L225 Difference]: With dead ends: 1928 [2022-02-10 03:49:38,820 INFO L226 Difference]: Without dead ends: 1907 [2022-02-10 03:49:38,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4000 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=1846, Invalid=10364, Unknown=0, NotChecked=0, Total=12210 [2022-02-10 03:49:38,824 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 412 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 1827 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 1916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:49:38,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 294 Invalid, 1916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1827 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-10 03:49:38,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1907 states. [2022-02-10 03:49:38,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1907 to 1131. [2022-02-10 03:49:38,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 1130 states have (on average 2.275221238938053) internal successors, (2571), 1130 states have internal predecessors, (2571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:49:38,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 2571 transitions. [2022-02-10 03:49:38,842 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 2571 transitions. Word has length 26 [2022-02-10 03:49:38,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:49:38,842 INFO L470 AbstractCegarLoop]: Abstraction has 1131 states and 2571 transitions. [2022-02-10 03:49:38,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:49:38,842 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 2571 transitions. [2022-02-10 03:49:38,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:49:38,844 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:49:38,844 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] [2022-02-10 03:49:38,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-02-10 03:49:39,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-02-10 03:49:39,044 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:49:39,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:49:39,045 INFO L85 PathProgramCache]: Analyzing trace with hash 245927254, now seen corresponding path program 7 times [2022-02-10 03:49:39,045 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:49:39,045 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979056685] [2022-02-10 03:49:39,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:49:39,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:49:39,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:49:39,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:49:39,861 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:49:39,861 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979056685] [2022-02-10 03:49:39,861 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979056685] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:49:39,861 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206561774] [2022-02-10 03:49:39,861 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:49:39,861 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:49:39,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:49:39,862 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:49:39,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-10 03:49:39,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:49:39,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-10 03:49:39,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:49:40,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:49:40,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:49:40,434 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:49:40,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 83 [2022-02-10 03:49:41,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:49:41,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:49:42,244 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-10 03:49:42,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 335 treesize of output 261 [2022-02-10 03:49:46,633 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:49:46,633 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206561774] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:49:46,633 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:49:46,633 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-02-10 03:49:46,633 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867692558] [2022-02-10 03:49:46,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:49:46,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-10 03:49:46,633 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:49:46,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-10 03:49:46,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:49:46,634 INFO L87 Difference]: Start difference. First operand 1131 states and 2571 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:49:57,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:49:57,862 INFO L93 Difference]: Finished difference Result 1824 states and 3811 transitions. [2022-02-10 03:49:57,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-10 03:49:57,870 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:49:57,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:49:57,872 INFO L225 Difference]: With dead ends: 1824 [2022-02-10 03:49:57,872 INFO L226 Difference]: Without dead ends: 1802 [2022-02-10 03:49:57,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2621 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=1106, Invalid=7084, Unknown=0, NotChecked=0, Total=8190 [2022-02-10 03:49:57,875 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 341 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 1653 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 1714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-10 03:49:57,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 313 Invalid, 1714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1653 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-10 03:49:57,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2022-02-10 03:49:57,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 1144. [2022-02-10 03:49:57,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1144 states, 1143 states have (on average 2.2712160979877516) internal successors, (2596), 1143 states have internal predecessors, (2596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:49:57,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1144 states to 1144 states and 2596 transitions. [2022-02-10 03:49:57,891 INFO L78 Accepts]: Start accepts. Automaton has 1144 states and 2596 transitions. Word has length 26 [2022-02-10 03:49:57,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:49:57,892 INFO L470 AbstractCegarLoop]: Abstraction has 1144 states and 2596 transitions. [2022-02-10 03:49:57,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:49:57,892 INFO L276 IsEmpty]: Start isEmpty. Operand 1144 states and 2596 transitions. [2022-02-10 03:49:57,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:49:57,893 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:49:57,893 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] [2022-02-10 03:49:57,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-02-10 03:49:58,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-02-10 03:49:58,095 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:49:58,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:49:58,096 INFO L85 PathProgramCache]: Analyzing trace with hash 982723286, now seen corresponding path program 8 times [2022-02-10 03:49:58,096 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:49:58,096 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399870680] [2022-02-10 03:49:58,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:49:58,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:49:58,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:49:58,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:49:58,503 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:49:58,503 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399870680] [2022-02-10 03:49:58,503 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399870680] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:49:58,503 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408433324] [2022-02-10 03:49:58,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:49:58,503 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:49:58,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:49:58,504 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:49:58,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-10 03:49:58,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:49:58,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:49:58,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-10 03:49:58,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:49:59,195 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:49:59,195 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 109 treesize of output 91 [2022-02-10 03:50:00,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:50:00,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:50:02,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:50:02,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:50:02,498 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:50:02,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 339 treesize of output 253 [2022-02-10 03:50:08,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:50:08,652 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408433324] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:50:08,652 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:50:08,652 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-02-10 03:50:08,653 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850249417] [2022-02-10 03:50:08,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:50:08,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-10 03:50:08,653 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:50:08,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-10 03:50:08,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2022-02-10 03:50:08,653 INFO L87 Difference]: Start difference. First operand 1144 states and 2596 transitions. Second operand has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:50:25,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:50:25,766 INFO L93 Difference]: Finished difference Result 1915 states and 4059 transitions. [2022-02-10 03:50:25,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-02-10 03:50:25,766 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:50:25,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:50:25,769 INFO L225 Difference]: With dead ends: 1915 [2022-02-10 03:50:25,769 INFO L226 Difference]: Without dead ends: 1886 [2022-02-10 03:50:25,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4743 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=2122, Invalid=10988, Unknown=0, NotChecked=0, Total=13110 [2022-02-10 03:50:25,772 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 443 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 1474 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 1589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:50:25,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 287 Invalid, 1589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1474 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-10 03:50:25,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1886 states. [2022-02-10 03:50:25,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1886 to 1176. [2022-02-10 03:50:25,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1175 states have (on average 2.275744680851064) internal successors, (2674), 1175 states have internal predecessors, (2674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:50:25,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 2674 transitions. [2022-02-10 03:50:25,789 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 2674 transitions. Word has length 26 [2022-02-10 03:50:25,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:50:25,789 INFO L470 AbstractCegarLoop]: Abstraction has 1176 states and 2674 transitions. [2022-02-10 03:50:25,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:50:25,789 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 2674 transitions. [2022-02-10 03:50:25,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:50:25,791 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:50:25,791 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] [2022-02-10 03:50:25,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-02-10 03:50:25,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:50:25,992 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:50:25,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:50:25,992 INFO L85 PathProgramCache]: Analyzing trace with hash -608702818, now seen corresponding path program 9 times [2022-02-10 03:50:25,992 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:50:25,992 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920737578] [2022-02-10 03:50:25,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:50:25,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:50:25,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:50:26,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:50:26,386 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:50:26,386 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920737578] [2022-02-10 03:50:26,386 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920737578] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:50:26,386 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625718692] [2022-02-10 03:50:26,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:50:26,386 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:50:26,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:50:26,387 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:50:26,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-10 03:50:26,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:50:26,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:50:26,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-10 03:50:26,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:50:26,859 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:50:26,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 89 treesize of output 81 [2022-02-10 03:50:28,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:50:28,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:50:29,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:50:29,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:50:29,849 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:50:29,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 347 treesize of output 253 [2022-02-10 03:50:33,855 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:50:33,855 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625718692] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:50:33,855 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:50:33,855 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 29 [2022-02-10 03:50:33,855 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246737177] [2022-02-10 03:50:33,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:50:33,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-10 03:50:33,856 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:50:33,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-10 03:50:33,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2022-02-10 03:50:33,856 INFO L87 Difference]: Start difference. First operand 1176 states and 2674 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:50:41,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:50:41,985 INFO L93 Difference]: Finished difference Result 1733 states and 3724 transitions. [2022-02-10 03:50:41,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-10 03:50:41,985 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:50:41,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:50:41,988 INFO L225 Difference]: With dead ends: 1733 [2022-02-10 03:50:41,988 INFO L226 Difference]: Without dead ends: 1717 [2022-02-10 03:50:41,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1639 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=973, Invalid=4577, Unknown=0, NotChecked=0, Total=5550 [2022-02-10 03:50:41,989 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 467 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 1130 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 1570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 342 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-10 03:50:41,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [467 Valid, 215 Invalid, 1570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1130 Invalid, 0 Unknown, 342 Unchecked, 0.8s Time] [2022-02-10 03:50:41,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1717 states. [2022-02-10 03:50:42,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1717 to 1203. [2022-02-10 03:50:42,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1203 states, 1202 states have (on average 2.265391014975042) internal successors, (2723), 1202 states have internal predecessors, (2723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:50:42,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 2723 transitions. [2022-02-10 03:50:42,007 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 2723 transitions. Word has length 26 [2022-02-10 03:50:42,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:50:42,007 INFO L470 AbstractCegarLoop]: Abstraction has 1203 states and 2723 transitions. [2022-02-10 03:50:42,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:50:42,007 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 2723 transitions. [2022-02-10 03:50:42,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:50:42,009 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:50:42,009 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] [2022-02-10 03:50:42,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-02-10 03:50:42,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:50:42,209 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:50:42,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:50:42,210 INFO L85 PathProgramCache]: Analyzing trace with hash -908829230, now seen corresponding path program 10 times [2022-02-10 03:50:42,210 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:50:42,210 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921757572] [2022-02-10 03:50:42,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:50:42,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:50:42,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:50:42,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:50:42,826 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:50:42,827 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921757572] [2022-02-10 03:50:42,827 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921757572] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:50:42,827 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497976358] [2022-02-10 03:50:42,827 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:50:42,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:50:42,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:50:42,828 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:50:42,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-10 03:50:42,856 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:50:42,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:50:42,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-10 03:50:42,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:50:43,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:50:43,283 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:50:43,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-02-10 03:50:43,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:50:43,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:50:45,607 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-10 03:50:45,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 459 treesize of output 333 [2022-02-10 03:50:55,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:50:55,887 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497976358] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:50:55,887 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:50:55,887 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-02-10 03:50:55,888 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222876554] [2022-02-10 03:50:55,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:50:55,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-10 03:50:55,888 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:50:55,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-10 03:50:55,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:50:55,888 INFO L87 Difference]: Start difference. First operand 1203 states and 2723 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:51:03,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:51:03,074 INFO L93 Difference]: Finished difference Result 1839 states and 3891 transitions. [2022-02-10 03:51:03,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-10 03:51:03,074 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:51:03,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:51:03,077 INFO L225 Difference]: With dead ends: 1839 [2022-02-10 03:51:03,077 INFO L226 Difference]: Without dead ends: 1820 [2022-02-10 03:51:03,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1558 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=766, Invalid=4346, Unknown=0, NotChecked=0, Total=5112 [2022-02-10 03:51:03,078 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 305 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 1154 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 1221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-10 03:51:03,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 211 Invalid, 1221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1154 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-10 03:51:03,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1820 states. [2022-02-10 03:51:03,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1820 to 1234. [2022-02-10 03:51:03,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1234 states, 1233 states have (on average 2.253852392538524) internal successors, (2779), 1233 states have internal predecessors, (2779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:51:03,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 2779 transitions. [2022-02-10 03:51:03,094 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 2779 transitions. Word has length 26 [2022-02-10 03:51:03,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:51:03,094 INFO L470 AbstractCegarLoop]: Abstraction has 1234 states and 2779 transitions. [2022-02-10 03:51:03,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:51:03,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 2779 transitions. [2022-02-10 03:51:03,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:51:03,096 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:51:03,096 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] [2022-02-10 03:51:03,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-02-10 03:51:03,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-02-10 03:51:03,296 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:51:03,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:51:03,297 INFO L85 PathProgramCache]: Analyzing trace with hash -2064882602, now seen corresponding path program 11 times [2022-02-10 03:51:03,297 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:51:03,297 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233455679] [2022-02-10 03:51:03,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:51:03,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:51:03,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:51:03,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:51:03,693 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:51:03,693 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233455679] [2022-02-10 03:51:03,693 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233455679] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:51:03,693 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863876580] [2022-02-10 03:51:03,693 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:51:03,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:51:03,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:51:03,694 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:51:03,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-10 03:51:03,720 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 03:51:03,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:51:03,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-10 03:51:03,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:51:04,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:51:04,208 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:51:04,208 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 73 [2022-02-10 03:51:05,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:51:05,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:51:07,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:51:07,691 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:51:07,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 355 treesize of output 269 [2022-02-10 03:51:24,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:51:24,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863876580] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:51:24,746 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:51:24,746 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-10 03:51:24,746 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426979475] [2022-02-10 03:51:24,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:51:24,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:51:24,746 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:51:24,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:51:24,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:51:24,747 INFO L87 Difference]: Start difference. First operand 1234 states and 2779 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:51:29,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:51:29,037 INFO L93 Difference]: Finished difference Result 1772 states and 3686 transitions. [2022-02-10 03:51:29,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-10 03:51:29,038 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:51:29,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:51:29,040 INFO L225 Difference]: With dead ends: 1772 [2022-02-10 03:51:29,040 INFO L226 Difference]: Without dead ends: 1756 [2022-02-10 03:51:29,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1211 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=619, Invalid=3041, Unknown=0, NotChecked=0, Total=3660 [2022-02-10 03:51:29,041 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 282 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-10 03:51:29,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 168 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 607 Invalid, 0 Unknown, 171 Unchecked, 0.5s Time] [2022-02-10 03:51:29,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1756 states. [2022-02-10 03:51:29,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1756 to 1266. [2022-02-10 03:51:29,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 1265 states have (on average 2.2529644268774702) internal successors, (2850), 1265 states have internal predecessors, (2850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:51:29,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 2850 transitions. [2022-02-10 03:51:29,059 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 2850 transitions. Word has length 26 [2022-02-10 03:51:29,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:51:29,059 INFO L470 AbstractCegarLoop]: Abstraction has 1266 states and 2850 transitions. [2022-02-10 03:51:29,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:51:29,059 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 2850 transitions. [2022-02-10 03:51:29,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:51:29,061 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:51:29,061 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] [2022-02-10 03:51:29,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-02-10 03:51:29,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-02-10 03:51:29,277 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:51:29,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:51:29,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1309294362, now seen corresponding path program 12 times [2022-02-10 03:51:29,278 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:51:29,278 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064495557] [2022-02-10 03:51:29,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:51:29,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:51:29,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:51:29,720 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:51:29,720 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:51:29,720 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064495557] [2022-02-10 03:51:29,721 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064495557] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:51:29,721 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954045747] [2022-02-10 03:51:29,721 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:51:29,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:51:29,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:51:29,722 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:51:29,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-10 03:51:29,748 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 03:51:29,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:51:29,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-10 03:51:29,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:51:30,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:51:30,234 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:51:30,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 73 [2022-02-10 03:51:31,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:51:31,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:51:33,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:51:33,740 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:51:33,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 355 treesize of output 269 [2022-02-10 03:51:57,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:51:57,344 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954045747] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:51:57,344 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:51:57,344 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 27 [2022-02-10 03:51:57,344 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499060148] [2022-02-10 03:51:57,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:51:57,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-10 03:51:57,345 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:51:57,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-10 03:51:57,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2022-02-10 03:51:57,345 INFO L87 Difference]: Start difference. First operand 1266 states and 2850 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:52:05,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:52:05,196 INFO L93 Difference]: Finished difference Result 2096 states and 4380 transitions. [2022-02-10 03:52:05,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-10 03:52:05,196 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:52:05,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:52:05,199 INFO L225 Difference]: With dead ends: 2096 [2022-02-10 03:52:05,199 INFO L226 Difference]: Without dead ends: 2084 [2022-02-10 03:52:05,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1885 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=1016, Invalid=5146, Unknown=0, NotChecked=0, Total=6162 [2022-02-10 03:52:05,200 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 418 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 1296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 298 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-10 03:52:05,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 260 Invalid, 1296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 892 Invalid, 0 Unknown, 298 Unchecked, 0.6s Time] [2022-02-10 03:52:05,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2084 states. [2022-02-10 03:52:05,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2084 to 1265. [2022-02-10 03:52:05,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1265 states, 1264 states have (on average 2.252373417721519) internal successors, (2847), 1264 states have internal predecessors, (2847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:52:05,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 2847 transitions. [2022-02-10 03:52:05,216 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 2847 transitions. Word has length 26 [2022-02-10 03:52:05,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:52:05,217 INFO L470 AbstractCegarLoop]: Abstraction has 1265 states and 2847 transitions. [2022-02-10 03:52:05,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:52:05,217 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 2847 transitions. [2022-02-10 03:52:05,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:52:05,218 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:52:05,218 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] [2022-02-10 03:52:05,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-02-10 03:52:05,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-02-10 03:52:05,419 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:52:05,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:52:05,419 INFO L85 PathProgramCache]: Analyzing trace with hash -144428454, now seen corresponding path program 15 times [2022-02-10 03:52:05,419 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:52:05,419 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901754437] [2022-02-10 03:52:05,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:52:05,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:52:05,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:52:05,784 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:52:05,784 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:52:05,784 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901754437] [2022-02-10 03:52:05,784 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901754437] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:52:05,784 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329927350] [2022-02-10 03:52:05,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:52:05,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:52:05,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:52:05,785 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:52:05,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-02-10 03:52:05,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:52:05,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:52:05,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-10 03:52:05,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:52:06,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:52:06,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:52:06,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:52:06,336 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:52:06,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 133 treesize of output 107 [2022-02-10 03:52:07,242 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:52:07,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:52:15,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:52:15,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:52:15,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:52:15,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:52:15,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 277 treesize of output 165 [2022-02-10 03:52:16,194 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:52:16,194 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329927350] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:52:16,194 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:52:16,194 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 29 [2022-02-10 03:52:16,194 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344389957] [2022-02-10 03:52:16,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:52:16,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-10 03:52:16,194 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:52:16,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-10 03:52:16,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2022-02-10 03:52:16,195 INFO L87 Difference]: Start difference. First operand 1265 states and 2847 transitions. Second operand has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:52:23,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:52:23,161 INFO L93 Difference]: Finished difference Result 1683 states and 3626 transitions. [2022-02-10 03:52:23,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-10 03:52:23,162 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:52:23,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:52:23,164 INFO L225 Difference]: With dead ends: 1683 [2022-02-10 03:52:23,164 INFO L226 Difference]: Without dead ends: 1654 [2022-02-10 03:52:23,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1521 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=867, Invalid=4683, Unknown=0, NotChecked=0, Total=5550 [2022-02-10 03:52:23,166 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 287 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 900 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 1271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 308 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-10 03:52:23,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 197 Invalid, 1271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 900 Invalid, 0 Unknown, 308 Unchecked, 0.5s Time] [2022-02-10 03:52:23,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1654 states. [2022-02-10 03:52:23,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1654 to 1296. [2022-02-10 03:52:23,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1296 states, 1295 states have (on average 2.2463320463320464) internal successors, (2909), 1295 states have internal predecessors, (2909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:52:23,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1296 states to 1296 states and 2909 transitions. [2022-02-10 03:52:23,183 INFO L78 Accepts]: Start accepts. Automaton has 1296 states and 2909 transitions. Word has length 26 [2022-02-10 03:52:23,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:52:23,183 INFO L470 AbstractCegarLoop]: Abstraction has 1296 states and 2909 transitions. [2022-02-10 03:52:23,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:52:23,184 INFO L276 IsEmpty]: Start isEmpty. Operand 1296 states and 2909 transitions. [2022-02-10 03:52:23,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:52:23,185 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:52:23,185 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] [2022-02-10 03:52:23,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-02-10 03:52:23,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:52:23,386 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:52:23,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:52:23,386 INFO L85 PathProgramCache]: Analyzing trace with hash -2008570082, now seen corresponding path program 16 times [2022-02-10 03:52:23,386 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:52:23,386 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958607777] [2022-02-10 03:52:23,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:52:23,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:52:23,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:52:24,128 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:52:24,128 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:52:24,128 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958607777] [2022-02-10 03:52:24,128 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958607777] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:52:24,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897068643] [2022-02-10 03:52:24,129 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:52:24,129 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:52:24,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:52:24,130 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:52:24,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-02-10 03:52:24,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:52:24,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:52:24,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-10 03:52:24,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:52:24,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:52:24,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:52:24,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:52:24,927 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:52:24,927 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 75 [2022-02-10 03:52:25,130 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:52:25,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:52:28,275 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-10 03:52:28,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 363 treesize of output 245 [2022-02-10 03:52:30,070 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:52:30,070 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897068643] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:52:30,070 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:52:30,070 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-02-10 03:52:30,070 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108354187] [2022-02-10 03:52:30,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:52:30,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:52:30,071 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:52:30,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:52:30,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:52:30,071 INFO L87 Difference]: Start difference. First operand 1296 states and 2909 transitions. Second operand has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:52:35,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:52:35,880 INFO L93 Difference]: Finished difference Result 1890 states and 4135 transitions. [2022-02-10 03:52:35,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-10 03:52:35,881 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:52:35,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:52:35,884 INFO L225 Difference]: With dead ends: 1890 [2022-02-10 03:52:35,884 INFO L226 Difference]: Without dead ends: 1876 [2022-02-10 03:52:35,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1933 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=864, Invalid=5456, Unknown=0, NotChecked=0, Total=6320 [2022-02-10 03:52:35,885 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 236 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 1223 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 1333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-10 03:52:35,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 327 Invalid, 1333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1223 Invalid, 0 Unknown, 36 Unchecked, 0.8s Time] [2022-02-10 03:52:35,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1876 states. [2022-02-10 03:52:35,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1876 to 1327. [2022-02-10 03:52:35,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1327 states, 1326 states have (on average 2.2390648567119156) internal successors, (2969), 1326 states have internal predecessors, (2969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:52:35,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1327 states to 1327 states and 2969 transitions. [2022-02-10 03:52:35,903 INFO L78 Accepts]: Start accepts. Automaton has 1327 states and 2969 transitions. Word has length 26 [2022-02-10 03:52:35,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:52:35,904 INFO L470 AbstractCegarLoop]: Abstraction has 1327 states and 2969 transitions. [2022-02-10 03:52:35,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:52:35,904 INFO L276 IsEmpty]: Start isEmpty. Operand 1327 states and 2969 transitions. [2022-02-10 03:52:35,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:52:35,905 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:52:35,905 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] [2022-02-10 03:52:35,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-02-10 03:52:36,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:52:36,119 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:52:36,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:52:36,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1938107238, now seen corresponding path program 13 times [2022-02-10 03:52:36,120 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:52:36,120 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887889401] [2022-02-10 03:52:36,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:52:36,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:52:36,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:52:36,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:52:36,706 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:52:36,706 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887889401] [2022-02-10 03:52:36,706 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887889401] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:52:36,706 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649455782] [2022-02-10 03:52:36,706 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:52:36,706 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:52:36,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:52:36,707 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:52:36,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-02-10 03:52:36,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:52:36,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-10 03:52:36,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:52:37,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:52:37,146 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:52:37,146 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-02-10 03:52:37,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:52:37,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:52:38,500 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-10 03:52:38,502 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 339 treesize of output 261 [2022-02-10 03:52:46,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:52:46,181 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649455782] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:52:46,181 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:52:46,181 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-10 03:52:46,181 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280518975] [2022-02-10 03:52:46,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:52:46,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-10 03:52:46,181 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:52:46,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-10 03:52:46,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:52:46,182 INFO L87 Difference]: Start difference. First operand 1327 states and 2969 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:52:48,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:52:48,219 INFO L93 Difference]: Finished difference Result 1667 states and 3583 transitions. [2022-02-10 03:52:48,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-10 03:52:48,220 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 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 26 [2022-02-10 03:52:48,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:52:48,222 INFO L225 Difference]: With dead ends: 1667 [2022-02-10 03:52:48,222 INFO L226 Difference]: Without dead ends: 1653 [2022-02-10 03:52:48,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=203, Invalid=1057, Unknown=0, NotChecked=0, Total=1260 [2022-02-10 03:52:48,223 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 149 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-10 03:52:48,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 156 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-10 03:52:48,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1653 states. [2022-02-10 03:52:48,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1653 to 1333. [2022-02-10 03:52:48,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1333 states, 1332 states have (on average 2.2372372372372373) internal successors, (2980), 1332 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) [2022-02-10 03:52:48,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1333 states to 1333 states and 2980 transitions. [2022-02-10 03:52:48,240 INFO L78 Accepts]: Start accepts. Automaton has 1333 states and 2980 transitions. Word has length 26 [2022-02-10 03:52:48,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:52:48,240 INFO L470 AbstractCegarLoop]: Abstraction has 1333 states and 2980 transitions. [2022-02-10 03:52:48,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:52:48,240 INFO L276 IsEmpty]: Start isEmpty. Operand 1333 states and 2980 transitions. [2022-02-10 03:52:48,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:52:48,241 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:52:48,241 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] [2022-02-10 03:52:48,259 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-02-10 03:52:48,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:52:48,442 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:52:48,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:52:48,442 INFO L85 PathProgramCache]: Analyzing trace with hash -400894506, now seen corresponding path program 14 times [2022-02-10 03:52:48,443 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:52:48,443 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997309447] [2022-02-10 03:52:48,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:52:48,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:52:48,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:52:49,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:52:49,105 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:52:49,105 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997309447] [2022-02-10 03:52:49,105 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997309447] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:52:49,105 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187190066] [2022-02-10 03:52:49,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:52:49,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:52:49,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:52:49,107 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:52:49,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-02-10 03:52:49,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:52:49,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:52:49,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-10 03:52:49,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:52:49,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:52:49,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:52:49,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-02-10 03:52:50,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:52:50,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:52:51,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:52:51,896 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:52:51,897 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 335 treesize of output 261 [2022-02-10 03:53:00,728 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:53:00,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187190066] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:53:00,729 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:53:00,729 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-10 03:53:00,729 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997437857] [2022-02-10 03:53:00,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:53:00,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-10 03:53:00,729 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:53:00,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-10 03:53:00,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:53:00,729 INFO L87 Difference]: Start difference. First operand 1333 states and 2980 transitions. Second operand has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:53:05,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:53:05,070 INFO L93 Difference]: Finished difference Result 1792 states and 3787 transitions. [2022-02-10 03:53:05,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-10 03:53:05,070 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:53:05,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:53:05,073 INFO L225 Difference]: With dead ends: 1792 [2022-02-10 03:53:05,073 INFO L226 Difference]: Without dead ends: 1782 [2022-02-10 03:53:05,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=603, Invalid=3057, Unknown=0, NotChecked=0, Total=3660 [2022-02-10 03:53:05,074 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 293 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-10 03:53:05,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 175 Invalid, 894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 750 Invalid, 0 Unknown, 57 Unchecked, 0.5s Time] [2022-02-10 03:53:05,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1782 states. [2022-02-10 03:53:05,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1782 to 1344. [2022-02-10 03:53:05,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1344 states, 1343 states have (on average 2.2390171258376768) internal successors, (3007), 1343 states have internal predecessors, (3007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:53:05,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1344 states to 1344 states and 3007 transitions. [2022-02-10 03:53:05,089 INFO L78 Accepts]: Start accepts. Automaton has 1344 states and 3007 transitions. Word has length 26 [2022-02-10 03:53:05,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:53:05,089 INFO L470 AbstractCegarLoop]: Abstraction has 1344 states and 3007 transitions. [2022-02-10 03:53:05,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:53:05,089 INFO L276 IsEmpty]: Start isEmpty. Operand 1344 states and 3007 transitions. [2022-02-10 03:53:05,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:53:05,090 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:53:05,090 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] [2022-02-10 03:53:05,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-02-10 03:53:05,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-02-10 03:53:05,291 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:53:05,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:53:05,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1458190486, now seen corresponding path program 15 times [2022-02-10 03:53:05,291 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:53:05,291 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146133674] [2022-02-10 03:53:05,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:53:05,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:53:05,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:53:06,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:53:06,105 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:53:06,105 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146133674] [2022-02-10 03:53:06,105 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146133674] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:53:06,105 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002662274] [2022-02-10 03:53:06,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:53:06,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:53:06,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:53:06,106 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:53:06,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-02-10 03:53:06,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:53:06,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:53:06,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-10 03:53:06,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:53:07,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:53:07,219 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:53:07,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-02-10 03:53:09,150 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:53:09,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:53:10,333 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:53:10,352 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:53:10,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 343 treesize of output 269 [2022-02-10 03:53:14,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:53:14,790 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002662274] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:53:14,790 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:53:14,790 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 27 [2022-02-10 03:53:14,790 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659043118] [2022-02-10 03:53:14,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:53:14,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-10 03:53:14,790 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:53:14,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-10 03:53:14,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-02-10 03:53:14,791 INFO L87 Difference]: Start difference. First operand 1344 states and 3007 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:53:24,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:53:24,166 INFO L93 Difference]: Finished difference Result 2235 states and 4650 transitions. [2022-02-10 03:53:24,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-10 03:53:24,166 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:53:24,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:53:24,170 INFO L225 Difference]: With dead ends: 2235 [2022-02-10 03:53:24,170 INFO L226 Difference]: Without dead ends: 2223 [2022-02-10 03:53:24,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1686 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=1005, Invalid=4695, Unknown=0, NotChecked=0, Total=5700 [2022-02-10 03:53:24,171 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 403 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 1231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-10 03:53:24,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [403 Valid, 265 Invalid, 1231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1099 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-10 03:53:24,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2223 states. [2022-02-10 03:53:24,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2223 to 1350. [2022-02-10 03:53:24,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1350 states, 1349 states have (on average 2.236471460340993) internal successors, (3017), 1349 states have internal predecessors, (3017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:53:24,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 3017 transitions. [2022-02-10 03:53:24,189 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 3017 transitions. Word has length 26 [2022-02-10 03:53:24,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:53:24,189 INFO L470 AbstractCegarLoop]: Abstraction has 1350 states and 3017 transitions. [2022-02-10 03:53:24,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:53:24,189 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 3017 transitions. [2022-02-10 03:53:24,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:53:24,191 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:53:24,191 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] [2022-02-10 03:53:24,211 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-02-10 03:53:24,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:53:24,392 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:53:24,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:53:24,392 INFO L85 PathProgramCache]: Analyzing trace with hash 302137114, now seen corresponding path program 16 times [2022-02-10 03:53:24,392 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:53:24,392 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429398765] [2022-02-10 03:53:24,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:53:24,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:53:24,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:53:24,961 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:53:24,962 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:53:24,962 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429398765] [2022-02-10 03:53:24,962 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429398765] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:53:24,962 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894556803] [2022-02-10 03:53:24,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:53:24,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:53:24,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:53:24,963 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:53:24,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-02-10 03:53:24,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:53:24,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:53:24,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-10 03:53:24,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:53:25,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:53:25,483 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:53:25,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-02-10 03:53:26,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:53:26,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:53:28,560 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-10 03:53:28,561 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 343 treesize of output 269 [2022-02-10 03:53:43,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:53:43,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894556803] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:53:43,954 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:53:43,954 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:53:43,954 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040341677] [2022-02-10 03:53:43,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:53:43,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:53:43,955 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:53:43,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:53:43,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:53:43,955 INFO L87 Difference]: Start difference. First operand 1350 states and 3017 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:53:45,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:53:45,826 INFO L93 Difference]: Finished difference Result 1758 states and 3741 transitions. [2022-02-10 03:53:45,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-10 03:53:45,826 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 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 26 [2022-02-10 03:53:45,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:53:45,829 INFO L225 Difference]: With dead ends: 1758 [2022-02-10 03:53:45,829 INFO L226 Difference]: Without dead ends: 1746 [2022-02-10 03:53:45,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=189, Invalid=933, Unknown=0, NotChecked=0, Total=1122 [2022-02-10 03:53:45,829 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 178 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:53:45,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 218 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 524 Invalid, 0 Unknown, 21 Unchecked, 0.3s Time] [2022-02-10 03:53:45,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1746 states. [2022-02-10 03:53:45,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1746 to 1350. [2022-02-10 03:53:45,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1350 states, 1349 states have (on average 2.236471460340993) internal successors, (3017), 1349 states have internal predecessors, (3017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:53:45,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 3017 transitions. [2022-02-10 03:53:45,846 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 3017 transitions. Word has length 26 [2022-02-10 03:53:45,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:53:45,846 INFO L470 AbstractCegarLoop]: Abstraction has 1350 states and 3017 transitions. [2022-02-10 03:53:45,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:53:45,846 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 3017 transitions. [2022-02-10 03:53:45,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:53:45,848 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:53:45,848 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] [2022-02-10 03:53:45,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-02-10 03:53:46,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:53:46,067 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:53:46,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:53:46,068 INFO L85 PathProgramCache]: Analyzing trace with hash -188218022, now seen corresponding path program 17 times [2022-02-10 03:53:46,068 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:53:46,068 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335543236] [2022-02-10 03:53:46,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:53:46,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:53:46,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:53:46,583 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:53:46,583 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:53:46,583 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335543236] [2022-02-10 03:53:46,583 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335543236] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:53:46,583 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784506499] [2022-02-10 03:53:46,583 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:53:46,583 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:53:46,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:53:46,584 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:53:46,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-02-10 03:53:46,608 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 03:53:46,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:53:46,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-10 03:53:46,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:53:47,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:53:47,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:53:47,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:53:47,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:53:47,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 75 [2022-02-10 03:53:47,224 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:53:47,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:53:48,522 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-10 03:53:48,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 371 treesize of output 253 [2022-02-10 03:53:50,245 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:53:50,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784506499] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:53:50,245 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:53:50,245 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-02-10 03:53:50,245 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788375159] [2022-02-10 03:53:50,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:53:50,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:53:50,245 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:53:50,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:53:50,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:53:50,246 INFO L87 Difference]: Start difference. First operand 1350 states and 3017 transitions. Second operand has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:53:52,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:53:52,610 INFO L93 Difference]: Finished difference Result 1755 states and 3861 transitions. [2022-02-10 03:53:52,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-10 03:53:52,610 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:53:52,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:53:52,612 INFO L225 Difference]: With dead ends: 1755 [2022-02-10 03:53:52,613 INFO L226 Difference]: Without dead ends: 1743 [2022-02-10 03:53:52,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=439, Invalid=2531, Unknown=0, NotChecked=0, Total=2970 [2022-02-10 03:53:52,613 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 192 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-10 03:53:52,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 183 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-10 03:53:52,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1743 states. [2022-02-10 03:53:52,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1743 to 1353. [2022-02-10 03:53:52,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1353 states, 1352 states have (on average 2.2366863905325443) internal successors, (3024), 1352 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:53:52,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1353 states to 1353 states and 3024 transitions. [2022-02-10 03:53:52,629 INFO L78 Accepts]: Start accepts. Automaton has 1353 states and 3024 transitions. Word has length 26 [2022-02-10 03:53:52,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:53:52,629 INFO L470 AbstractCegarLoop]: Abstraction has 1353 states and 3024 transitions. [2022-02-10 03:53:52,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:53:52,629 INFO L276 IsEmpty]: Start isEmpty. Operand 1353 states and 3024 transitions. [2022-02-10 03:53:52,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:53:52,631 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:53:52,631 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] [2022-02-10 03:53:52,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-02-10 03:53:52,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-02-10 03:53:52,831 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:53:52,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:53:52,832 INFO L85 PathProgramCache]: Analyzing trace with hash -585222294, now seen corresponding path program 18 times [2022-02-10 03:53:52,832 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:53:52,832 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488422877] [2022-02-10 03:53:52,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:53:52,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:53:52,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:53:53,213 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:53:53,213 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:53:53,213 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488422877] [2022-02-10 03:53:53,213 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488422877] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:53:53,213 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215490169] [2022-02-10 03:53:53,213 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:53:53,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:53:53,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:53:53,214 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:53:53,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-02-10 03:53:53,237 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 03:53:53,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:53:53,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-10 03:53:53,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:53:53,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:53:53,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:53:53,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:53:53,782 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:53:53,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 127 treesize of output 103 [2022-02-10 03:53:54,562 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:53:54,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:53:56,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:53:56,685 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:53:56,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:53:56,700 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:53:56,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 375 treesize of output 247 [2022-02-10 03:53:57,617 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:53:57,617 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215490169] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:53:57,617 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:53:57,617 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-02-10 03:53:57,618 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169071948] [2022-02-10 03:53:57,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:53:57,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-10 03:53:57,618 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:53:57,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-10 03:53:57,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2022-02-10 03:53:57,618 INFO L87 Difference]: Start difference. First operand 1353 states and 3024 transitions. Second operand has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:54:05,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:54:05,656 INFO L93 Difference]: Finished difference Result 1891 states and 4065 transitions. [2022-02-10 03:54:05,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-10 03:54:05,656 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:54:05,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:54:05,659 INFO L225 Difference]: With dead ends: 1891 [2022-02-10 03:54:05,659 INFO L226 Difference]: Without dead ends: 1858 [2022-02-10 03:54:05,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1432 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=824, Invalid=4006, Unknown=0, NotChecked=0, Total=4830 [2022-02-10 03:54:05,660 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 244 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 1077 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 1150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-10 03:54:05,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 249 Invalid, 1150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1077 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-10 03:54:05,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2022-02-10 03:54:05,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1367. [2022-02-10 03:54:05,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1367 states, 1366 states have (on average 2.234260614934114) internal successors, (3052), 1366 states have internal predecessors, (3052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:54:05,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1367 states to 1367 states and 3052 transitions. [2022-02-10 03:54:05,677 INFO L78 Accepts]: Start accepts. Automaton has 1367 states and 3052 transitions. Word has length 26 [2022-02-10 03:54:05,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:54:05,677 INFO L470 AbstractCegarLoop]: Abstraction has 1367 states and 3052 transitions. [2022-02-10 03:54:05,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:54:05,677 INFO L276 IsEmpty]: Start isEmpty. Operand 1367 states and 3052 transitions. [2022-02-10 03:54:05,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:54:05,679 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:54:05,679 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] [2022-02-10 03:54:05,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-02-10 03:54:05,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-02-10 03:54:05,880 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:54:05,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:54:05,880 INFO L85 PathProgramCache]: Analyzing trace with hash -915805738, now seen corresponding path program 17 times [2022-02-10 03:54:05,880 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:54:05,880 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240831945] [2022-02-10 03:54:05,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:54:05,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:54:05,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:54:06,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:54:06,440 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:54:06,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240831945] [2022-02-10 03:54:06,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240831945] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:54:06,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396025619] [2022-02-10 03:54:06,440 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:54:06,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:54:06,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:54:06,441 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:54:06,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-02-10 03:54:06,467 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 03:54:06,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:54:06,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-10 03:54:06,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:54:07,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:54:07,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:54:07,152 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-02-10 03:54:07,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:54:07,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:54:08,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:54:08,291 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:54:08,291 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 335 treesize of output 269 [2022-02-10 03:54:46,077 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:54:46,078 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396025619] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:54:46,078 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:54:46,078 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-02-10 03:54:46,078 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90515780] [2022-02-10 03:54:46,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:54:46,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-10 03:54:46,078 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:54:46,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-10 03:54:46,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2022-02-10 03:54:46,079 INFO L87 Difference]: Start difference. First operand 1367 states and 3052 transitions. Second operand has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:54:54,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:54:54,013 INFO L93 Difference]: Finished difference Result 2027 states and 4209 transitions. [2022-02-10 03:54:54,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-10 03:54:54,014 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:54:54,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:54:54,016 INFO L225 Difference]: With dead ends: 2027 [2022-02-10 03:54:54,016 INFO L226 Difference]: Without dead ends: 2005 [2022-02-10 03:54:54,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2593 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=1162, Invalid=7210, Unknown=0, NotChecked=0, Total=8372 [2022-02-10 03:54:54,018 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 310 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 1141 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 1203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-10 03:54:54,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 238 Invalid, 1203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1141 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-10 03:54:54,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2005 states. [2022-02-10 03:54:54,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2005 to 1428. [2022-02-10 03:54:54,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1428 states, 1427 states have (on average 2.222144358794674) internal successors, (3171), 1427 states have internal predecessors, (3171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:54:54,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 3171 transitions. [2022-02-10 03:54:54,035 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 3171 transitions. Word has length 26 [2022-02-10 03:54:54,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:54:54,035 INFO L470 AbstractCegarLoop]: Abstraction has 1428 states and 3171 transitions. [2022-02-10 03:54:54,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:54:54,035 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 3171 transitions. [2022-02-10 03:54:54,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:54:54,036 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:54:54,037 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] [2022-02-10 03:54:54,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-02-10 03:54:54,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-02-10 03:54:54,237 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:54:54,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:54:54,237 INFO L85 PathProgramCache]: Analyzing trace with hash -306479974, now seen corresponding path program 18 times [2022-02-10 03:54:54,238 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:54:54,238 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805623056] [2022-02-10 03:54:54,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:54:54,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:54:54,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:54:54,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:54:54,589 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:54:54,589 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805623056] [2022-02-10 03:54:54,589 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805623056] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:54:54,589 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298308328] [2022-02-10 03:54:54,589 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:54:54,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:54:54,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:54:54,590 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:54:54,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-02-10 03:54:54,614 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:54:54,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:54:54,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-10 03:54:54,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:54:55,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:54:55,217 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:54:55,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 159 treesize of output 117 [2022-02-10 03:54:57,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:54:57,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:54:58,636 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:54:58,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:54:58,658 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:54:58,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 327 treesize of output 253 [2022-02-10 03:55:06,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:55:06,931 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298308328] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:55:06,931 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:55:06,931 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 27 [2022-02-10 03:55:06,932 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632710671] [2022-02-10 03:55:06,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:55:06,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-10 03:55:06,932 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:55:06,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-10 03:55:06,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2022-02-10 03:55:06,932 INFO L87 Difference]: Start difference. First operand 1428 states and 3171 transitions. Second operand has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 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) [2022-02-10 03:55:10,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:55:10,472 INFO L93 Difference]: Finished difference Result 1939 states and 4065 transitions. [2022-02-10 03:55:10,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-10 03:55:10,472 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 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 26 [2022-02-10 03:55:10,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:55:10,475 INFO L225 Difference]: With dead ends: 1939 [2022-02-10 03:55:10,475 INFO L226 Difference]: Without dead ends: 1933 [2022-02-10 03:55:10,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=464, Invalid=1986, Unknown=0, NotChecked=0, Total=2450 [2022-02-10 03:55:10,475 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 320 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-10 03:55:10,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 174 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-10 03:55:10,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1933 states. [2022-02-10 03:55:10,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1933 to 1428. [2022-02-10 03:55:10,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1428 states, 1427 states have (on average 2.222144358794674) internal successors, (3171), 1427 states have internal predecessors, (3171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:55:10,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 3171 transitions. [2022-02-10 03:55:10,493 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 3171 transitions. Word has length 26 [2022-02-10 03:55:10,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:55:10,493 INFO L470 AbstractCegarLoop]: Abstraction has 1428 states and 3171 transitions. [2022-02-10 03:55:10,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 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) [2022-02-10 03:55:10,493 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 3171 transitions. [2022-02-10 03:55:10,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:55:10,495 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:55:10,495 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] [2022-02-10 03:55:10,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-02-10 03:55:10,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-02-10 03:55:10,695 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:55:10,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:55:10,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1787735454, now seen corresponding path program 19 times [2022-02-10 03:55:10,696 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:55:10,696 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480916253] [2022-02-10 03:55:10,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:55:10,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:55:10,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:55:10,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:55:10,926 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:55:10,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480916253] [2022-02-10 03:55:10,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480916253] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:55:10,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999509609] [2022-02-10 03:55:10,926 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:55:10,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:55:10,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:55:10,927 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:55:10,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-02-10 03:55:10,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:55:10,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-10 03:55:10,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:55:11,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:55:11,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:55:11,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 65 [2022-02-10 03:55:11,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:55:11,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:55:12,448 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-10 03:55:12,448 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 339 treesize of output 261 [2022-02-10 03:56:19,766 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:56:19,766 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999509609] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:56:19,766 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:56:19,767 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-02-10 03:56:19,767 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469880763] [2022-02-10 03:56:19,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:56:19,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-10 03:56:19,767 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:56:19,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-10 03:56:19,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:56:19,767 INFO L87 Difference]: Start difference. First operand 1428 states and 3171 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:56:23,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:56:23,226 INFO L93 Difference]: Finished difference Result 1942 states and 4168 transitions. [2022-02-10 03:56:23,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-10 03:56:23,227 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:56:23,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:56:23,229 INFO L225 Difference]: With dead ends: 1942 [2022-02-10 03:56:23,229 INFO L226 Difference]: Without dead ends: 1926 [2022-02-10 03:56:23,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=431, Invalid=2119, Unknown=0, NotChecked=0, Total=2550 [2022-02-10 03:56:23,230 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 204 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-10 03:56:23,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 148 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 606 Invalid, 0 Unknown, 47 Unchecked, 0.4s Time] [2022-02-10 03:56:23,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1926 states. [2022-02-10 03:56:23,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1926 to 1428. [2022-02-10 03:56:23,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1428 states, 1427 states have (on average 2.2214435879467413) internal successors, (3170), 1427 states have internal predecessors, (3170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:56:23,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 3170 transitions. [2022-02-10 03:56:23,245 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 3170 transitions. Word has length 26 [2022-02-10 03:56:23,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:56:23,246 INFO L470 AbstractCegarLoop]: Abstraction has 1428 states and 3170 transitions. [2022-02-10 03:56:23,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:56:23,246 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 3170 transitions. [2022-02-10 03:56:23,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:56:23,247 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:56:23,248 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] [2022-02-10 03:56:23,264 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-02-10 03:56:23,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-02-10 03:56:23,464 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:56:23,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:56:23,464 INFO L85 PathProgramCache]: Analyzing trace with hash -162675810, now seen corresponding path program 20 times [2022-02-10 03:56:23,464 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:56:23,464 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805448175] [2022-02-10 03:56:23,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:56:23,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:56:23,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:56:23,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:56:23,893 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:56:23,893 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805448175] [2022-02-10 03:56:23,893 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805448175] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:56:23,893 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503389392] [2022-02-10 03:56:23,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:56:23,893 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:56:23,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:56:23,895 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:56:23,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-02-10 03:56:23,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:56:23,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:56:23,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-10 03:56:23,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:56:24,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:56:24,489 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:56:24,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 90 treesize of output 82 [2022-02-10 03:56:27,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:56:27,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:56:32,419 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:56:32,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 307 treesize of output 265 [2022-02-10 03:58:58,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:58:58,129 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503389392] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:58:58,129 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:58:58,129 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-02-10 03:58:58,129 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071953920] [2022-02-10 03:58:58,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:58:58,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-10 03:58:58,129 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:58:58,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-10 03:58:58,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:58:58,130 INFO L87 Difference]: Start difference. First operand 1428 states and 3170 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:58:59,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:58:59,867 INFO L93 Difference]: Finished difference Result 1758 states and 3771 transitions. [2022-02-10 03:58:59,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-10 03:58:59,867 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:58:59,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:58:59,870 INFO L225 Difference]: With dead ends: 1758 [2022-02-10 03:58:59,870 INFO L226 Difference]: Without dead ends: 1746 [2022-02-10 03:58:59,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 36 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=360, Invalid=1446, Unknown=0, NotChecked=0, Total=1806 [2022-02-10 03:58:59,871 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 193 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 295 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:58:59,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 105 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 345 Invalid, 0 Unknown, 295 Unchecked, 0.2s Time] [2022-02-10 03:58:59,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1746 states. [2022-02-10 03:58:59,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1746 to 1442. [2022-02-10 03:58:59,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 2.219292158223456) internal successors, (3198), 1441 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:58:59,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 3198 transitions. [2022-02-10 03:58:59,887 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 3198 transitions. Word has length 26 [2022-02-10 03:58:59,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:58:59,887 INFO L470 AbstractCegarLoop]: Abstraction has 1442 states and 3198 transitions. [2022-02-10 03:58:59,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:58:59,887 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 3198 transitions. [2022-02-10 03:58:59,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:58:59,889 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:58:59,889 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] [2022-02-10 03:58:59,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-02-10 03:59:00,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-02-10 03:59:00,090 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:59:00,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:59:00,090 INFO L85 PathProgramCache]: Analyzing trace with hash 870573974, now seen corresponding path program 21 times [2022-02-10 03:59:00,090 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:59:00,090 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925672120] [2022-02-10 03:59:00,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:59:00,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:59:00,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:59:00,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:59:00,470 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:59:00,470 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925672120] [2022-02-10 03:59:00,470 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925672120] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:59:00,470 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043120555] [2022-02-10 03:59:00,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:59:00,471 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:59:00,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:59:00,472 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:59:00,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-02-10 03:59:00,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:59:00,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:59:00,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-10 03:59:00,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:59:02,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:59:02,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:59:02,256 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:59:02,256 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-02-10 03:59:02,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:59:02,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:59:05,181 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:59:05,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 311 treesize of output 273 [2022-02-10 04:00:20,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:20,894 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043120555] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:00:20,894 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:00:20,895 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-10 04:00:20,907 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887691748] [2022-02-10 04:00:20,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:00:20,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 04:00:20,907 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:00:20,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 04:00:20,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2022-02-10 04:00:20,908 INFO L87 Difference]: Start difference. First operand 1442 states and 3198 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:00:22,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:00:22,232 INFO L93 Difference]: Finished difference Result 1688 states and 3672 transitions. [2022-02-10 04:00:22,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-10 04:00:22,232 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 04:00:22,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:00:22,234 INFO L225 Difference]: With dead ends: 1688 [2022-02-10 04:00:22,234 INFO L226 Difference]: Without dead ends: 1678 [2022-02-10 04:00:22,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=342, Invalid=1638, Unknown=0, NotChecked=0, Total=1980 [2022-02-10 04:00:22,235 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 138 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 04:00:22,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 109 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 246 Invalid, 0 Unknown, 171 Unchecked, 0.2s Time] [2022-02-10 04:00:22,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1678 states. [2022-02-10 04:00:22,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1678 to 1442. [2022-02-10 04:00:22,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 2.219292158223456) internal successors, (3198), 1441 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:00:22,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 3198 transitions. [2022-02-10 04:00:22,252 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 3198 transitions. Word has length 26 [2022-02-10 04:00:22,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:00:22,252 INFO L470 AbstractCegarLoop]: Abstraction has 1442 states and 3198 transitions. [2022-02-10 04:00:22,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:00:22,252 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 3198 transitions. [2022-02-10 04:00:22,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 04:00:22,254 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:00:22,254 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] [2022-02-10 04:00:22,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-02-10 04:00:22,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-02-10 04:00:22,463 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:00:22,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:00:22,464 INFO L85 PathProgramCache]: Analyzing trace with hash 483673174, now seen corresponding path program 22 times [2022-02-10 04:00:22,464 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:00:22,464 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218677511] [2022-02-10 04:00:22,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:00:22,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:00:22,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:00:22,711 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:22,712 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:00:22,712 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218677511] [2022-02-10 04:00:22,712 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218677511] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:00:22,712 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585974720] [2022-02-10 04:00:22,712 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 04:00:22,712 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:00:22,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:00:22,713 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:00:22,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-02-10 04:00:22,738 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 04:00:22,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 04:00:22,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-10 04:00:22,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:00:23,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 04:00:23,089 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 04:00:23,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-02-10 04:00:23,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:23,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:00:24,408 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-10 04:00:24,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 327 treesize of output 261 [2022-02-10 04:00:58,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:58,845 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585974720] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:00:58,845 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:00:58,845 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-02-10 04:00:58,846 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738044889] [2022-02-10 04:00:58,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:00:58,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-10 04:00:58,846 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:00:58,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-10 04:00:58,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2022-02-10 04:00:58,846 INFO L87 Difference]: Start difference. First operand 1442 states and 3198 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:01:00,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:01:00,105 INFO L93 Difference]: Finished difference Result 1819 states and 3897 transitions. [2022-02-10 04:01:00,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-10 04:01:00,105 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 04:01:00,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:01:00,108 INFO L225 Difference]: With dead ends: 1819 [2022-02-10 04:01:00,108 INFO L226 Difference]: Without dead ends: 1812 [2022-02-10 04:01:00,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=182, Invalid=940, Unknown=0, NotChecked=0, Total=1122 [2022-02-10 04:01:00,108 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 121 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-10 04:01:00,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 297 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-10 04:01:00,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1812 states. [2022-02-10 04:01:00,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1812 to 1455. [2022-02-10 04:01:00,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1455 states, 1454 states have (on average 2.2193947730398897) internal successors, (3227), 1454 states have internal predecessors, (3227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:01:00,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1455 states to 1455 states and 3227 transitions. [2022-02-10 04:01:00,126 INFO L78 Accepts]: Start accepts. Automaton has 1455 states and 3227 transitions. Word has length 26 [2022-02-10 04:01:00,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:01:00,126 INFO L470 AbstractCegarLoop]: Abstraction has 1455 states and 3227 transitions. [2022-02-10 04:01:00,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:01:00,126 INFO L276 IsEmpty]: Start isEmpty. Operand 1455 states and 3227 transitions. [2022-02-10 04:01:00,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 04:01:00,128 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:01:00,128 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] [2022-02-10 04:01:00,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-02-10 04:01:00,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-02-10 04:01:00,329 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:01:00,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:01:00,329 INFO L85 PathProgramCache]: Analyzing trace with hash -285479398, now seen corresponding path program 23 times [2022-02-10 04:01:00,329 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:01:00,329 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887238321] [2022-02-10 04:01:00,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:01:00,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:01:00,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:01:01,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:01:01,158 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:01:01,159 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887238321] [2022-02-10 04:01:01,159 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887238321] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:01:01,159 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24098008] [2022-02-10 04:01:01,159 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 04:01:01,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:01:01,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:01:01,160 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:01:01,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-02-10 04:01:01,185 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 04:01:01,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 04:01:01,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-10 04:01:01,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:01:01,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 04:01:01,981 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 04:01:01,981 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 73 [2022-02-10 04:01:03,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:01:03,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:01:05,698 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 04:01:05,727 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 04:01:05,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 459 treesize of output 333 Received shutdown request... [2022-02-10 04:01:39,347 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-02-10 04:01:39,349 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-02-10 04:01:39,349 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-02-10 04:01:39,351 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-02-10 04:01:39,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-02-10 04:01:39,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:01:39,552 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 25ms.. [2022-02-10 04:01:39,553 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-02-10 04:01:39,553 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-02-10 04:01:39,553 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-02-10 04:01:39,555 INFO L732 BasicCegarLoop]: Path program histogram: [23, 18, 1, 1, 1] [2022-02-10 04:01:39,556 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-02-10 04:01:39,556 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-10 04:01:39,558 INFO L202 PluginConnector]: Adding new model min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.02 04:01:39 BasicIcfg [2022-02-10 04:01:39,558 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-10 04:01:39,560 INFO L158 Benchmark]: Toolchain (without parser) took 814575.23ms. Allocated memory was 167.8MB in the beginning and 5.5GB in the end (delta: 5.3GB). Free memory was 133.1MB in the beginning and 4.1GB in the end (delta: -4.0GB). Peak memory consumption was 4.0GB. Max. memory is 8.0GB. [2022-02-10 04:01:39,560 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.11ms. Allocated memory is still 167.8MB. Free memory is still 134.3MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-10 04:01:39,560 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.06ms. Allocated memory is still 167.8MB. Free memory was 133.1MB in the beginning and 131.6MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-10 04:01:39,560 INFO L158 Benchmark]: Boogie Preprocessor took 20.97ms. Allocated memory is still 167.8MB. Free memory was 131.6MB in the beginning and 130.5MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-10 04:01:39,560 INFO L158 Benchmark]: RCFGBuilder took 198.31ms. Allocated memory is still 167.8MB. Free memory was 130.5MB in the beginning and 121.0MB in the end (delta: 9.5MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-02-10 04:01:39,560 INFO L158 Benchmark]: TraceAbstraction took 814332.35ms. Allocated memory was 167.8MB in the beginning and 5.5GB in the end (delta: 5.3GB). Free memory was 120.5MB in the beginning and 4.1GB in the end (delta: -4.0GB). Peak memory consumption was 4.0GB. Max. memory is 8.0GB. [2022-02-10 04:01:39,561 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11ms. Allocated memory is still 167.8MB. Free memory is still 134.3MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 19.06ms. Allocated memory is still 167.8MB. Free memory was 133.1MB in the beginning and 131.6MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 20.97ms. Allocated memory is still 167.8MB. Free memory was 131.6MB in the beginning and 130.5MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 198.31ms. Allocated memory is still 167.8MB. Free memory was 130.5MB in the beginning and 121.0MB in the end (delta: 9.5MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 814332.35ms. Allocated memory was 167.8MB in the beginning and 5.5GB in the end (delta: 5.3GB). Free memory was 120.5MB in the beginning and 4.1GB in the end (delta: -4.0GB). Peak memory consumption was 4.0GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Independence queries for same thread: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 25ms.. - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 25ms.. - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 25ms.. - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 25ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 814.3s, OverallIterations: 44, TraceHistogramMax: 2, PathProgramHistogramMax: 23, EmptinessCheckTime: 1.2s, AutomataDifference: 168.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.6s, PartialOrderReductionTime: 5.6s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 9290 SdHoareTripleChecker+Valid, 18.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 9290 mSDsluCounter, 6956 SdHoareTripleChecker+Invalid, 15.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1818 IncrementalHoareTripleChecker+Unchecked, 9416 mSDsCounter, 2200 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 27552 IncrementalHoareTripleChecker+Invalid, 31570 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2200 mSolverCounterUnsat, 782 mSDtfsCounter, 27552 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3580 GetRequests, 1473 SyntacticMatches, 90 SemanticMatches, 2017 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41349 ImplicationChecksByTransitivity, 164.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=183322occurred in iteration=0, InterpolantAutomatonStates: 1513, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.2s AutomataMinimizationTime, 43 MinimizatonAttempts, 74311 StatesRemovedByMinimization, 43 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 588.5s InterpolantComputationTime, 2062 NumberOfCodeBlocks, 2058 NumberOfCodeBlocksAsserted, 127 NumberOfCheckSat, 2941 ConstructedInterpolants, 30 QuantifiedInterpolants, 100805 SizeOfPredicates, 494 NumberOfNonLiveVariables, 2615 ConjunctsInSsa, 798 ConjunctsInUnsatCore, 123 InterpolantComputations, 3 PerfectInterpolantSequences, 92/659 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown