/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/sum-fun.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-44898dd [2022-02-10 03:57:10,622 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-10 03:57:10,623 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-10 03:57:10,677 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-10 03:57:10,705 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 03:57:10,732 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-10 03:57:10,732 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-10 03:57:10,733 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-10 03:57:10,733 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-10 03:57:10,734 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-10 03:57:10,734 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-10 03:57:10,734 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-10 03:57:10,734 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-10 03:57:10,734 INFO L138 SettingsManager]: * Use SBE=true [2022-02-10 03:57:10,735 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-10 03:57:10,735 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-10 03:57:10,735 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-10 03:57:10,736 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-10 03:57:10,736 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-10 03:57:10,736 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-10 03:57:10,736 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-10 03:57:10,736 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-10 03:57:10,736 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-10 03:57:10,736 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-10 03:57:10,736 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-10 03:57:10,736 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-10 03:57:10,737 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-10 03:57:10,737 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-10 03:57:10,737 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-10 03:57:10,738 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-10 03:57:10,738 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-10 03:57:10,738 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-10 03:57:10,738 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-10 03:57:10,738 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-10 03:57:10,739 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-10 03:57:10,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-10 03:57:10,739 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-10 03:57:10,739 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-10 03:57:10,739 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=MCR_WITH_DEPRANKS [2022-02-10 03:57:10,739 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-10 03:57:10,952 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-10 03:57:10,975 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-10 03:57:10,976 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-10 03:57:10,977 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-10 03:57:10,978 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-10 03:57:10,979 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-fun.wvr.bpl [2022-02-10 03:57:10,979 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-fun.wvr.bpl' [2022-02-10 03:57:11,003 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-10 03:57:11,004 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-10 03:57:11,005 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-10 03:57:11,005 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-10 03:57:11,006 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-10 03:57:11,013 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:57:11" (1/1) ... [2022-02-10 03:57:11,018 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:57:11" (1/1) ... [2022-02-10 03:57:11,023 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-10 03:57:11,024 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-10 03:57:11,025 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-10 03:57:11,025 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-10 03:57:11,025 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-10 03:57:11,030 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:57:11" (1/1) ... [2022-02-10 03:57:11,031 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:57:11" (1/1) ... [2022-02-10 03:57:11,032 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:57:11" (1/1) ... [2022-02-10 03:57:11,032 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:57:11" (1/1) ... [2022-02-10 03:57:11,034 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:57:11" (1/1) ... [2022-02-10 03:57:11,036 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:57:11" (1/1) ... [2022-02-10 03:57:11,038 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:57:11" (1/1) ... [2022-02-10 03:57:11,039 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-10 03:57:11,041 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-10 03:57:11,041 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-10 03:57:11,041 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-10 03:57:11,042 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:57:11" (1/1) ... [2022-02-10 03:57:11,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-10 03:57:11,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:57:11,068 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 03:57:11,071 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 03:57:11,094 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-10 03:57:11,094 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-10 03:57:11,094 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-10 03:57:11,094 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-10 03:57:11,094 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-10 03:57:11,095 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-10 03:57:11,095 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-10 03:57:11,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-10 03:57:11,095 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-10 03:57:11,095 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-02-10 03:57:11,095 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-02-10 03:57:11,095 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-02-10 03:57:11,096 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 03:57:11,139 INFO L234 CfgBuilder]: Building ICFG [2022-02-10 03:57:11,141 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-10 03:57:11,239 INFO L275 CfgBuilder]: Performing block encoding [2022-02-10 03:57:11,252 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-10 03:57:11,252 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-10 03:57:11,254 INFO L202 PluginConnector]: Adding new model sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.02 03:57:11 BoogieIcfgContainer [2022-02-10 03:57:11,254 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-10 03:57:11,256 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-10 03:57:11,256 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-10 03:57:11,259 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-10 03:57:11,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:57:11" (1/2) ... [2022-02-10 03:57:11,260 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e6683a1 and model type sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.02 03:57:11, skipping insertion in model container [2022-02-10 03:57:11,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.02 03:57:11" (2/2) ... [2022-02-10 03:57:11,261 INFO L111 eAbstractionObserver]: Analyzing ICFG sum-fun.wvr.bpl [2022-02-10 03:57:11,266 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-10 03:57:11,266 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-10 03:57:11,266 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-10 03:57:11,266 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-10 03:57:11,309 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-02-10 03:57:11,341 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-10 03:57:11,347 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 03:57:11,347 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-02-10 03:57:11,356 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2022-02-10 03:57:11,406 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 03:57:17,442 INFO L104 alCausalityReduction]: MaximalCausalityReduction evaluated 526838 transitions and produced 183322 states. [2022-02-10 03:57:18,434 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 03:57:18,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-10 03:57:18,662 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:57:18,662 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 03:57:18,663 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:57:18,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:57:18,671 INFO L85 PathProgramCache]: Analyzing trace with hash -234537446, now seen corresponding path program 1 times [2022-02-10 03:57:18,677 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:57:18,678 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092293933] [2022-02-10 03:57:18,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:57:18,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:57:18,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:57:18,806 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 03:57:18,806 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:57:18,806 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092293933] [2022-02-10 03:57:18,811 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092293933] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-10 03:57:18,811 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-10 03:57:18,811 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-10 03:57:18,812 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358432477] [2022-02-10 03:57:18,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-10 03:57:18,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-10 03:57:18,815 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:57:18,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-10 03:57:18,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-10 03:57:19,694 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 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:57:22,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:57:22,158 INFO L93 Difference]: Finished difference Result 179106 states and 252083 transitions. [2022-02-10 03:57:22,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-10 03:57:22,163 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-10 03:57:22,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:57:22,921 INFO L225 Difference]: With dead ends: 179106 [2022-02-10 03:57:22,921 INFO L226 Difference]: Without dead ends: 55816 [2022-02-10 03:57:22,923 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 03:57:22,928 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 63 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 14 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 03:57:22,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 14 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-10 03:57:23,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55816 states. [2022-02-10 03:57:23,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55816 to 134. [2022-02-10 03:57:23,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.037593984962406) internal successors, (271), 133 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:57:23,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 271 transitions. [2022-02-10 03:57:23,732 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 271 transitions. Word has length 18 [2022-02-10 03:57:23,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:57:23,732 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 271 transitions. [2022-02-10 03:57:23,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:57:23,740 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 271 transitions. [2022-02-10 03:57:23,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-10 03:57:23,755 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:57:23,756 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 03:57:23,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-10 03:57:23,756 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:57:23,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:57:23,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1872873864, now seen corresponding path program 1 times [2022-02-10 03:57:23,757 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:57:23,757 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867107825] [2022-02-10 03:57:23,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:57:23,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:57:23,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:57:23,818 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 03:57:23,818 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:57:23,819 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867107825] [2022-02-10 03:57:23,819 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867107825] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-10 03:57:23,819 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-10 03:57:23,819 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-10 03:57:23,819 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181225276] [2022-02-10 03:57:23,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-10 03:57:23,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-10 03:57:23,820 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:57:23,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-10 03:57:23,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-10 03:57:23,840 INFO L87 Difference]: Start difference. First operand 134 states and 271 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 03:57:23,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:57:23,884 INFO L93 Difference]: Finished difference Result 145 states and 282 transitions. [2022-02-10 03:57:23,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-10 03:57:23,885 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 03:57:23,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:57:23,886 INFO L225 Difference]: With dead ends: 145 [2022-02-10 03:57:23,886 INFO L226 Difference]: Without dead ends: 145 [2022-02-10 03:57:23,886 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 03:57:23,887 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 03:57:23,887 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 03:57:23,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-02-10 03:57:23,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 143. [2022-02-10 03:57:23,993 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 03:57:23,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 280 transitions. [2022-02-10 03:57:23,994 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 280 transitions. Word has length 20 [2022-02-10 03:57:23,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:57:23,995 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 280 transitions. [2022-02-10 03:57:23,995 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 03:57:23,995 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 280 transitions. [2022-02-10 03:57:23,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-10 03:57:23,996 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:57:23,996 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 03:57:23,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-10 03:57:23,996 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:57:23,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:57:23,997 INFO L85 PathProgramCache]: Analyzing trace with hash 196648534, now seen corresponding path program 1 times [2022-02-10 03:57:23,997 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:57:23,997 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527047972] [2022-02-10 03:57:23,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:57:23,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:57:24,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:57:24,491 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 03:57:24,491 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:57:24,494 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527047972] [2022-02-10 03:57:24,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527047972] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:57:24,495 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432400424] [2022-02-10 03:57:24,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:57:24,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:57:24,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:57:24,511 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 03:57:24,559 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 03:57:24,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:57:24,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:57:24,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:57:25,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:57:25,093 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 15 treesize of output 11 [2022-02-10 03:57:25,141 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 03:57:25,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:57:25,205 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:57:25,206 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 12 treesize of output 17 [2022-02-10 03:57:25,349 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 03:57:25,349 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432400424] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:57:25,349 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:57:25,349 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-02-10 03:57:25,349 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212384465] [2022-02-10 03:57:25,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:57:25,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 03:57:25,350 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:57:25,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 03:57:25,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-02-10 03:57:25,351 INFO L87 Difference]: Start difference. First operand 143 states and 280 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:57:25,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:57:25,550 INFO L93 Difference]: Finished difference Result 237 states and 443 transitions. [2022-02-10 03:57:25,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-10 03:57:25,551 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-10 03:57:25,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:57:25,552 INFO L225 Difference]: With dead ends: 237 [2022-02-10 03:57:25,552 INFO L226 Difference]: Without dead ends: 232 [2022-02-10 03:57:25,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2022-02-10 03:57:25,553 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 203 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:57:25,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 42 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 128 Invalid, 0 Unknown, 74 Unchecked, 0.1s Time] [2022-02-10 03:57:25,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-02-10 03:57:25,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 158. [2022-02-10 03:57:25,557 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 03:57:25,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 305 transitions. [2022-02-10 03:57:25,558 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 305 transitions. Word has length 22 [2022-02-10 03:57:25,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:57:25,558 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 305 transitions. [2022-02-10 03:57:25,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:57:25,558 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 305 transitions. [2022-02-10 03:57:25,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-10 03:57:25,559 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:57:25,559 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 03:57:25,584 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 03:57:25,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:57:25,772 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:57:25,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:57:25,772 INFO L85 PathProgramCache]: Analyzing trace with hash 805974298, now seen corresponding path program 2 times [2022-02-10 03:57:25,772 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:57:25,773 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531755701] [2022-02-10 03:57:25,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:57:25,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:57:25,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:57:25,954 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 03:57:25,954 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:57:25,954 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531755701] [2022-02-10 03:57:25,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531755701] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:57:25,954 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167689657] [2022-02-10 03:57:25,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:57:25,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:57:25,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:57:25,956 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 03:57:25,957 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 03:57:25,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:57:25,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:57:25,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-10 03:57:25,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:57:26,234 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:57:26,235 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2022-02-10 03:57:26,344 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 03:57:26,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:57:26,420 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:57:26,420 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 12 treesize of output 17 [2022-02-10 03:57:26,540 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 03:57:26,540 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167689657] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:57:26,540 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:57:26,540 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 18 [2022-02-10 03:57:26,541 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332398198] [2022-02-10 03:57:26,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:57:26,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 03:57:26,541 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:57:26,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 03:57:26,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-02-10 03:57:26,542 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 03:57:27,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:57:27,049 INFO L93 Difference]: Finished difference Result 266 states and 502 transitions. [2022-02-10 03:57:27,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 03:57:27,049 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 03:57:27,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:57:27,050 INFO L225 Difference]: With dead ends: 266 [2022-02-10 03:57:27,050 INFO L226 Difference]: Without dead ends: 260 [2022-02-10 03:57:27,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=207, Invalid=663, Unknown=0, NotChecked=0, Total=870 [2022-02-10 03:57:27,051 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 149 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:57:27,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 70 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 321 Invalid, 0 Unknown, 59 Unchecked, 0.2s Time] [2022-02-10 03:57:27,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-02-10 03:57:27,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 159. [2022-02-10 03:57:27,056 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 03:57:27,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 307 transitions. [2022-02-10 03:57:27,056 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 307 transitions. Word has length 22 [2022-02-10 03:57:27,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:57:27,056 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 307 transitions. [2022-02-10 03:57:27,057 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 03:57:27,057 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 307 transitions. [2022-02-10 03:57:27,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-10 03:57:27,057 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:57:27,057 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 03:57:27,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-10 03:57:27,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-02-10 03:57:27,260 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:57:27,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:57:27,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1394777570, now seen corresponding path program 3 times [2022-02-10 03:57:27,261 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:57:27,261 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868000661] [2022-02-10 03:57:27,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:57:27,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:57:27,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:57:27,412 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 03:57:27,413 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:57:27,413 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868000661] [2022-02-10 03:57:27,413 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868000661] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:57:27,413 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026467362] [2022-02-10 03:57:27,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:57:27,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:57:27,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:57:27,417 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 03:57:27,430 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 03:57:27,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-10 03:57:27,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:57:27,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-10 03:57:27,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:57:27,667 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 15 treesize of output 11 [2022-02-10 03:57:27,720 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 03:57:27,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:57:27,755 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:57:27,755 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 12 treesize of output 17 [2022-02-10 03:57:27,925 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 03:57:27,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026467362] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:57:27,926 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:57:27,926 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-02-10 03:57:27,926 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954563337] [2022-02-10 03:57:27,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:57:27,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-10 03:57:27,926 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:57:27,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-10 03:57:27,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-02-10 03:57:27,927 INFO L87 Difference]: Start difference. First operand 159 states and 307 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:57:28,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:57:28,121 INFO L93 Difference]: Finished difference Result 232 states and 426 transitions. [2022-02-10 03:57:28,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:57:28,121 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-10 03:57:28,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:57:28,122 INFO L225 Difference]: With dead ends: 232 [2022-02-10 03:57:28,122 INFO L226 Difference]: Without dead ends: 226 [2022-02-10 03:57:28,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:57:28,123 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 91 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:57:28,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 88 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 120 Invalid, 0 Unknown, 86 Unchecked, 0.1s Time] [2022-02-10 03:57:28,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-02-10 03:57:28,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 168. [2022-02-10 03:57:28,126 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 03:57:28,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 321 transitions. [2022-02-10 03:57:28,127 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 321 transitions. Word has length 22 [2022-02-10 03:57:28,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:57:28,127 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 321 transitions. [2022-02-10 03:57:28,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:57:28,127 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 321 transitions. [2022-02-10 03:57:28,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:57:28,127 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:57:28,127 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 03:57:28,175 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 03:57:28,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:57:28,328 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:57:28,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:57:28,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1778530228, now seen corresponding path program 4 times [2022-02-10 03:57:28,329 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:57:28,329 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27868054] [2022-02-10 03:57:28,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:57:28,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:57:28,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:57:28,393 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 03:57:28,393 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:57:28,393 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27868054] [2022-02-10 03:57:28,393 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27868054] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:57:28,393 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693656517] [2022-02-10 03:57:28,393 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:57:28,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:57:28,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:57:28,415 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 03:57:28,432 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 03:57:28,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:57:28,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:57:28,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-10 03:57:28,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:57:28,594 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 03:57:28,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:57:28,718 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 03:57:28,718 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693656517] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:57:28,718 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:57:28,718 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-02-10 03:57:28,718 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876325474] [2022-02-10 03:57:28,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:57:28,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-10 03:57:28,719 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:57:28,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-10 03:57:28,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-02-10 03:57:28,719 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 03:57:29,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:57:29,552 INFO L93 Difference]: Finished difference Result 507 states and 929 transitions. [2022-02-10 03:57:29,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-10 03:57:29,552 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 03:57:29,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:57:29,553 INFO L225 Difference]: With dead ends: 507 [2022-02-10 03:57:29,553 INFO L226 Difference]: Without dead ends: 507 [2022-02-10 03:57:29,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=492, Invalid=1488, Unknown=0, NotChecked=0, Total=1980 [2022-02-10 03:57:29,555 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 199 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:57:29,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 193 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 03:57:29,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-02-10 03:57:29,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 202. [2022-02-10 03:57:29,559 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 03:57:29,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 397 transitions. [2022-02-10 03:57:29,559 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 397 transitions. Word has length 24 [2022-02-10 03:57:29,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:57:29,559 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 397 transitions. [2022-02-10 03:57:29,559 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 03:57:29,559 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 397 transitions. [2022-02-10 03:57:29,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:57:29,560 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:57:29,560 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 03:57:29,578 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 03:57:29,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:57:29,771 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:57:29,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:57:29,772 INFO L85 PathProgramCache]: Analyzing trace with hash -2007404748, now seen corresponding path program 1 times [2022-02-10 03:57:29,772 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:57:29,772 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689854376] [2022-02-10 03:57:29,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:57:29,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:57:29,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:57:29,815 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 03:57:29,816 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:57:29,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689854376] [2022-02-10 03:57:29,816 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689854376] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:57:29,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075261119] [2022-02-10 03:57:29,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:57:29,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:57:29,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:57:29,832 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 03:57:29,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-10 03:57:29,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:57:29,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-10 03:57:29,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:57:30,014 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 03:57:30,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:57:30,073 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 03:57:30,073 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075261119] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:57:30,073 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:57:30,073 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-02-10 03:57:30,073 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344299550] [2022-02-10 03:57:30,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:57:30,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-10 03:57:30,074 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:57:30,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-10 03:57:30,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-02-10 03:57:30,074 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 03:57:30,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:57:30,238 INFO L93 Difference]: Finished difference Result 454 states and 874 transitions. [2022-02-10 03:57:30,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 03:57:30,238 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 03:57:30,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:57:30,239 INFO L225 Difference]: With dead ends: 454 [2022-02-10 03:57:30,239 INFO L226 Difference]: Without dead ends: 454 [2022-02-10 03:57:30,239 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 03:57:30,240 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 107 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:57:30,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 36 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:57:30,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-02-10 03:57:30,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 316. [2022-02-10 03:57:30,244 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 03:57:30,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 669 transitions. [2022-02-10 03:57:30,245 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 669 transitions. Word has length 24 [2022-02-10 03:57:30,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:57:30,245 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 669 transitions. [2022-02-10 03:57:30,245 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 03:57:30,245 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 669 transitions. [2022-02-10 03:57:30,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:57:30,246 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:57:30,246 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 03:57:30,275 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 03:57:30,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:57:30,446 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:57:30,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:57:30,447 INFO L85 PathProgramCache]: Analyzing trace with hash 437814964, now seen corresponding path program 5 times [2022-02-10 03:57:30,447 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:57:30,447 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911864433] [2022-02-10 03:57:30,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:57:30,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:57:30,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:57:30,484 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 03:57:30,484 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:57:30,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911864433] [2022-02-10 03:57:30,485 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911864433] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:57:30,485 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535719568] [2022-02-10 03:57:30,485 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:57:30,485 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:57:30,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:57:30,486 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 03:57:30,529 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 03:57:30,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:57:30,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-10 03:57:30,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:57:30,532 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 03:57:30,640 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 03:57:30,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:57:30,698 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 03:57:30,698 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535719568] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:57:30,698 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:57:30,698 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-02-10 03:57:30,698 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735637789] [2022-02-10 03:57:30,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:57:30,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-10 03:57:30,699 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:57:30,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-10 03:57:30,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-02-10 03:57:30,699 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 03:57:30,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:57:30,997 INFO L93 Difference]: Finished difference Result 798 states and 1650 transitions. [2022-02-10 03:57:30,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-10 03:57:30,998 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 03:57:30,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:57:30,999 INFO L225 Difference]: With dead ends: 798 [2022-02-10 03:57:30,999 INFO L226 Difference]: Without dead ends: 791 [2022-02-10 03:57:31,000 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 03:57:31,000 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 244 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:57:31,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 115 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:57:31,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-02-10 03:57:31,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 541. [2022-02-10 03:57:31,008 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 03:57:31,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 1201 transitions. [2022-02-10 03:57:31,009 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 1201 transitions. Word has length 24 [2022-02-10 03:57:31,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:57:31,009 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 1201 transitions. [2022-02-10 03:57:31,009 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 03:57:31,009 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 1201 transitions. [2022-02-10 03:57:31,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:57:31,010 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:57:31,010 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 03:57:31,051 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 03:57:31,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:57:31,232 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:57:31,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:57:31,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1364786488, now seen corresponding path program 2 times [2022-02-10 03:57:31,232 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:57:31,232 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541618226] [2022-02-10 03:57:31,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:57:31,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:57:31,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:57:31,263 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 03:57:31,263 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:57:31,263 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541618226] [2022-02-10 03:57:31,263 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541618226] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:57:31,263 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527899065] [2022-02-10 03:57:31,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:57:31,264 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:57:31,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:57:31,264 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 03:57:31,265 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 03:57:31,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:57:31,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:57:31,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-10 03:57:31,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:57:31,362 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 03:57:31,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:57:31,430 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 03:57:31,430 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527899065] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:57:31,430 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:57:31,430 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-02-10 03:57:31,430 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753094669] [2022-02-10 03:57:31,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:57:31,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-10 03:57:31,431 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:57:31,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-10 03:57:31,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-02-10 03:57:31,431 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 03:57:31,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:57:31,635 INFO L93 Difference]: Finished difference Result 920 states and 1841 transitions. [2022-02-10 03:57:31,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-10 03:57:31,635 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 03:57:31,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:57:31,637 INFO L225 Difference]: With dead ends: 920 [2022-02-10 03:57:31,637 INFO L226 Difference]: Without dead ends: 920 [2022-02-10 03:57:31,637 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 03:57:31,638 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 136 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:57:31,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 71 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:57:31,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2022-02-10 03:57:31,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 579. [2022-02-10 03:57:31,651 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 03:57:31,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 1257 transitions. [2022-02-10 03:57:31,652 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 1257 transitions. Word has length 24 [2022-02-10 03:57:31,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:57:31,654 INFO L470 AbstractCegarLoop]: Abstraction has 579 states and 1257 transitions. [2022-02-10 03:57:31,654 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 03:57:31,654 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 1257 transitions. [2022-02-10 03:57:31,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:57:31,655 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:57:31,656 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 03:57:31,694 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 03:57:31,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:57:31,878 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:57:31,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:57:31,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1520202116, now seen corresponding path program 6 times [2022-02-10 03:57:31,879 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:57:31,879 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466946178] [2022-02-10 03:57:31,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:57:31,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:57:31,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:57:31,922 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 03:57:31,922 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:57:31,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466946178] [2022-02-10 03:57:31,922 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466946178] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:57:31,923 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220054322] [2022-02-10 03:57:31,923 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:57:31,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:57:31,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:57:31,924 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 03:57:31,938 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 03:57:31,957 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-10 03:57:31,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:57:31,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-10 03:57:31,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:57:32,088 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 03:57:32,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:57:32,166 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 03:57:32,166 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220054322] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:57:32,166 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:57:32,166 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-02-10 03:57:32,166 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735572939] [2022-02-10 03:57:32,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:57:32,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-10 03:57:32,166 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:57:32,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-10 03:57:32,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-02-10 03:57:32,167 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 03:57:32,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:57:32,591 INFO L93 Difference]: Finished difference Result 1166 states and 2392 transitions. [2022-02-10 03:57:32,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-10 03:57:32,591 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 03:57:32,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:57:32,593 INFO L225 Difference]: With dead ends: 1166 [2022-02-10 03:57:32,593 INFO L226 Difference]: Without dead ends: 1166 [2022-02-10 03:57:32,594 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 03:57:32,594 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 161 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:57:32,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 112 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:57:32,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1166 states. [2022-02-10 03:57:32,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1166 to 584. [2022-02-10 03:57:32,604 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 03:57:32,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 1266 transitions. [2022-02-10 03:57:32,605 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 1266 transitions. Word has length 24 [2022-02-10 03:57:32,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:57:32,605 INFO L470 AbstractCegarLoop]: Abstraction has 584 states and 1266 transitions. [2022-02-10 03:57:32,605 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 03:57:32,605 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 1266 transitions. [2022-02-10 03:57:32,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:57:32,606 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:57:32,606 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 03:57:32,622 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-02-10 03:57:32,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-02-10 03:57:32,823 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:57:32,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:57:32,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1873818808, now seen corresponding path program 7 times [2022-02-10 03:57:32,823 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:57:32,823 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776909817] [2022-02-10 03:57:32,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:57:32,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:57:32,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:57:32,856 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 03:57:32,856 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:57:32,856 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776909817] [2022-02-10 03:57:32,856 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776909817] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:57:32,857 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087517736] [2022-02-10 03:57:32,857 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:57:32,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:57:32,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:57:32,858 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 03:57:32,858 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 03:57:32,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:57:32,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-10 03:57:32,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:57:32,983 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 03:57:32,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:57:33,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:57:33,035 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087517736] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:57:33,035 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:57:33,035 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-02-10 03:57:33,036 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788575381] [2022-02-10 03:57:33,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:57:33,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-10 03:57:33,036 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:57:33,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-10 03:57:33,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-02-10 03:57:33,037 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 03:57:33,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:57:33,304 INFO L93 Difference]: Finished difference Result 1141 states and 2328 transitions. [2022-02-10 03:57:33,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-10 03:57:33,305 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 03:57:33,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:57:33,307 INFO L225 Difference]: With dead ends: 1141 [2022-02-10 03:57:33,307 INFO L226 Difference]: Without dead ends: 1141 [2022-02-10 03:57:33,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=219, Invalid=537, Unknown=0, NotChecked=0, Total=756 [2022-02-10 03:57:33,308 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 205 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:57:33,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 117 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:57:33,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1141 states. [2022-02-10 03:57:33,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1141 to 821. [2022-02-10 03:57:33,319 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 03:57:33,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1855 transitions. [2022-02-10 03:57:33,320 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1855 transitions. Word has length 24 [2022-02-10 03:57:33,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:57:33,320 INFO L470 AbstractCegarLoop]: Abstraction has 821 states and 1855 transitions. [2022-02-10 03:57:33,320 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 03:57:33,320 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1855 transitions. [2022-02-10 03:57:33,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:57:33,323 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:57:33,323 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 03:57:33,342 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 03:57:33,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:57:33,540 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:57:33,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:57:33,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1749610500, now seen corresponding path program 8 times [2022-02-10 03:57:33,540 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:57:33,540 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811957243] [2022-02-10 03:57:33,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:57:33,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:57:33,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:57:33,578 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 03:57:33,579 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:57:33,579 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811957243] [2022-02-10 03:57:33,579 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811957243] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:57:33,579 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928728806] [2022-02-10 03:57:33,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:57:33,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:57:33,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:57:33,580 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 03:57:33,593 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 03:57:33,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:57:33,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:57:33,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-10 03:57:33,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:57:33,662 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 03:57:33,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:57:33,737 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 03:57:33,738 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928728806] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:57:33,738 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:57:33,738 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-02-10 03:57:33,738 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604219622] [2022-02-10 03:57:33,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:57:33,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-10 03:57:33,738 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:57:33,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-10 03:57:33,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-02-10 03:57:33,739 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 03:57:34,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:57:34,131 INFO L93 Difference]: Finished difference Result 1523 states and 3273 transitions. [2022-02-10 03:57:34,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-10 03:57:34,132 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 03:57:34,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:57:34,134 INFO L225 Difference]: With dead ends: 1523 [2022-02-10 03:57:34,134 INFO L226 Difference]: Without dead ends: 1522 [2022-02-10 03:57:34,135 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 03:57:34,135 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 168 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:57:34,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 131 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 03:57:34,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1522 states. [2022-02-10 03:57:34,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1522 to 854. [2022-02-10 03:57:34,152 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 03:57:34,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 1916 transitions. [2022-02-10 03:57:34,153 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 1916 transitions. Word has length 24 [2022-02-10 03:57:34,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:57:34,153 INFO L470 AbstractCegarLoop]: Abstraction has 854 states and 1916 transitions. [2022-02-10 03:57:34,154 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 03:57:34,154 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 1916 transitions. [2022-02-10 03:57:34,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:57:34,155 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:57:34,155 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 03:57:34,171 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 03:57:34,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-02-10 03:57:34,371 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:57:34,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:57:34,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1212838136, now seen corresponding path program 3 times [2022-02-10 03:57:34,372 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:57:34,372 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734955859] [2022-02-10 03:57:34,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:57:34,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:57:34,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:57:34,413 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 03:57:34,413 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:57:34,413 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734955859] [2022-02-10 03:57:34,413 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734955859] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:57:34,413 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118909705] [2022-02-10 03:57:34,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:57:34,414 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:57:34,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:57:34,415 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 03:57:34,416 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 03:57:34,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-10 03:57:34,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:57:34,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-10 03:57:34,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:57:34,490 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 03:57:34,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:57:34,554 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 03:57:34,554 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118909705] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:57:34,554 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:57:34,554 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 9 [2022-02-10 03:57:34,554 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366318891] [2022-02-10 03:57:34,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:57:34,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-10 03:57:34,554 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:57:34,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-10 03:57:34,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-02-10 03:57:34,555 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 03:57:34,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:57:34,656 INFO L93 Difference]: Finished difference Result 1018 states and 2194 transitions. [2022-02-10 03:57:34,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:57:34,656 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 03:57:34,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:57:34,658 INFO L225 Difference]: With dead ends: 1018 [2022-02-10 03:57:34,658 INFO L226 Difference]: Without dead ends: 1018 [2022-02-10 03:57:34,658 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 03:57:34,658 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 94 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:57:34,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 42 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:57:34,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2022-02-10 03:57:34,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 835. [2022-02-10 03:57:34,668 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 03:57:34,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 1881 transitions. [2022-02-10 03:57:34,669 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 1881 transitions. Word has length 24 [2022-02-10 03:57:34,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:57:34,669 INFO L470 AbstractCegarLoop]: Abstraction has 835 states and 1881 transitions. [2022-02-10 03:57:34,669 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 03:57:34,669 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 1881 transitions. [2022-02-10 03:57:34,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:57:34,671 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:57:34,671 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 03:57:34,703 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 03:57:34,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-02-10 03:57:34,890 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:57:34,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:57:34,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1763307140, now seen corresponding path program 9 times [2022-02-10 03:57:34,891 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:57:34,891 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492737288] [2022-02-10 03:57:34,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:57:34,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:57:34,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:57:34,926 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 03:57:34,926 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:57:34,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492737288] [2022-02-10 03:57:34,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492737288] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:57:34,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984288223] [2022-02-10 03:57:34,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:57:34,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:57:34,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:57:34,927 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 03:57:34,928 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 03:57:34,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:57:34,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:57:34,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-10 03:57:34,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:57:35,017 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 03:57:35,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:57:35,088 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 03:57:35,088 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984288223] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:57:35,088 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:57:35,088 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-02-10 03:57:35,088 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293522914] [2022-02-10 03:57:35,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:57:35,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-10 03:57:35,089 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:57:35,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-10 03:57:35,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-02-10 03:57:35,089 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 03:57:35,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:57:35,402 INFO L93 Difference]: Finished difference Result 1257 states and 2700 transitions. [2022-02-10 03:57:35,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-10 03:57:35,402 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 03:57:35,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:57:35,404 INFO L225 Difference]: With dead ends: 1257 [2022-02-10 03:57:35,404 INFO L226 Difference]: Without dead ends: 1257 [2022-02-10 03:57:35,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=599, Unknown=0, NotChecked=0, Total=812 [2022-02-10 03:57:35,405 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 161 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:57:35,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 98 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:57:35,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1257 states. [2022-02-10 03:57:35,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1257 to 891. [2022-02-10 03:57:35,417 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 03:57:35,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 2004 transitions. [2022-02-10 03:57:35,419 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 2004 transitions. Word has length 24 [2022-02-10 03:57:35,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:57:35,419 INFO L470 AbstractCegarLoop]: Abstraction has 891 states and 2004 transitions. [2022-02-10 03:57:35,419 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 03:57:35,419 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 2004 transitions. [2022-02-10 03:57:35,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:57:35,420 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:57:35,420 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 03:57:35,440 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 03:57:35,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-02-10 03:57:35,632 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:57:35,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:57:35,633 INFO L85 PathProgramCache]: Analyzing trace with hash 85686396, now seen corresponding path program 10 times [2022-02-10 03:57:35,633 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:57:35,633 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623765721] [2022-02-10 03:57:35,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:57:35,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:57:35,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:57:35,686 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 03:57:35,686 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:57:35,686 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623765721] [2022-02-10 03:57:35,686 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623765721] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:57:35,686 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317694932] [2022-02-10 03:57:35,686 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:57:35,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:57:35,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:57:35,687 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 03:57:35,688 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 03:57:35,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:57:35,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:57:35,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-10 03:57:35,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:57:35,807 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 03:57:35,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:57:35,859 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 03:57:35,859 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317694932] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:57:35,859 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:57:35,859 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2022-02-10 03:57:35,859 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637140022] [2022-02-10 03:57:35,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:57:35,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-10 03:57:35,860 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:57:35,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-10 03:57:35,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-02-10 03:57:35,860 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 03:57:36,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:57:36,060 INFO L93 Difference]: Finished difference Result 1151 states and 2521 transitions. [2022-02-10 03:57:36,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-10 03:57:36,060 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 03:57:36,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:57:36,062 INFO L225 Difference]: With dead ends: 1151 [2022-02-10 03:57:36,062 INFO L226 Difference]: Without dead ends: 1149 [2022-02-10 03:57:36,062 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 03:57:36,063 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 133 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:57:36,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 102 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:57:36,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2022-02-10 03:57:36,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 1019. [2022-02-10 03:57:36,073 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 03:57:36,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 2327 transitions. [2022-02-10 03:57:36,074 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 2327 transitions. Word has length 24 [2022-02-10 03:57:36,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:57:36,074 INFO L470 AbstractCegarLoop]: Abstraction has 1019 states and 2327 transitions. [2022-02-10 03:57:36,074 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 03:57:36,074 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 2327 transitions. [2022-02-10 03:57:36,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:57:36,076 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:57:36,076 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 03:57:36,094 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 03:57:36,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-02-10 03:57:36,291 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:57:36,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:57:36,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1903831492, now seen corresponding path program 11 times [2022-02-10 03:57:36,292 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:57:36,292 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226375790] [2022-02-10 03:57:36,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:57:36,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:57:36,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:57:36,342 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 03:57:36,343 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:57:36,343 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226375790] [2022-02-10 03:57:36,343 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226375790] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:57:36,343 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444419816] [2022-02-10 03:57:36,343 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:57:36,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:57:36,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:57:36,344 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 03:57:36,367 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 03:57:36,379 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 03:57:36,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:57:36,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-10 03:57:36,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:57:36,431 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 03:57:36,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:57:36,492 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 03:57:36,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444419816] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:57:36,492 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:57:36,492 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-02-10 03:57:36,492 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313759755] [2022-02-10 03:57:36,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:57:36,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-10 03:57:36,493 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:57:36,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-10 03:57:36,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-02-10 03:57:36,493 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 03:57:36,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:57:36,717 INFO L93 Difference]: Finished difference Result 1424 states and 3124 transitions. [2022-02-10 03:57:36,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-10 03:57:36,717 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 03:57:36,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:57:36,720 INFO L225 Difference]: With dead ends: 1424 [2022-02-10 03:57:36,720 INFO L226 Difference]: Without dead ends: 1423 [2022-02-10 03:57:36,720 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 03:57:36,720 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 129 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:57:36,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 95 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:57:36,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2022-02-10 03:57:36,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 1019. [2022-02-10 03:57:36,737 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 03:57:36,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 2326 transitions. [2022-02-10 03:57:36,739 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 2326 transitions. Word has length 24 [2022-02-10 03:57:36,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:57:36,739 INFO L470 AbstractCegarLoop]: Abstraction has 1019 states and 2326 transitions. [2022-02-10 03:57:36,739 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 03:57:36,739 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 2326 transitions. [2022-02-10 03:57:36,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:57:36,741 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:57:36,741 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 03:57:36,757 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 03:57:36,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:57:36,956 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:57:36,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:57:36,956 INFO L85 PathProgramCache]: Analyzing trace with hash -369242560, now seen corresponding path program 12 times [2022-02-10 03:57:36,956 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:57:36,956 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268769362] [2022-02-10 03:57:36,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:57:36,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:57:36,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:57:36,997 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 03:57:36,998 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:57:36,998 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268769362] [2022-02-10 03:57:36,998 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268769362] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:57:36,998 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814586328] [2022-02-10 03:57:36,998 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:57:36,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:57:36,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:57:37,000 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 03:57:37,001 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 03:57:37,022 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 03:57:37,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:57:37,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-10 03:57:37,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:57:37,077 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 03:57:37,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:57:37,126 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 03:57:37,126 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814586328] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:57:37,126 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:57:37,127 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-02-10 03:57:37,127 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661550777] [2022-02-10 03:57:37,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:57:37,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-10 03:57:37,127 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:57:37,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-10 03:57:37,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-02-10 03:57:37,127 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 03:57:37,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:57:37,383 INFO L93 Difference]: Finished difference Result 1430 states and 3155 transitions. [2022-02-10 03:57:37,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-10 03:57:37,384 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 03:57:37,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:57:37,386 INFO L225 Difference]: With dead ends: 1430 [2022-02-10 03:57:37,386 INFO L226 Difference]: Without dead ends: 1430 [2022-02-10 03:57:37,387 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 03:57:37,388 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 104 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:57:37,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 120 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:57:37,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1430 states. [2022-02-10 03:57:37,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1430 to 1042. [2022-02-10 03:57:37,403 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 03:57:37,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1042 states to 1042 states and 2374 transitions. [2022-02-10 03:57:37,405 INFO L78 Accepts]: Start accepts. Automaton has 1042 states and 2374 transitions. Word has length 24 [2022-02-10 03:57:37,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:57:37,405 INFO L470 AbstractCegarLoop]: Abstraction has 1042 states and 2374 transitions. [2022-02-10 03:57:37,405 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 03:57:37,405 INFO L276 IsEmpty]: Start isEmpty. Operand 1042 states and 2374 transitions. [2022-02-10 03:57:37,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-10 03:57:37,406 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:57:37,406 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 03:57:37,437 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 03:57:37,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-02-10 03:57:37,623 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:57:37,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:57:37,624 INFO L85 PathProgramCache]: Analyzing trace with hash -715193216, now seen corresponding path program 13 times [2022-02-10 03:57:37,624 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:57:37,624 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588020032] [2022-02-10 03:57:37,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:57:37,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:57:37,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:57:37,701 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 03:57:37,702 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:57:37,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588020032] [2022-02-10 03:57:37,702 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588020032] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:57:37,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538884000] [2022-02-10 03:57:37,702 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:57:37,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:57:37,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:57:37,703 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 03:57:37,705 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 03:57:37,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:57:37,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-10 03:57:37,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:57:37,785 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 03:57:37,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:57:37,839 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 03:57:37,839 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538884000] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:57:37,839 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:57:37,839 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2022-02-10 03:57:37,839 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603222467] [2022-02-10 03:57:37,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:57:37,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-10 03:57:37,839 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:57:37,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-10 03:57:37,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-02-10 03:57:37,840 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 03:57:38,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:57:38,076 INFO L93 Difference]: Finished difference Result 1445 states and 3168 transitions. [2022-02-10 03:57:38,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-10 03:57:38,076 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 03:57:38,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:57:38,079 INFO L225 Difference]: With dead ends: 1445 [2022-02-10 03:57:38,079 INFO L226 Difference]: Without dead ends: 1442 [2022-02-10 03:57:38,079 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 03:57:38,079 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 156 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:57:38,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 95 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:57:38,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1442 states. [2022-02-10 03:57:38,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1442 to 1045. [2022-02-10 03:57:38,092 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 03:57:38,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 2377 transitions. [2022-02-10 03:57:38,093 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 2377 transitions. Word has length 24 [2022-02-10 03:57:38,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:57:38,094 INFO L470 AbstractCegarLoop]: Abstraction has 1045 states and 2377 transitions. [2022-02-10 03:57:38,094 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 03:57:38,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 2377 transitions. [2022-02-10 03:57:38,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:57:38,095 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:57:38,095 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 03:57:38,125 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 03:57:38,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-02-10 03:57:38,307 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:57:38,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:57:38,307 INFO L85 PathProgramCache]: Analyzing trace with hash 2057447698, now seen corresponding path program 4 times [2022-02-10 03:57:38,307 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:57:38,307 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200144096] [2022-02-10 03:57:38,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:57:38,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:57:38,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:57:38,542 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 03:57:38,542 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:57:38,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200144096] [2022-02-10 03:57:38,543 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200144096] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:57:38,543 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199668076] [2022-02-10 03:57:38,543 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:57:38,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:57:38,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:57:38,544 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 03:57:38,560 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 03:57:38,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:57:38,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:57:38,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-10 03:57:38,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:57:38,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:57:38,903 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:57:38,904 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 24 treesize of output 16 [2022-02-10 03:57:38,936 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 03:57:38,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:57:39,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:57:39,111 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:57:39,112 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 21 treesize of output 56 [2022-02-10 03:57:39,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:57:39,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:57:39,340 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:57:39,340 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 20 treesize of output 47 [2022-02-10 03:57:39,583 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 03:57:39,584 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199668076] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:57:39,584 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:57:39,584 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-10 03:57:39,584 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655862641] [2022-02-10 03:57:39,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:57:39,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:57:39,584 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:57:39,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:57:39,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:57:39,585 INFO L87 Difference]: Start difference. First operand 1045 states and 2377 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 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 03:57:41,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:57:41,620 INFO L93 Difference]: Finished difference Result 1696 states and 3597 transitions. [2022-02-10 03:57:41,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-10 03:57:41,621 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 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 03:57:41,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:57:41,624 INFO L225 Difference]: With dead ends: 1696 [2022-02-10 03:57:41,624 INFO L226 Difference]: Without dead ends: 1691 [2022-02-10 03:57:41,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1111 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=721, Invalid=2939, Unknown=0, NotChecked=0, Total=3660 [2022-02-10 03:57:41,626 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 288 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-10 03:57:41,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 138 Invalid, 843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-10 03:57:41,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1691 states. [2022-02-10 03:57:41,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1691 to 1085. [2022-02-10 03:57:41,643 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 03:57:41,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1085 states to 1085 states and 2485 transitions. [2022-02-10 03:57:41,645 INFO L78 Accepts]: Start accepts. Automaton has 1085 states and 2485 transitions. Word has length 26 [2022-02-10 03:57:41,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:57:41,645 INFO L470 AbstractCegarLoop]: Abstraction has 1085 states and 2485 transitions. [2022-02-10 03:57:41,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 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 03:57:41,645 INFO L276 IsEmpty]: Start isEmpty. Operand 1085 states and 2485 transitions. [2022-02-10 03:57:41,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:57:41,647 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:57:41,647 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 03:57:41,679 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-02-10 03:57:41,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:57:41,864 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:57:41,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:57:41,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1983730474, now seen corresponding path program 5 times [2022-02-10 03:57:41,865 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:57:41,865 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625706296] [2022-02-10 03:57:41,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:57:41,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:57:41,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:57:42,177 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 03:57:42,178 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:57:42,178 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625706296] [2022-02-10 03:57:42,178 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625706296] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:57:42,178 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853762262] [2022-02-10 03:57:42,178 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:57:42,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:57:42,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:57:42,179 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 03:57:42,179 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 03:57:42,201 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 03:57:42,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:57:42,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-10 03:57:42,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:57:42,560 INFO L353 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2022-02-10 03:57:42,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 47 [2022-02-10 03:57:42,605 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 03:57:42,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:57:42,834 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:57:42,834 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 38 treesize of output 71 [2022-02-10 03:57:43,503 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 03:57:43,503 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853762262] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:57:43,503 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:57:43,503 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-10 03:57:43,504 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156068119] [2022-02-10 03:57:43,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:57:43,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-10 03:57:43,504 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:57:43,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-10 03:57:43,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2022-02-10 03:57:43,505 INFO L87 Difference]: Start difference. First operand 1085 states and 2485 transitions. Second operand has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:57:45,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:57:45,283 INFO L93 Difference]: Finished difference Result 2274 states and 5218 transitions. [2022-02-10 03:57:45,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-10 03:57:45,284 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:57:45,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:57:45,288 INFO L225 Difference]: With dead ends: 2274 [2022-02-10 03:57:45,288 INFO L226 Difference]: Without dead ends: 2269 [2022-02-10 03:57:45,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1151 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=561, Invalid=3221, Unknown=0, NotChecked=0, Total=3782 [2022-02-10 03:57:45,290 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 232 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 269 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:57:45,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 128 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 483 Invalid, 0 Unknown, 269 Unchecked, 0.3s Time] [2022-02-10 03:57:45,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2269 states. [2022-02-10 03:57:45,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2269 to 1097. [2022-02-10 03:57:45,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1097 states, 1096 states have (on average 2.291970802919708) internal successors, (2512), 1096 states have internal predecessors, (2512), 0 states have call successors, (0), 0 states 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 03:57:45,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 2512 transitions. [2022-02-10 03:57:45,308 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 2512 transitions. Word has length 26 [2022-02-10 03:57:45,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:57:45,309 INFO L470 AbstractCegarLoop]: Abstraction has 1097 states and 2512 transitions. [2022-02-10 03:57:45,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:57:45,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 2512 transitions. [2022-02-10 03:57:45,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:57:45,310 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:57:45,310 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 03:57:45,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-02-10 03:57:45,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:57:45,526 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:57:45,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:57:45,526 INFO L85 PathProgramCache]: Analyzing trace with hash 207700114, now seen corresponding path program 14 times [2022-02-10 03:57:45,527 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:57:45,527 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985547679] [2022-02-10 03:57:45,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:57:45,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:57:45,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:57:45,889 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 03:57:45,889 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:57:45,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985547679] [2022-02-10 03:57:45,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985547679] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:57:45,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419777846] [2022-02-10 03:57:45,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:57:45,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:57:45,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:57:45,891 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 03:57:45,894 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 03:57:45,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:57:45,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:57:45,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-10 03:57:45,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:57:46,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:57:46,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:57:46,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:57:46,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:57:46,277 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 29 treesize of output 17 [2022-02-10 03:57:46,317 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 03:57:46,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:57:46,457 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-10 03:57:46,457 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 22 treesize of output 47 [2022-02-10 03:57:46,598 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 03:57:46,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419777846] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:57:46,599 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:57:46,599 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-02-10 03:57:46,599 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139355431] [2022-02-10 03:57:46,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:57:46,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:57:46,599 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:57:46,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:57:46,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:57:46,600 INFO L87 Difference]: Start difference. First operand 1097 states and 2512 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 03:57:48,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:57:48,984 INFO L93 Difference]: Finished difference Result 1711 states and 3776 transitions. [2022-02-10 03:57:48,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-10 03:57:48,984 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 03:57:48,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:57:48,988 INFO L225 Difference]: With dead ends: 1711 [2022-02-10 03:57:48,988 INFO L226 Difference]: Without dead ends: 1699 [2022-02-10 03:57:48,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1569 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=784, Invalid=4328, Unknown=0, NotChecked=0, Total=5112 [2022-02-10 03:57:48,990 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 242 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 1025 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 1120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-10 03:57:48,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 225 Invalid, 1120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1025 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-10 03:57:48,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1699 states. [2022-02-10 03:57:49,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1699 to 1115. [2022-02-10 03:57:49,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1115 states, 1114 states have (on average 2.279174147217235) internal successors, (2539), 1114 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 03:57:49,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1115 states to 1115 states and 2539 transitions. [2022-02-10 03:57:49,007 INFO L78 Accepts]: Start accepts. Automaton has 1115 states and 2539 transitions. Word has length 26 [2022-02-10 03:57:49,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:57:49,007 INFO L470 AbstractCegarLoop]: Abstraction has 1115 states and 2539 transitions. [2022-02-10 03:57:49,007 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 03:57:49,007 INFO L276 IsEmpty]: Start isEmpty. Operand 1115 states and 2539 transitions. [2022-02-10 03:57:49,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:57:49,010 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:57:49,010 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 03:57:49,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-02-10 03:57:49,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:57:49,223 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:57:49,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:57:49,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1134671638, now seen corresponding path program 6 times [2022-02-10 03:57:49,224 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:57:49,224 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176493173] [2022-02-10 03:57:49,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:57:49,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:57:49,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:57:49,425 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 03:57:49,426 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:57:49,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176493173] [2022-02-10 03:57:49,426 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176493173] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:57:49,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805770025] [2022-02-10 03:57:49,426 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:57:49,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:57:49,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:57:49,427 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 03:57:49,427 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 03:57:49,450 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 03:57:49,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:57:49,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-10 03:57:49,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:57:49,801 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:57:49,802 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 22 treesize of output 30 [2022-02-10 03:57:49,922 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 03:57:49,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:57:50,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:57:50,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:57:50,207 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:57:50,207 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 21 treesize of output 48 [2022-02-10 03:57:50,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:57:50,273 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 20 treesize of output 5 [2022-02-10 03:57:50,485 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 03:57:50,485 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805770025] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:57:50,485 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:57:50,485 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 28 [2022-02-10 03:57:50,485 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923938298] [2022-02-10 03:57:50,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:57:50,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-10 03:57:50,485 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:57:50,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-10 03:57:50,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2022-02-10 03:57:50,486 INFO L87 Difference]: Start difference. First operand 1115 states and 2539 transitions. Second operand has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 28 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 03:57:55,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:57:55,178 INFO L93 Difference]: Finished difference Result 1775 states and 3751 transitions. [2022-02-10 03:57:55,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-10 03:57:55,179 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 28 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 03:57:55,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:57:55,182 INFO L225 Difference]: With dead ends: 1775 [2022-02-10 03:57:55,182 INFO L226 Difference]: Without dead ends: 1754 [2022-02-10 03:57:55,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2060 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1066, Invalid=6074, Unknown=0, NotChecked=0, Total=7140 [2022-02-10 03:57:55,184 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 367 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 1680 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 1756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-10 03:57:55,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 305 Invalid, 1756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1680 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-10 03:57:55,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1754 states. [2022-02-10 03:57:55,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1754 to 1124. [2022-02-10 03:57:55,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1124 states, 1123 states have (on average 2.2751558325912735) internal successors, (2555), 1123 states have internal predecessors, (2555), 0 states have call successors, (0), 0 states 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 03:57:55,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 2555 transitions. [2022-02-10 03:57:55,208 INFO L78 Accepts]: Start accepts. Automaton has 1124 states and 2555 transitions. Word has length 26 [2022-02-10 03:57:55,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:57:55,208 INFO L470 AbstractCegarLoop]: Abstraction has 1124 states and 2555 transitions. [2022-02-10 03:57:55,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 28 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 03:57:55,208 INFO L276 IsEmpty]: Start isEmpty. Operand 1124 states and 2555 transitions. [2022-02-10 03:57:55,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:57:55,210 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:57:55,210 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 03:57:55,238 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 03:57:55,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-02-10 03:57:55,423 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:57:55,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:57:55,424 INFO L85 PathProgramCache]: Analyzing trace with hash 245927254, now seen corresponding path program 7 times [2022-02-10 03:57:55,424 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:57:55,424 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979700412] [2022-02-10 03:57:55,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:57:55,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:57:55,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:57:55,716 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 03:57:55,716 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:57:55,716 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979700412] [2022-02-10 03:57:55,716 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979700412] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:57:55,716 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427107597] [2022-02-10 03:57:55,716 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:57:55,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:57:55,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:57:55,718 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 03:57:55,719 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 03:57:55,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:57:55,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-10 03:57:55,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:57:56,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:57:56,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:57:56,149 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 24 treesize of output 16 [2022-02-10 03:57:56,193 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 03:57:56,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:57:56,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:57:56,431 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:57:56,431 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 21 treesize of output 56 [2022-02-10 03:57:56,591 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:57:56,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:57:56,606 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:57:56,606 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 20 treesize of output 47 [2022-02-10 03:57:56,861 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 03:57:56,861 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427107597] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:57:56,862 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:57:56,862 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-10 03:57:56,862 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117110866] [2022-02-10 03:57:56,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:57:56,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:57:56,862 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:57:56,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:57:56,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:57:56,863 INFO L87 Difference]: Start difference. First operand 1124 states and 2555 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 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 03:57:58,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:57:58,754 INFO L93 Difference]: Finished difference Result 1767 states and 3716 transitions. [2022-02-10 03:57:58,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-10 03:57:58,755 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 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 03:57:58,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:57:58,758 INFO L225 Difference]: With dead ends: 1767 [2022-02-10 03:57:58,758 INFO L226 Difference]: Without dead ends: 1762 [2022-02-10 03:57:58,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=710, Invalid=2950, Unknown=0, NotChecked=0, Total=3660 [2022-02-10 03:57:58,759 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 334 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 990 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 1186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-10 03:57:58,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 237 Invalid, 1186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 990 Invalid, 0 Unknown, 71 Unchecked, 0.5s Time] [2022-02-10 03:57:58,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1762 states. [2022-02-10 03:57:58,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1762 to 1130. [2022-02-10 03:57:58,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1130 states, 1129 states have (on average 2.274579273693534) internal successors, (2568), 1129 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states 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 03:57:58,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1130 states to 1130 states and 2568 transitions. [2022-02-10 03:57:58,779 INFO L78 Accepts]: Start accepts. Automaton has 1130 states and 2568 transitions. Word has length 26 [2022-02-10 03:57:58,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:57:58,780 INFO L470 AbstractCegarLoop]: Abstraction has 1130 states and 2568 transitions. [2022-02-10 03:57:58,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 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 03:57:58,780 INFO L276 IsEmpty]: Start isEmpty. Operand 1130 states and 2568 transitions. [2022-02-10 03:57:58,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:57:58,781 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:57:58,781 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 03:57:58,800 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 03:57:58,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-02-10 03:57:58,987 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:57:58,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:57:58,988 INFO L85 PathProgramCache]: Analyzing trace with hash 948958874, now seen corresponding path program 8 times [2022-02-10 03:57:58,988 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:57:58,988 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537713014] [2022-02-10 03:57:58,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:57:58,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:57:58,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:57:59,232 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 03:57:59,232 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:57:59,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537713014] [2022-02-10 03:57:59,232 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537713014] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:57:59,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807857504] [2022-02-10 03:57:59,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:57:59,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:57:59,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:57:59,234 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 03:57:59,235 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 03:57:59,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:57:59,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:57:59,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-10 03:57:59,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:57:59,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:57:59,631 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:57:59,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2022-02-10 03:57:59,887 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 03:57:59,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:58:00,183 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:58:00,183 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 38 treesize of output 71 [2022-02-10 03:58:01,800 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 03:58:01,800 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807857504] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:58:01,800 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:58:01,800 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 26 [2022-02-10 03:58:01,802 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066064477] [2022-02-10 03:58:01,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:58:01,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-10 03:58:01,803 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:58:01,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-10 03:58:01,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:58:01,803 INFO L87 Difference]: Start difference. First operand 1130 states and 2568 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 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 03:58:05,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:58:05,763 INFO L93 Difference]: Finished difference Result 2158 states and 4686 transitions. [2022-02-10 03:58:05,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-10 03:58:05,763 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 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 03:58:05,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:58:05,767 INFO L225 Difference]: With dead ends: 2158 [2022-02-10 03:58:05,767 INFO L226 Difference]: Without dead ends: 2152 [2022-02-10 03:58:05,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2179 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1159, Invalid=5321, Unknown=0, NotChecked=0, Total=6480 [2022-02-10 03:58:05,768 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 287 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 1251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 438 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-10 03:58:05,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 204 Invalid, 1251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 714 Invalid, 0 Unknown, 438 Unchecked, 0.4s Time] [2022-02-10 03:58:05,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2022-02-10 03:58:05,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 1135. [2022-02-10 03:58:05,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1135 states, 1134 states have (on average 2.2742504409171076) internal successors, (2579), 1134 states have internal predecessors, (2579), 0 states have call successors, (0), 0 states 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 03:58:05,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 2579 transitions. [2022-02-10 03:58:05,786 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 2579 transitions. Word has length 26 [2022-02-10 03:58:05,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:58:05,786 INFO L470 AbstractCegarLoop]: Abstraction has 1135 states and 2579 transitions. [2022-02-10 03:58:05,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 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 03:58:05,786 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 2579 transitions. [2022-02-10 03:58:05,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:58:05,787 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:58:05,788 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 03:58:05,803 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 03:58:05,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:58:05,988 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:58:05,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:58:05,988 INFO L85 PathProgramCache]: Analyzing trace with hash 982723286, now seen corresponding path program 9 times [2022-02-10 03:58:05,988 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:58:05,989 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130153944] [2022-02-10 03:58:05,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:58:05,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:58:05,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:58:06,188 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 03:58:06,188 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:58:06,188 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130153944] [2022-02-10 03:58:06,188 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130153944] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:58:06,188 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655037155] [2022-02-10 03:58:06,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:58:06,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:58:06,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:58:06,190 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 03:58:06,190 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 03:58:06,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:58:06,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:58:06,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-10 03:58:06,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:58:06,516 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:58:06,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2022-02-10 03:58:06,772 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 03:58:06,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:58:07,032 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:58:07,033 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 38 treesize of output 71 [2022-02-10 03:58:07,948 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 03:58:07,949 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655037155] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:58:07,949 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:58:07,949 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 26 [2022-02-10 03:58:07,949 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348381253] [2022-02-10 03:58:07,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:58:07,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-10 03:58:07,949 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:58:07,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-10 03:58:07,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:58:07,950 INFO L87 Difference]: Start difference. First operand 1135 states and 2579 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:58:09,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:58:09,301 INFO L93 Difference]: Finished difference Result 1437 states and 3157 transitions. [2022-02-10 03:58:09,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-10 03:58:09,302 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:58:09,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:58:09,303 INFO L225 Difference]: With dead ends: 1437 [2022-02-10 03:58:09,304 INFO L226 Difference]: Without dead ends: 1427 [2022-02-10 03:58:09,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=443, Invalid=2209, Unknown=0, NotChecked=0, Total=2652 [2022-02-10 03:58:09,305 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 214 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 266 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:58:09,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 198 Invalid, 964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 649 Invalid, 0 Unknown, 266 Unchecked, 0.3s Time] [2022-02-10 03:58:09,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1427 states. [2022-02-10 03:58:09,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1427 to 1143. [2022-02-10 03:58:09,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1143 states, 1142 states have (on average 2.268826619964974) internal successors, (2591), 1142 states have internal predecessors, (2591), 0 states have call successors, (0), 0 states 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 03:58:09,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1143 states to 1143 states and 2591 transitions. [2022-02-10 03:58:09,317 INFO L78 Accepts]: Start accepts. Automaton has 1143 states and 2591 transitions. Word has length 26 [2022-02-10 03:58:09,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:58:09,317 INFO L470 AbstractCegarLoop]: Abstraction has 1143 states and 2591 transitions. [2022-02-10 03:58:09,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:58:09,317 INFO L276 IsEmpty]: Start isEmpty. Operand 1143 states and 2591 transitions. [2022-02-10 03:58:09,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:58:09,319 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:58:09,319 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 03:58:09,334 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 03:58:09,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:58:09,519 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:58:09,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:58:09,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1592049050, now seen corresponding path program 10 times [2022-02-10 03:58:09,520 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:58:09,520 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015091456] [2022-02-10 03:58:09,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:58:09,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:58:09,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:58:09,757 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 03:58:09,758 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:58:09,758 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015091456] [2022-02-10 03:58:09,758 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015091456] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:58:09,758 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101245332] [2022-02-10 03:58:09,758 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:58:09,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:58:09,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:58:09,764 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 03:58:09,765 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 03:58:09,785 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:58:09,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:58:09,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-10 03:58:09,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:58:10,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:58:10,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:58:10,063 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 24 treesize of output 16 [2022-02-10 03:58:10,099 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 03:58:10,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:58:10,298 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-10 03:58:10,298 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 21 treesize of output 56 [2022-02-10 03:58:10,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:58:10,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:58:10,427 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:58:10,427 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 20 treesize of output 47 [2022-02-10 03:58:10,655 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 03:58:10,655 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101245332] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:58:10,655 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:58:10,655 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:58:10,655 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777405939] [2022-02-10 03:58:10,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:58:10,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:58:10,656 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:58:10,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:58:10,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:58:10,657 INFO L87 Difference]: Start difference. First operand 1143 states and 2591 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:58:11,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:58:11,743 INFO L93 Difference]: Finished difference Result 1606 states and 3456 transitions. [2022-02-10 03:58:11,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-10 03:58:11,744 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:58:11,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:58:11,746 INFO L225 Difference]: With dead ends: 1606 [2022-02-10 03:58:11,746 INFO L226 Difference]: Without dead ends: 1592 [2022-02-10 03:58:11,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=290, Invalid=1690, Unknown=0, NotChecked=0, Total=1980 [2022-02-10 03:58:11,747 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 177 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 846 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-10 03:58:11,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 200 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 846 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-10 03:58:11,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2022-02-10 03:58:11,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1146. [2022-02-10 03:58:11,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1146 states, 1145 states have (on average 2.274235807860262) internal successors, (2604), 1145 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states 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 03:58:11,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1146 states to 1146 states and 2604 transitions. [2022-02-10 03:58:11,760 INFO L78 Accepts]: Start accepts. Automaton has 1146 states and 2604 transitions. Word has length 26 [2022-02-10 03:58:11,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:58:11,760 INFO L470 AbstractCegarLoop]: Abstraction has 1146 states and 2604 transitions. [2022-02-10 03:58:11,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:58:11,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1146 states and 2604 transitions. [2022-02-10 03:58:11,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:58:11,762 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:58:11,762 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 03:58:11,777 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-02-10 03:58:11,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-02-10 03:58:11,970 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:58:11,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:58:11,971 INFO L85 PathProgramCache]: Analyzing trace with hash -608702818, now seen corresponding path program 11 times [2022-02-10 03:58:11,971 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:58:11,971 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308222968] [2022-02-10 03:58:11,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:58:11,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:58:11,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:58:12,202 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 03:58:12,202 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:58:12,202 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308222968] [2022-02-10 03:58:12,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308222968] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:58:12,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673539533] [2022-02-10 03:58:12,203 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:58:12,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:58:12,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:58:12,204 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 03:58:12,205 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 03:58:12,224 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:58:12,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:58:12,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-10 03:58:12,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:58:12,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:58:12,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:58:12,504 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 20 treesize of output 12 [2022-02-10 03:58:12,542 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 03:58:12,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:58:12,729 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-10 03:58:12,729 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 20 treesize of output 55 [2022-02-10 03:58:12,878 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:58:12,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:58:12,893 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:58:12,894 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 20 treesize of output 47 [2022-02-10 03:58:13,170 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 03:58:13,170 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673539533] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:58:13,170 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:58:13,170 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 03:58:13,170 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629564352] [2022-02-10 03:58:13,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:58:13,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:58:13,170 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:58:13,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:58:13,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:58:13,171 INFO L87 Difference]: Start difference. First operand 1146 states and 2604 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 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 03:58:14,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:58:14,016 INFO L93 Difference]: Finished difference Result 1600 states and 3422 transitions. [2022-02-10 03:58:14,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-10 03:58:14,017 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 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 26 [2022-02-10 03:58:14,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:58:14,019 INFO L225 Difference]: With dead ends: 1600 [2022-02-10 03:58:14,019 INFO L226 Difference]: Without dead ends: 1588 [2022-02-10 03:58:14,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=207, Invalid=1125, Unknown=0, NotChecked=0, Total=1332 [2022-02-10 03:58:14,020 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 136 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-10 03:58:14,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 179 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 786 Invalid, 0 Unknown, 46 Unchecked, 0.4s Time] [2022-02-10 03:58:14,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1588 states. [2022-02-10 03:58:14,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1588 to 1164. [2022-02-10 03:58:14,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1164 states, 1163 states have (on average 2.2656921754084265) internal successors, (2635), 1163 states have internal predecessors, (2635), 0 states have call successors, (0), 0 states 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 03:58:14,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1164 states to 1164 states and 2635 transitions. [2022-02-10 03:58:14,034 INFO L78 Accepts]: Start accepts. Automaton has 1164 states and 2635 transitions. Word has length 26 [2022-02-10 03:58:14,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:58:14,034 INFO L470 AbstractCegarLoop]: Abstraction has 1164 states and 2635 transitions. [2022-02-10 03:58:14,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 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 03:58:14,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1164 states and 2635 transitions. [2022-02-10 03:58:14,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:58:14,036 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:58:14,036 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 03:58:14,051 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 03:58:14,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-02-10 03:58:14,236 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:58:14,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:58:14,237 INFO L85 PathProgramCache]: Analyzing trace with hash -908829230, now seen corresponding path program 12 times [2022-02-10 03:58:14,237 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:58:14,237 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126768500] [2022-02-10 03:58:14,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:58:14,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:58:14,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:58:14,466 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 03:58:14,467 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:58:14,467 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126768500] [2022-02-10 03:58:14,467 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126768500] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:58:14,467 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738823328] [2022-02-10 03:58:14,467 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:58:14,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:58:14,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:58:14,468 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 03:58:14,468 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 03:58:14,488 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 03:58:14,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:58:14,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-10 03:58:14,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:58:14,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:58:14,751 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:58:14,752 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 24 treesize of output 24 [2022-02-10 03:58:14,810 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 03:58:14,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:58:15,044 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-10 03:58:15,044 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 21 treesize of output 56 [2022-02-10 03:58:15,215 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:58:15,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:58:15,231 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:58:15,231 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 20 treesize of output 47 [2022-02-10 03:58:15,469 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 03:58:15,469 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738823328] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:58:15,469 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:58:15,469 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-02-10 03:58:15,469 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911098415] [2022-02-10 03:58:15,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:58:15,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:58:15,469 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:58:15,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:58:15,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:58:15,470 INFO L87 Difference]: Start difference. First operand 1164 states and 2635 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:58:17,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:58:17,852 INFO L93 Difference]: Finished difference Result 1830 states and 3870 transitions. [2022-02-10 03:58:17,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-10 03:58:17,853 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:58:17,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:58:17,855 INFO L225 Difference]: With dead ends: 1830 [2022-02-10 03:58:17,855 INFO L226 Difference]: Without dead ends: 1813 [2022-02-10 03:58:17,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=801, Invalid=4601, Unknown=0, NotChecked=0, Total=5402 [2022-02-10 03:58:17,857 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 310 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-10 03:58:17,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 161 Invalid, 921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 860 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-10 03:58:17,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1813 states. [2022-02-10 03:58:17,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1813 to 1197. [2022-02-10 03:58:17,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1197 states, 1196 states have (on average 2.259197324414716) internal successors, (2702), 1196 states have internal predecessors, (2702), 0 states have call successors, (0), 0 states 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 03:58:17,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 2702 transitions. [2022-02-10 03:58:17,874 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 2702 transitions. Word has length 26 [2022-02-10 03:58:17,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:58:17,874 INFO L470 AbstractCegarLoop]: Abstraction has 1197 states and 2702 transitions. [2022-02-10 03:58:17,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:58:17,875 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 2702 transitions. [2022-02-10 03:58:17,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:58:17,876 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:58:17,876 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 03:58:17,893 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 03:58:18,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-02-10 03:58:18,092 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:58:18,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:58:18,092 INFO L85 PathProgramCache]: Analyzing trace with hash -2064882602, now seen corresponding path program 13 times [2022-02-10 03:58:18,092 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:58:18,092 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658146811] [2022-02-10 03:58:18,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:58:18,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:58:18,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:58:18,339 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 03:58:18,339 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:58:18,339 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658146811] [2022-02-10 03:58:18,339 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658146811] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:58:18,339 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718026156] [2022-02-10 03:58:18,340 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:58:18,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:58:18,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:58:18,341 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 03:58:18,341 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 03:58:18,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:58:18,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-10 03:58:18,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:58:18,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:58:18,686 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:58:18,686 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 22 treesize of output 22 [2022-02-10 03:58:18,766 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 03:58:18,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:58:18,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:58:18,993 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:58:18,993 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 20 treesize of output 55 [2022-02-10 03:58:19,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:58:19,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:58:19,358 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:58:19,358 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 20 treesize of output 47 [2022-02-10 03:58:19,704 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 03:58:19,705 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718026156] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:58:19,705 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:58:19,705 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-02-10 03:58:19,705 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867802086] [2022-02-10 03:58:19,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:58:19,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-10 03:58:19,705 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:58:19,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-10 03:58:19,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:58:19,706 INFO L87 Difference]: Start difference. First operand 1197 states and 2702 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:58:21,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:58:21,885 INFO L93 Difference]: Finished difference Result 1932 states and 3988 transitions. [2022-02-10 03:58:21,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-10 03:58:21,885 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:58:21,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:58:21,889 INFO L225 Difference]: With dead ends: 1932 [2022-02-10 03:58:21,889 INFO L226 Difference]: Without dead ends: 1908 [2022-02-10 03:58:21,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1619 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=840, Invalid=3852, Unknown=0, NotChecked=0, Total=4692 [2022-02-10 03:58:21,891 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 353 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 251 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-10 03:58:21,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 224 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 754 Invalid, 0 Unknown, 251 Unchecked, 0.4s Time] [2022-02-10 03:58:21,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1908 states. [2022-02-10 03:58:21,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1908 to 1224. [2022-02-10 03:58:21,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 1223 states have (on average 2.2583810302534753) internal successors, (2762), 1223 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states 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 03:58:21,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 2762 transitions. [2022-02-10 03:58:21,909 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 2762 transitions. Word has length 26 [2022-02-10 03:58:21,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:58:21,909 INFO L470 AbstractCegarLoop]: Abstraction has 1224 states and 2762 transitions. [2022-02-10 03:58:21,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:58:21,909 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 2762 transitions. [2022-02-10 03:58:21,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:58:21,911 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:58:21,911 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 03:58:21,927 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-02-10 03:58:22,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-02-10 03:58:22,112 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:58:22,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:58:22,112 INFO L85 PathProgramCache]: Analyzing trace with hash -144428454, now seen corresponding path program 15 times [2022-02-10 03:58:22,112 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:58:22,112 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514477246] [2022-02-10 03:58:22,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:58:22,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:58:22,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:58:22,416 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 03:58:22,416 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:58:22,416 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514477246] [2022-02-10 03:58:22,416 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514477246] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:58:22,416 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809639461] [2022-02-10 03:58:22,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:58:22,417 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:58:22,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:58:22,418 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 03:58:22,418 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 03:58:22,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:58:22,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:58:22,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-10 03:58:22,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:58:22,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:58:22,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:58:22,887 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:58:22,887 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 31 [2022-02-10 03:58:23,035 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 03:58:23,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:58:23,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:58:23,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:58:23,385 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:58:23,385 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 29 [2022-02-10 03:58:23,502 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 03:58:23,503 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809639461] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:58:23,503 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:58:23,503 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 32 [2022-02-10 03:58:23,503 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023380075] [2022-02-10 03:58:23,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:58:23,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-10 03:58:23,503 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:58:23,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-10 03:58:23,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=904, Unknown=0, NotChecked=0, Total=1056 [2022-02-10 03:58:23,505 INFO L87 Difference]: Start difference. First operand 1224 states and 2762 transitions. Second operand has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 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 03:58:24,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:58:24,731 INFO L93 Difference]: Finished difference Result 1397 states and 3116 transitions. [2022-02-10 03:58:24,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-10 03:58:24,731 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 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 03:58:24,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:58:24,733 INFO L225 Difference]: With dead ends: 1397 [2022-02-10 03:58:24,733 INFO L226 Difference]: Without dead ends: 1369 [2022-02-10 03:58:24,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 955 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=507, Invalid=3033, Unknown=0, NotChecked=0, Total=3540 [2022-02-10 03:58:24,734 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 137 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 487 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:58:24,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 181 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 432 Invalid, 0 Unknown, 487 Unchecked, 0.2s Time] [2022-02-10 03:58:24,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2022-02-10 03:58:24,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 1230. [2022-02-10 03:58:24,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 1229 states have (on average 2.256305939788446) internal successors, (2773), 1229 states have internal predecessors, (2773), 0 states have call successors, (0), 0 states 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 03:58:24,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 2773 transitions. [2022-02-10 03:58:24,747 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 2773 transitions. Word has length 26 [2022-02-10 03:58:24,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:58:24,747 INFO L470 AbstractCegarLoop]: Abstraction has 1230 states and 2773 transitions. [2022-02-10 03:58:24,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 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 03:58:24,747 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 2773 transitions. [2022-02-10 03:58:24,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:58:24,748 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:58:24,748 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 03:58:24,764 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 03:58:24,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:58:24,949 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:58:24,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:58:24,949 INFO L85 PathProgramCache]: Analyzing trace with hash -2008570082, now seen corresponding path program 16 times [2022-02-10 03:58:24,949 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:58:24,950 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687012850] [2022-02-10 03:58:24,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:58:24,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:58:24,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:58:25,287 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 03:58:25,287 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:58:25,287 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687012850] [2022-02-10 03:58:25,287 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687012850] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:58:25,287 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037022991] [2022-02-10 03:58:25,287 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:58:25,288 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:58:25,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:58:25,289 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 03:58:25,289 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 03:58:25,312 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:58:25,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:58:25,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-10 03:58:25,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:58:25,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:58:25,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:58:25,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:58:25,618 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 23 treesize of output 13 [2022-02-10 03:58:25,676 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 03:58:25,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:58:25,812 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-10 03:58:25,812 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 22 treesize of output 47 [2022-02-10 03:58:26,225 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 03:58:26,225 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037022991] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:58:26,225 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:58:26,225 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-02-10 03:58:26,225 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319002295] [2022-02-10 03:58:26,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:58:26,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-10 03:58:26,226 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:58:26,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-10 03:58:26,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2022-02-10 03:58:26,226 INFO L87 Difference]: Start difference. First operand 1230 states and 2773 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 03:58:28,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:58:28,389 INFO L93 Difference]: Finished difference Result 1689 states and 3739 transitions. [2022-02-10 03:58:28,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-10 03:58:28,390 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 03:58:28,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:58:28,392 INFO L225 Difference]: With dead ends: 1689 [2022-02-10 03:58:28,392 INFO L226 Difference]: Without dead ends: 1677 [2022-02-10 03:58:28,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1330 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=607, Invalid=3815, Unknown=0, NotChecked=0, Total=4422 [2022-02-10 03:58:28,393 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 217 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 1203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 195 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-10 03:58:28,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 233 Invalid, 1203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 953 Invalid, 0 Unknown, 195 Unchecked, 0.5s Time] [2022-02-10 03:58:28,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1677 states. [2022-02-10 03:58:28,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1677 to 1241. [2022-02-10 03:58:28,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1241 states, 1240 states have (on average 2.253225806451613) internal successors, (2794), 1240 states have internal predecessors, (2794), 0 states have call successors, (0), 0 states 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 03:58:28,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 2794 transitions. [2022-02-10 03:58:28,408 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 2794 transitions. Word has length 26 [2022-02-10 03:58:28,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:58:28,408 INFO L470 AbstractCegarLoop]: Abstraction has 1241 states and 2794 transitions. [2022-02-10 03:58:28,408 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 03:58:28,408 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 2794 transitions. [2022-02-10 03:58:28,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:58:28,410 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:58:28,410 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 03:58:28,433 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 03:58:28,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:58:28,611 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:58:28,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:58:28,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1938107238, now seen corresponding path program 14 times [2022-02-10 03:58:28,611 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:58:28,611 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812418933] [2022-02-10 03:58:28,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:58:28,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:58:28,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:58:28,828 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 03:58:28,829 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:58:28,829 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812418933] [2022-02-10 03:58:28,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812418933] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:58:28,829 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237539917] [2022-02-10 03:58:28,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:58:28,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:58:28,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:58:28,830 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 03:58:28,831 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 03:58:28,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:58:28,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:58:28,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-10 03:58:28,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:58:29,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:58:29,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:58:29,134 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 24 treesize of output 16 [2022-02-10 03:58:29,172 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 03:58:29,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:58:29,356 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-10 03:58:29,356 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 21 treesize of output 56 [2022-02-10 03:58:29,573 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:58:29,576 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:58:29,587 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:58:29,587 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 20 treesize of output 47 [2022-02-10 03:58:29,778 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 03:58:29,778 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237539917] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:58:29,778 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:58:29,778 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:58:29,778 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133907416] [2022-02-10 03:58:29,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:58:29,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:58:29,779 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:58:29,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:58:29,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:58:29,779 INFO L87 Difference]: Start difference. First operand 1241 states and 2794 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:58:30,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:58:30,455 INFO L93 Difference]: Finished difference Result 1565 states and 3393 transitions. [2022-02-10 03:58:30,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-10 03:58:30,456 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:58:30,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:58:30,458 INFO L225 Difference]: With dead ends: 1565 [2022-02-10 03:58:30,458 INFO L226 Difference]: Without dead ends: 1558 [2022-02-10 03:58:30,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=186, Invalid=1004, Unknown=0, NotChecked=0, Total=1190 [2022-02-10 03:58:30,459 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 122 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:58:30,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 158 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 03:58:30,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1558 states. [2022-02-10 03:58:30,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1558 to 1241. [2022-02-10 03:58:30,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1241 states, 1240 states have (on average 2.253225806451613) internal successors, (2794), 1240 states have internal predecessors, (2794), 0 states have call successors, (0), 0 states 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 03:58:30,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 2794 transitions. [2022-02-10 03:58:30,472 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 2794 transitions. Word has length 26 [2022-02-10 03:58:30,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:58:30,472 INFO L470 AbstractCegarLoop]: Abstraction has 1241 states and 2794 transitions. [2022-02-10 03:58:30,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:58:30,472 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 2794 transitions. [2022-02-10 03:58:30,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:58:30,474 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:58:30,474 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 03:58:30,489 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 03:58:30,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-02-10 03:58:30,674 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:58:30,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:58:30,675 INFO L85 PathProgramCache]: Analyzing trace with hash -400894506, now seen corresponding path program 15 times [2022-02-10 03:58:30,675 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:58:30,675 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266616780] [2022-02-10 03:58:30,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:58:30,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:58:30,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:58:30,889 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 03:58:30,889 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:58:30,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266616780] [2022-02-10 03:58:30,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266616780] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:58:30,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767763016] [2022-02-10 03:58:30,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:58:30,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:58:30,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:58:30,890 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 03:58:30,891 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 03:58:30,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:58:30,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:58:30,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-10 03:58:30,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:58:31,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:58:31,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:58:31,198 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 26 treesize of output 18 [2022-02-10 03:58:31,238 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 03:58:31,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:58:31,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:58:31,406 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:58:31,406 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 21 treesize of output 56 [2022-02-10 03:58:31,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:58:31,582 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:58:31,594 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:58:31,595 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 20 treesize of output 47 [2022-02-10 03:58:31,856 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 03:58:31,856 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767763016] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:58:31,856 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:58:31,856 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-10 03:58:31,857 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560360444] [2022-02-10 03:58:31,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:58:31,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:58:31,857 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:58:31,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:58:31,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:58:31,858 INFO L87 Difference]: Start difference. First operand 1241 states and 2794 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 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 03:58:33,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:58:33,040 INFO L93 Difference]: Finished difference Result 1676 states and 3580 transitions. [2022-02-10 03:58:33,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-10 03:58:33,040 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 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 03:58:33,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:58:33,042 INFO L225 Difference]: With dead ends: 1676 [2022-02-10 03:58:33,042 INFO L226 Difference]: Without dead ends: 1671 [2022-02-10 03:58:33,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=469, Invalid=2183, Unknown=0, NotChecked=0, Total=2652 [2022-02-10 03:58:33,043 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 198 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:58:33,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 148 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 640 Invalid, 0 Unknown, 45 Unchecked, 0.3s Time] [2022-02-10 03:58:33,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1671 states. [2022-02-10 03:58:33,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1671 to 1253. [2022-02-10 03:58:33,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1253 states, 1252 states have (on average 2.2563897763578273) internal successors, (2825), 1252 states have internal predecessors, (2825), 0 states have call successors, (0), 0 states 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 03:58:33,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1253 states to 1253 states and 2825 transitions. [2022-02-10 03:58:33,058 INFO L78 Accepts]: Start accepts. Automaton has 1253 states and 2825 transitions. Word has length 26 [2022-02-10 03:58:33,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:58:33,058 INFO L470 AbstractCegarLoop]: Abstraction has 1253 states and 2825 transitions. [2022-02-10 03:58:33,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 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 03:58:33,058 INFO L276 IsEmpty]: Start isEmpty. Operand 1253 states and 2825 transitions. [2022-02-10 03:58:33,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:58:33,060 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:58:33,060 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 03:58:33,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-02-10 03:58:33,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:58:33,260 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:58:33,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:58:33,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1458190486, now seen corresponding path program 16 times [2022-02-10 03:58:33,261 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:58:33,261 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740642115] [2022-02-10 03:58:33,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:58:33,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:58:33,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:58:33,459 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 03:58:33,459 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:58:33,459 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740642115] [2022-02-10 03:58:33,459 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740642115] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:58:33,459 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047397581] [2022-02-10 03:58:33,459 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:58:33,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:58:33,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:58:33,460 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 03:58:33,461 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 03:58:33,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:58:33,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:58:33,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-10 03:58:33,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:58:33,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:58:33,752 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:58:33,753 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 29 treesize of output 21 [2022-02-10 03:58:33,788 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 03:58:33,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:58:33,970 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-10 03:58:33,970 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 21 treesize of output 56 [2022-02-10 03:58:34,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:58:34,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:58:34,181 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:58:34,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-02-10 03:58:34,442 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 03:58:34,442 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047397581] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:58:34,442 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:58:34,442 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:58:34,442 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541930454] [2022-02-10 03:58:34,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:58:34,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:58:34,443 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:58:34,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:58:34,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:58:34,443 INFO L87 Difference]: Start difference. First operand 1253 states and 2825 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:58:35,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:58:35,120 INFO L93 Difference]: Finished difference Result 1619 states and 3490 transitions. [2022-02-10 03:58:35,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-10 03:58:35,121 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:58:35,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:58:35,123 INFO L225 Difference]: With dead ends: 1619 [2022-02-10 03:58:35,123 INFO L226 Difference]: Without dead ends: 1607 [2022-02-10 03:58:35,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=171, Invalid=951, Unknown=0, NotChecked=0, Total=1122 [2022-02-10 03:58:35,124 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 119 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:58:35,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 165 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 03:58:35,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1607 states. [2022-02-10 03:58:35,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1607 to 1258. [2022-02-10 03:58:35,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1258 states, 1257 states have (on average 2.252983293556086) internal successors, (2832), 1257 states have internal predecessors, (2832), 0 states have call successors, (0), 0 states 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 03:58:35,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 2832 transitions. [2022-02-10 03:58:35,138 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 2832 transitions. Word has length 26 [2022-02-10 03:58:35,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:58:35,139 INFO L470 AbstractCegarLoop]: Abstraction has 1258 states and 2832 transitions. [2022-02-10 03:58:35,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:58:35,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 2832 transitions. [2022-02-10 03:58:35,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:58:35,140 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:58:35,140 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 03:58:35,158 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 03:58:35,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:58:35,341 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:58:35,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:58:35,341 INFO L85 PathProgramCache]: Analyzing trace with hash 302137114, now seen corresponding path program 17 times [2022-02-10 03:58:35,341 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:58:35,341 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011844042] [2022-02-10 03:58:35,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:58:35,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:58:35,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:58:35,575 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 03:58:35,575 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:58:35,575 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011844042] [2022-02-10 03:58:35,575 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011844042] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:58:35,575 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425832810] [2022-02-10 03:58:35,575 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:58:35,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:58:35,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:58:35,577 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 03:58:35,578 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 03:58:35,599 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 03:58:35,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:58:35,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-10 03:58:35,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:58:35,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:58:35,916 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:58:35,917 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 20 treesize of output 20 [2022-02-10 03:58:36,012 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 03:58:36,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:58:36,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:58:36,265 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:58:36,277 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:58:36,285 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 21 treesize of output 48 [2022-02-10 03:58:36,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:58:36,376 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 20 treesize of output 5 [2022-02-10 03:58:36,528 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 03:58:36,528 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425832810] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:58:36,528 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:58:36,528 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 26 [2022-02-10 03:58:36,528 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250491513] [2022-02-10 03:58:36,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:58:36,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-10 03:58:36,529 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:58:36,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-10 03:58:36,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:58:36,529 INFO L87 Difference]: Start difference. First operand 1258 states and 2832 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:58:40,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:58:40,147 INFO L93 Difference]: Finished difference Result 1978 states and 4230 transitions. [2022-02-10 03:58:40,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-10 03:58:40,147 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:58:40,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:58:40,150 INFO L225 Difference]: With dead ends: 1978 [2022-02-10 03:58:40,150 INFO L226 Difference]: Without dead ends: 1966 [2022-02-10 03:58:40,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1785 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=983, Invalid=4567, Unknown=0, NotChecked=0, Total=5550 [2022-02-10 03:58:40,151 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 283 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 1157 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 1247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-10 03:58:40,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 234 Invalid, 1247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1157 Invalid, 0 Unknown, 31 Unchecked, 0.6s Time] [2022-02-10 03:58:40,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1966 states. [2022-02-10 03:58:40,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1966 to 1270. [2022-02-10 03:58:40,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1270 states, 1269 states have (on average 2.260047281323877) internal successors, (2868), 1269 states have internal predecessors, (2868), 0 states have call successors, (0), 0 states 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 03:58:40,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 2868 transitions. [2022-02-10 03:58:40,169 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 2868 transitions. Word has length 26 [2022-02-10 03:58:40,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:58:40,169 INFO L470 AbstractCegarLoop]: Abstraction has 1270 states and 2868 transitions. [2022-02-10 03:58:40,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:58:40,169 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 2868 transitions. [2022-02-10 03:58:40,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:58:40,171 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:58:40,171 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 03:58:40,188 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 03:58:40,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-02-10 03:58:40,371 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:58:40,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:58:40,372 INFO L85 PathProgramCache]: Analyzing trace with hash -188218022, now seen corresponding path program 17 times [2022-02-10 03:58:40,372 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:58:40,372 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190860903] [2022-02-10 03:58:40,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:58:40,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:58:40,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:58:40,638 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 03:58:40,638 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:58:40,638 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190860903] [2022-02-10 03:58:40,638 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190860903] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:58:40,638 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680021810] [2022-02-10 03:58:40,638 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:58:40,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:58:40,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:58:40,639 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 03:58:40,640 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 03:58:40,661 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 03:58:40,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:58:40,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-10 03:58:40,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:58:40,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:58:40,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:58:40,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:58:40,944 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 21 treesize of output 11 [2022-02-10 03:58:40,980 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 03:58:40,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:58:41,098 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-10 03:58:41,098 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 22 treesize of output 47 [2022-02-10 03:58:41,235 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 03:58:41,235 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680021810] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:58:41,235 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:58:41,235 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-02-10 03:58:41,235 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858245837] [2022-02-10 03:58:41,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:58:41,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-10 03:58:41,235 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:58:41,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-10 03:58:41,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2022-02-10 03:58:41,236 INFO L87 Difference]: Start difference. First operand 1270 states and 2868 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 03:58:42,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:58:42,299 INFO L93 Difference]: Finished difference Result 1690 states and 3731 transitions. [2022-02-10 03:58:42,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-10 03:58:42,299 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 03:58:42,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:58:42,302 INFO L225 Difference]: With dead ends: 1690 [2022-02-10 03:58:42,302 INFO L226 Difference]: Without dead ends: 1678 [2022-02-10 03:58:42,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=429, Invalid=2433, Unknown=0, NotChecked=0, Total=2862 [2022-02-10 03:58:42,303 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 177 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:58:42,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 195 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 03:58:42,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1678 states. [2022-02-10 03:58:42,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1678 to 1277. [2022-02-10 03:58:42,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1277 states, 1276 states have (on average 2.2586206896551726) internal successors, (2882), 1276 states have internal predecessors, (2882), 0 states have call successors, (0), 0 states 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 03:58:42,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1277 states to 1277 states and 2882 transitions. [2022-02-10 03:58:42,318 INFO L78 Accepts]: Start accepts. Automaton has 1277 states and 2882 transitions. Word has length 26 [2022-02-10 03:58:42,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:58:42,318 INFO L470 AbstractCegarLoop]: Abstraction has 1277 states and 2882 transitions. [2022-02-10 03:58:42,318 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 03:58:42,318 INFO L276 IsEmpty]: Start isEmpty. Operand 1277 states and 2882 transitions. [2022-02-10 03:58:42,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:58:42,320 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:58:42,320 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 03:58:42,341 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-02-10 03:58:42,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-02-10 03:58:42,520 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:58:42,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:58:42,521 INFO L85 PathProgramCache]: Analyzing trace with hash -585222294, now seen corresponding path program 18 times [2022-02-10 03:58:42,521 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:58:42,521 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418748534] [2022-02-10 03:58:42,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:58:42,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:58:42,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:58:42,815 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 03:58:42,815 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:58:42,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418748534] [2022-02-10 03:58:42,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418748534] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:58:42,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386685317] [2022-02-10 03:58:42,815 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:58:42,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:58:42,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:58:42,816 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 03:58:42,817 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 03:58:42,839 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 03:58:42,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:58:42,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-10 03:58:42,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:58:43,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:58:43,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:58:43,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:58:43,173 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:58:43,173 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 31 treesize of output 47 [2022-02-10 03:58:43,280 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 03:58:43,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:58:43,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:58:43,482 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:58:43,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:58:43,494 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:58:43,494 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 22 treesize of output 41 [2022-02-10 03:58:43,722 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:58:43,723 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386685317] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:58:43,723 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:58:43,723 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-02-10 03:58:43,723 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639020869] [2022-02-10 03:58:43,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:58:43,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-10 03:58:43,723 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:58:43,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-10 03:58:43,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2022-02-10 03:58:43,724 INFO L87 Difference]: Start difference. First operand 1277 states and 2882 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 03:58:45,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:58:45,129 INFO L93 Difference]: Finished difference Result 1535 states and 3368 transitions. [2022-02-10 03:58:45,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-10 03:58:45,130 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 03:58:45,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:58:45,132 INFO L225 Difference]: With dead ends: 1535 [2022-02-10 03:58:45,132 INFO L226 Difference]: Without dead ends: 1506 [2022-02-10 03:58:45,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1162 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=673, Invalid=3487, Unknown=0, NotChecked=0, Total=4160 [2022-02-10 03:58:45,133 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 212 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 197 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:58:45,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 160 Invalid, 866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 627 Invalid, 0 Unknown, 197 Unchecked, 0.3s Time] [2022-02-10 03:58:45,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2022-02-10 03:58:45,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1289. [2022-02-10 03:58:45,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1289 states, 1288 states have (on average 2.2569875776397517) internal successors, (2907), 1288 states have internal predecessors, (2907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:58:45,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1289 states to 1289 states and 2907 transitions. [2022-02-10 03:58:45,149 INFO L78 Accepts]: Start accepts. Automaton has 1289 states and 2907 transitions. Word has length 26 [2022-02-10 03:58:45,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:58:45,149 INFO L470 AbstractCegarLoop]: Abstraction has 1289 states and 2907 transitions. [2022-02-10 03:58:45,149 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 03:58:45,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1289 states and 2907 transitions. [2022-02-10 03:58:45,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:58:45,151 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:58:45,151 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 03:58:45,166 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 03:58:45,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-02-10 03:58:45,352 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:58:45,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:58:45,352 INFO L85 PathProgramCache]: Analyzing trace with hash -915805738, now seen corresponding path program 18 times [2022-02-10 03:58:45,352 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:58:45,352 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28738944] [2022-02-10 03:58:45,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:58:45,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:58:45,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:58:45,528 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 03:58:45,529 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:58:45,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28738944] [2022-02-10 03:58:45,529 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28738944] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:58:45,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308678432] [2022-02-10 03:58:45,529 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:58:45,529 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:58:45,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:58:45,530 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 03:58:45,531 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 03:58:45,552 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 03:58:45,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:58:45,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-10 03:58:45,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:58:45,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:58:45,943 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:58:45,943 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 22 treesize of output 30 [2022-02-10 03:58:46,099 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 03:58:46,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:58:46,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:58:46,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:58:46,443 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:58:46,443 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 38 treesize of output 55 [2022-02-10 03:58:46,944 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 03:58:46,944 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308678432] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:58:46,944 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:58:46,944 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-10 03:58:46,944 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512909129] [2022-02-10 03:58:46,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:58:46,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-10 03:58:46,945 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:58:46,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-10 03:58:46,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2022-02-10 03:58:46,945 INFO L87 Difference]: Start difference. First operand 1289 states and 2907 transitions. Second operand has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:58:49,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:58:49,514 INFO L93 Difference]: Finished difference Result 1708 states and 3737 transitions. [2022-02-10 03:58:49,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-10 03:58:49,515 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:58:49,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:58:49,517 INFO L225 Difference]: With dead ends: 1708 [2022-02-10 03:58:49,517 INFO L226 Difference]: Without dead ends: 1703 [2022-02-10 03:58:49,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1877 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=952, Invalid=5210, Unknown=0, NotChecked=0, Total=6162 [2022-02-10 03:58:49,518 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 240 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 1014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 313 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:58:49,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 218 Invalid, 1014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 652 Invalid, 0 Unknown, 313 Unchecked, 0.3s Time] [2022-02-10 03:58:49,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2022-02-10 03:58:49,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1307. [2022-02-10 03:58:49,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1307 states, 1306 states have (on average 2.254977029096478) internal successors, (2945), 1306 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states 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 03:58:49,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1307 states to 1307 states and 2945 transitions. [2022-02-10 03:58:49,534 INFO L78 Accepts]: Start accepts. Automaton has 1307 states and 2945 transitions. Word has length 26 [2022-02-10 03:58:49,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:58:49,534 INFO L470 AbstractCegarLoop]: Abstraction has 1307 states and 2945 transitions. [2022-02-10 03:58:49,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:58:49,534 INFO L276 IsEmpty]: Start isEmpty. Operand 1307 states and 2945 transitions. [2022-02-10 03:58:49,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:58:49,536 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:58:49,536 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 03:58:49,553 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 03:58:49,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:58:49,747 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:58:49,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:58:49,748 INFO L85 PathProgramCache]: Analyzing trace with hash -306479974, now seen corresponding path program 19 times [2022-02-10 03:58:49,748 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:58:49,748 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047033712] [2022-02-10 03:58:49,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:58:49,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:58:49,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:58:49,988 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 03:58:49,989 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:58:49,989 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047033712] [2022-02-10 03:58:49,989 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047033712] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:58:49,989 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036633021] [2022-02-10 03:58:49,989 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:58:49,989 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:58:49,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:58:49,990 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 03:58:49,990 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 03:58:50,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:58:50,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-10 03:58:50,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:58:50,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:58:50,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:58:50,357 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 24 treesize of output 16 [2022-02-10 03:58:50,404 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 03:58:50,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:58:50,623 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-10 03:58:50,623 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 21 treesize of output 56 [2022-02-10 03:58:51,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:58:51,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:58:51,050 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:58:51,050 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 20 treesize of output 47 [2022-02-10 03:58:51,582 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 03:58:51,583 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036633021] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:58:51,583 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:58:51,583 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-02-10 03:58:51,583 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390793808] [2022-02-10 03:58:51,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:58:51,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:58:51,583 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:58:51,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:58:51,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:58:51,584 INFO L87 Difference]: Start difference. First operand 1307 states and 2945 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:58:53,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:58:53,951 INFO L93 Difference]: Finished difference Result 2004 states and 4289 transitions. [2022-02-10 03:58:53,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-10 03:58:53,952 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:58:53,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:58:53,955 INFO L225 Difference]: With dead ends: 2004 [2022-02-10 03:58:53,955 INFO L226 Difference]: Without dead ends: 1998 [2022-02-10 03:58:53,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1055 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=593, Invalid=3189, Unknown=0, NotChecked=0, Total=3782 [2022-02-10 03:58:53,956 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 207 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 1073 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 1126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-10 03:58:53,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 212 Invalid, 1126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1073 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-10 03:58:53,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1998 states. [2022-02-10 03:58:53,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1998 to 1310. [2022-02-10 03:58:53,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1310 states, 1309 states have (on average 2.2536287242169597) internal successors, (2950), 1309 states have internal predecessors, (2950), 0 states have call successors, (0), 0 states 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 03:58:53,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310 states to 1310 states and 2950 transitions. [2022-02-10 03:58:53,974 INFO L78 Accepts]: Start accepts. Automaton has 1310 states and 2950 transitions. Word has length 26 [2022-02-10 03:58:53,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:58:53,974 INFO L470 AbstractCegarLoop]: Abstraction has 1310 states and 2950 transitions. [2022-02-10 03:58:53,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:58:53,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1310 states and 2950 transitions. [2022-02-10 03:58:53,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:58:53,976 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:58:53,976 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 03:58:53,997 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 03:58:54,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-02-10 03:58:54,177 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:58:54,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:58:54,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1787735454, now seen corresponding path program 20 times [2022-02-10 03:58:54,177 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:58:54,177 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668678002] [2022-02-10 03:58:54,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:58:54,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:58:54,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:58:54,345 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 03:58:54,345 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:58:54,345 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668678002] [2022-02-10 03:58:54,345 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668678002] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:58:54,345 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111825402] [2022-02-10 03:58:54,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:58:54,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:58:54,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:58:54,346 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 03:58:54,347 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 03:58:54,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:58:54,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:58:54,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-10 03:58:54,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:58:54,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:58:54,649 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:58:54,649 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 24 treesize of output 32 [2022-02-10 03:58:54,780 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 03:58:54,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:58:54,930 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:58:54,930 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 37 treesize of output 70 [2022-02-10 03:58:55,866 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 03:58:55,866 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111825402] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:58:55,866 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:58:55,866 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-10 03:58:55,866 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338504655] [2022-02-10 03:58:55,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:58:55,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-10 03:58:55,867 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:58:55,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-10 03:58:55,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2022-02-10 03:58:55,867 INFO L87 Difference]: Start difference. First operand 1310 states and 2950 transitions. Second operand has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:58:57,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:58:57,062 INFO L93 Difference]: Finished difference Result 1694 states and 3647 transitions. [2022-02-10 03:58:57,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-10 03:58:57,062 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:58:57,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:58:57,064 INFO L225 Difference]: With dead ends: 1694 [2022-02-10 03:58:57,064 INFO L226 Difference]: Without dead ends: 1682 [2022-02-10 03:58:57,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=416, Invalid=1564, Unknown=0, NotChecked=0, Total=1980 [2022-02-10 03:58:57,065 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 209 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:58:57,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 125 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 490 Invalid, 0 Unknown, 198 Unchecked, 0.3s Time] [2022-02-10 03:58:57,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1682 states. [2022-02-10 03:58:57,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1682 to 1314. [2022-02-10 03:58:57,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1314 states, 1313 states have (on average 2.2513328255902514) internal successors, (2956), 1313 states have internal predecessors, (2956), 0 states have call successors, (0), 0 states 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 03:58:57,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1314 states to 1314 states and 2956 transitions. [2022-02-10 03:58:57,079 INFO L78 Accepts]: Start accepts. Automaton has 1314 states and 2956 transitions. Word has length 26 [2022-02-10 03:58:57,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:58:57,079 INFO L470 AbstractCegarLoop]: Abstraction has 1314 states and 2956 transitions. [2022-02-10 03:58:57,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:58:57,079 INFO L276 IsEmpty]: Start isEmpty. Operand 1314 states and 2956 transitions. [2022-02-10 03:58:57,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:58:57,081 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:58:57,081 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 03:58:57,096 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-02-10 03:58:57,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-02-10 03:58:57,281 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:58:57,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:58:57,282 INFO L85 PathProgramCache]: Analyzing trace with hash -162675810, now seen corresponding path program 21 times [2022-02-10 03:58:57,282 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:58:57,282 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648190682] [2022-02-10 03:58:57,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:58:57,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:58:57,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:58:57,436 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 03:58:57,436 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:58:57,436 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648190682] [2022-02-10 03:58:57,436 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648190682] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:58:57,436 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403765184] [2022-02-10 03:58:57,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:58:57,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:58:57,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:58:57,437 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 03:58:57,438 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 03:58:57,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:58:57,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:58:57,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-10 03:58:57,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:58:57,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:58:57,718 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:58:57,719 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 27 treesize of output 33 [2022-02-10 03:58:57,916 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 03:58:57,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:58:58,134 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:58:58,134 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 37 treesize of output 70 [2022-02-10 03:58:59,360 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 03:58:59,361 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403765184] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:58:59,361 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:58:59,361 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-10 03:58:59,361 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640999622] [2022-02-10 03:58:59,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:58:59,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 03:58:59,361 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:58:59,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 03:58:59,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2022-02-10 03:58:59,362 INFO L87 Difference]: Start difference. First operand 1314 states and 2956 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:59:00,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:59:00,734 INFO L93 Difference]: Finished difference Result 1712 states and 3685 transitions. [2022-02-10 03:59:00,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-10 03:59:00,734 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:59:00,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:59:00,737 INFO L225 Difference]: With dead ends: 1712 [2022-02-10 03:59:00,737 INFO L226 Difference]: Without dead ends: 1700 [2022-02-10 03:59:00,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 34 SyntacticMatches, 8 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=363, Invalid=1443, Unknown=0, NotChecked=0, Total=1806 [2022-02-10 03:59:00,737 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 206 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 274 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:59:00,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 92 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 280 Invalid, 0 Unknown, 274 Unchecked, 0.1s Time] [2022-02-10 03:59:00,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1700 states. [2022-02-10 03:59:00,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1700 to 1333. [2022-02-10 03:59:00,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1333 states, 1332 states have (on average 2.2477477477477477) internal successors, (2994), 1332 states have internal predecessors, (2994), 0 states have call successors, (0), 0 states 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 03:59:00,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1333 states to 1333 states and 2994 transitions. [2022-02-10 03:59:00,752 INFO L78 Accepts]: Start accepts. Automaton has 1333 states and 2994 transitions. Word has length 26 [2022-02-10 03:59:00,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:59:00,752 INFO L470 AbstractCegarLoop]: Abstraction has 1333 states and 2994 transitions. [2022-02-10 03:59:00,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:59:00,752 INFO L276 IsEmpty]: Start isEmpty. Operand 1333 states and 2994 transitions. [2022-02-10 03:59:00,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:59:00,754 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:59:00,754 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 03:59:00,769 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 03:59:00,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:59:00,954 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:59:00,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:59:00,955 INFO L85 PathProgramCache]: Analyzing trace with hash 870573974, now seen corresponding path program 22 times [2022-02-10 03:59:00,955 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:59:00,955 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801946806] [2022-02-10 03:59:00,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:59:00,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:59:00,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:59:01,123 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 03:59:01,123 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:59:01,123 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801946806] [2022-02-10 03:59:01,123 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801946806] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:59:01,123 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056223582] [2022-02-10 03:59:01,123 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:59:01,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:59:01,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:59:01,124 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 03:59:01,125 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 03:59:01,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:59:01,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:59:01,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-10 03:59:01,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:59:01,616 INFO L353 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2022-02-10 03:59:01,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 47 [2022-02-10 03:59:01,660 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 03:59:01,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:59:01,853 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:59:01,853 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 38 treesize of output 71 [2022-02-10 03:59:03,075 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 03:59:03,075 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056223582] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:59:03,075 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:59:03,076 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-10 03:59:03,076 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333596326] [2022-02-10 03:59:03,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:59:03,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-10 03:59:03,076 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:59:03,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-10 03:59:03,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:59:03,076 INFO L87 Difference]: Start difference. First operand 1333 states and 2994 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:59:03,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:59:03,761 INFO L93 Difference]: Finished difference Result 1495 states and 3291 transitions. [2022-02-10 03:59:03,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-10 03:59:03,761 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:59:03,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:59:03,763 INFO L225 Difference]: With dead ends: 1495 [2022-02-10 03:59:03,763 INFO L226 Difference]: Without dead ends: 1490 [2022-02-10 03:59:03,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=341, Invalid=1551, Unknown=0, NotChecked=0, Total=1892 [2022-02-10 03:59:03,763 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 109 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 202 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:59:03,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 130 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 244 Invalid, 0 Unknown, 202 Unchecked, 0.1s Time] [2022-02-10 03:59:03,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1490 states. [2022-02-10 03:59:03,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1490 to 1337. [2022-02-10 03:59:03,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1337 states, 1336 states have (on average 2.252245508982036) internal successors, (3009), 1336 states have internal predecessors, (3009), 0 states have call successors, (0), 0 states 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 03:59:03,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1337 states to 1337 states and 3009 transitions. [2022-02-10 03:59:03,777 INFO L78 Accepts]: Start accepts. Automaton has 1337 states and 3009 transitions. Word has length 26 [2022-02-10 03:59:03,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:59:03,777 INFO L470 AbstractCegarLoop]: Abstraction has 1337 states and 3009 transitions. [2022-02-10 03:59:03,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:59:03,777 INFO L276 IsEmpty]: Start isEmpty. Operand 1337 states and 3009 transitions. [2022-02-10 03:59:03,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:59:03,779 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:59:03,779 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 03:59:03,794 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-02-10 03:59:03,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-02-10 03:59:03,979 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:59:03,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:59:03,980 INFO L85 PathProgramCache]: Analyzing trace with hash 483673174, now seen corresponding path program 23 times [2022-02-10 03:59:03,980 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:59:03,980 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875913621] [2022-02-10 03:59:03,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:59:03,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:59:03,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:59:04,138 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 03:59:04,139 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:59:04,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875913621] [2022-02-10 03:59:04,139 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875913621] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:59:04,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087520412] [2022-02-10 03:59:04,139 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:59:04,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:59:04,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:59:04,145 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 03:59:04,147 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 03:59:04,171 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:59:04,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:59:04,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-10 03:59:04,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:59:04,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:59:04,474 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:59:04,474 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 34 [2022-02-10 03:59:04,614 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 03:59:04,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:59:04,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:59:04,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:59:04,889 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:59:04,889 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 21 treesize of output 48 [2022-02-10 03:59:04,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:59:04,985 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 20 treesize of output 5 [2022-02-10 03:59:05,188 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 03:59:05,188 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087520412] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:59:05,188 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:59:05,188 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 26 [2022-02-10 03:59:05,188 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141736003] [2022-02-10 03:59:05,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:59:05,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-10 03:59:05,189 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:59:05,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-10 03:59:05,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:59:05,189 INFO L87 Difference]: Start difference. First operand 1337 states and 3009 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 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 03:59:10,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:59:10,305 INFO L93 Difference]: Finished difference Result 2445 states and 5160 transitions. [2022-02-10 03:59:10,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-02-10 03:59:10,305 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 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 03:59:10,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:59:10,308 INFO L225 Difference]: With dead ends: 2445 [2022-02-10 03:59:10,308 INFO L226 Difference]: Without dead ends: 2427 [2022-02-10 03:59:10,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3484 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1747, Invalid=8153, Unknown=0, NotChecked=0, Total=9900 [2022-02-10 03:59:10,310 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 440 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 1320 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 1420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-10 03:59:10,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [440 Valid, 248 Invalid, 1420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1320 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-10 03:59:10,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2427 states. [2022-02-10 03:59:10,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2427 to 1403. [2022-02-10 03:59:10,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1403 states, 1402 states have (on average 2.2796005706134093) internal successors, (3196), 1402 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states 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 03:59:10,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1403 states to 1403 states and 3196 transitions. [2022-02-10 03:59:10,332 INFO L78 Accepts]: Start accepts. Automaton has 1403 states and 3196 transitions. Word has length 26 [2022-02-10 03:59:10,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:59:10,332 INFO L470 AbstractCegarLoop]: Abstraction has 1403 states and 3196 transitions. [2022-02-10 03:59:10,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 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 03:59:10,332 INFO L276 IsEmpty]: Start isEmpty. Operand 1403 states and 3196 transitions. [2022-02-10 03:59:10,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:59:10,334 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:59:10,334 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 03:59:10,352 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 03:59:10,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:59:10,547 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:59:10,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:59:10,548 INFO L85 PathProgramCache]: Analyzing trace with hash -285479398, now seen corresponding path program 24 times [2022-02-10 03:59:10,548 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:59:10,548 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817742877] [2022-02-10 03:59:10,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:59:10,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:59:10,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:59:10,705 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 03:59:10,705 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:59:10,705 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817742877] [2022-02-10 03:59:10,705 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817742877] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:59:10,705 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392798900] [2022-02-10 03:59:10,705 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:59:10,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:59:10,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:59:10,707 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:59:10,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-02-10 03:59:10,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 03:59:10,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:59:10,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-10 03:59:10,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:59:11,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:59:11,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:59:11,028 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:59:11,028 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 40 treesize of output 36 [2022-02-10 03:59:11,098 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 03:59:11,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:59:11,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:59:11,242 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:59:11,243 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 20 treesize of output 55 [2022-02-10 03:59:11,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:59:11,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:59:11,531 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:59:11,531 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 20 treesize of output 47 [2022-02-10 03:59:11,990 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 03:59:11,990 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392798900] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:59:11,990 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:59:11,990 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-10 03:59:11,990 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177876644] [2022-02-10 03:59:11,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:59:11,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-10 03:59:11,990 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:59:11,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-10 03:59:11,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2022-02-10 03:59:11,991 INFO L87 Difference]: Start difference. First operand 1403 states and 3196 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:59:13,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:59:13,520 INFO L93 Difference]: Finished difference Result 1877 states and 4103 transitions. [2022-02-10 03:59:13,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-10 03:59:13,520 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:59:13,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:59:13,523 INFO L225 Difference]: With dead ends: 1877 [2022-02-10 03:59:13,524 INFO L226 Difference]: Without dead ends: 1872 [2022-02-10 03:59:13,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=543, Invalid=2319, Unknown=0, NotChecked=0, Total=2862 [2022-02-10 03:59:13,524 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 190 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 327 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:59:13,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 158 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 531 Invalid, 0 Unknown, 327 Unchecked, 0.3s Time] [2022-02-10 03:59:13,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1872 states. [2022-02-10 03:59:13,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1872 to 1423. [2022-02-10 03:59:13,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1423 states, 1422 states have (on average 2.2862165963431784) internal successors, (3251), 1422 states have internal predecessors, (3251), 0 states have call successors, (0), 0 states 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 03:59:13,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1423 states to 1423 states and 3251 transitions. [2022-02-10 03:59:13,543 INFO L78 Accepts]: Start accepts. Automaton has 1423 states and 3251 transitions. Word has length 26 [2022-02-10 03:59:13,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:59:13,543 INFO L470 AbstractCegarLoop]: Abstraction has 1423 states and 3251 transitions. [2022-02-10 03:59:13,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:59:13,543 INFO L276 IsEmpty]: Start isEmpty. Operand 1423 states and 3251 transitions. [2022-02-10 03:59:13,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:59:13,545 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:59:13,545 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 03:59:13,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-02-10 03:59:13,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:59:13,761 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:59:13,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:59:13,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1206269730, now seen corresponding path program 25 times [2022-02-10 03:59:13,762 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:59:13,762 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960274005] [2022-02-10 03:59:13,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:59:13,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:59:13,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:59:13,944 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 03:59:13,944 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:59:13,944 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960274005] [2022-02-10 03:59:13,944 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960274005] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:59:13,944 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619779892] [2022-02-10 03:59:13,944 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:59:13,944 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:59:13,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:59:13,945 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:59:13,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-02-10 03:59:13,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:59:13,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-10 03:59:13,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:59:14,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:59:14,298 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:59:14,298 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 29 treesize of output 29 [2022-02-10 03:59:14,371 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 03:59:14,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:59:14,536 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-10 03:59:14,537 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 20 treesize of output 55 [2022-02-10 03:59:14,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:59:14,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:59:14,755 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:59:14,755 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 20 treesize of output 47 [2022-02-10 03:59:15,362 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 03:59:15,362 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619779892] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:59:15,362 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:59:15,362 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-10 03:59:15,362 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925948857] [2022-02-10 03:59:15,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:59:15,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 03:59:15,362 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:59:15,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 03:59:15,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2022-02-10 03:59:15,363 INFO L87 Difference]: Start difference. First operand 1423 states and 3251 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:59:16,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:59:16,124 INFO L93 Difference]: Finished difference Result 1860 states and 4067 transitions. [2022-02-10 03:59:16,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-10 03:59:16,125 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:59:16,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:59:16,127 INFO L225 Difference]: With dead ends: 1860 [2022-02-10 03:59:16,128 INFO L226 Difference]: Without dead ends: 1851 [2022-02-10 03:59:16,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=218, Invalid=972, Unknown=0, NotChecked=0, Total=1190 [2022-02-10 03:59:16,128 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 129 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:59:16,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 241 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 03:59:16,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1851 states. [2022-02-10 03:59:16,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1851 to 1425. [2022-02-10 03:59:16,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1425 states, 1424 states have (on average 2.2851123595505616) internal successors, (3254), 1424 states have internal predecessors, (3254), 0 states have call successors, (0), 0 states 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 03:59:16,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1425 states to 1425 states and 3254 transitions. [2022-02-10 03:59:16,145 INFO L78 Accepts]: Start accepts. Automaton has 1425 states and 3254 transitions. Word has length 26 [2022-02-10 03:59:16,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:59:16,145 INFO L470 AbstractCegarLoop]: Abstraction has 1425 states and 3254 transitions. [2022-02-10 03:59:16,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:59:16,145 INFO L276 IsEmpty]: Start isEmpty. Operand 1425 states and 3254 transitions. [2022-02-10 03:59:16,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:59:16,147 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:59:16,147 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 03:59:16,165 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-02-10 03:59:16,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-02-10 03:59:16,347 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:59:16,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:59:16,347 INFO L85 PathProgramCache]: Analyzing trace with hash -755801834, now seen corresponding path program 26 times [2022-02-10 03:59:16,347 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:59:16,348 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240729029] [2022-02-10 03:59:16,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:59:16,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:59:16,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:59:16,542 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 03:59:16,543 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:59:16,543 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240729029] [2022-02-10 03:59:16,543 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240729029] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:59:16,543 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381042347] [2022-02-10 03:59:16,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:59:16,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:59:16,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:59:16,544 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:59:16,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-02-10 03:59:16,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:59:16,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:59:16,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-10 03:59:16,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:59:17,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:59:17,036 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:59:17,036 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 25 treesize of output 33 [2022-02-10 03:59:17,200 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 03:59:17,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:59:17,446 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:59:17,447 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 38 treesize of output 71 [2022-02-10 03:59:19,854 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 03:59:19,854 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381042347] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:59:19,854 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:59:19,854 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 26 [2022-02-10 03:59:19,854 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232190614] [2022-02-10 03:59:19,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:59:19,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-10 03:59:19,855 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:59:19,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-10 03:59:19,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:59:19,855 INFO L87 Difference]: Start difference. First operand 1425 states and 3254 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 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 03:59:21,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:59:21,896 INFO L93 Difference]: Finished difference Result 1887 states and 4125 transitions. [2022-02-10 03:59:21,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-10 03:59:21,896 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 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 03:59:21,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:59:21,899 INFO L225 Difference]: With dead ends: 1887 [2022-02-10 03:59:21,899 INFO L226 Difference]: Without dead ends: 1875 [2022-02-10 03:59:21,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=568, Invalid=2738, Unknown=0, NotChecked=0, Total=3306 [2022-02-10 03:59:21,900 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 228 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 339 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:59:21,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 170 Invalid, 919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 518 Invalid, 0 Unknown, 339 Unchecked, 0.3s Time] [2022-02-10 03:59:21,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2022-02-10 03:59:21,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1428. [2022-02-10 03:59:21,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1428 states, 1427 states have (on average 2.283812193412754) internal successors, (3259), 1427 states have internal predecessors, (3259), 0 states have call successors, (0), 0 states 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 03:59:21,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 3259 transitions. [2022-02-10 03:59:21,916 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 3259 transitions. Word has length 26 [2022-02-10 03:59:21,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:59:21,916 INFO L470 AbstractCegarLoop]: Abstraction has 1428 states and 3259 transitions. [2022-02-10 03:59:21,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 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 03:59:21,916 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 3259 transitions. [2022-02-10 03:59:21,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:59:21,918 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:59:21,918 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 03:59:21,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-02-10 03:59:22,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-02-10 03:59:22,119 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:59:22,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:59:22,119 INFO L85 PathProgramCache]: Analyzing trace with hash -2095905962, now seen corresponding path program 27 times [2022-02-10 03:59:22,119 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:59:22,119 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919475086] [2022-02-10 03:59:22,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:59:22,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:59:22,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:59:22,420 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 03:59:22,420 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:59:22,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919475086] [2022-02-10 03:59:22,420 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919475086] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:59:22,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257978048] [2022-02-10 03:59:22,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:59:22,420 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:59:22,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:59:22,421 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:59:22,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-02-10 03:59:22,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:59:22,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:59:22,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-10 03:59:22,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:59:22,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:59:22,990 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:59:22,991 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 22 treesize of output 30 [2022-02-10 03:59:23,184 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 03:59:23,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:59:23,503 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:59:23,503 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 37 treesize of output 70 [2022-02-10 03:59:26,355 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 03:59:26,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257978048] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:59:26,356 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:59:26,356 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-10 03:59:26,356 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070835173] [2022-02-10 03:59:26,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:59:26,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-10 03:59:26,356 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:59:26,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-10 03:59:26,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2022-02-10 03:59:26,357 INFO L87 Difference]: Start difference. First operand 1428 states and 3259 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:59:27,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:59:27,500 INFO L93 Difference]: Finished difference Result 1743 states and 3852 transitions. [2022-02-10 03:59:27,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-10 03:59:27,501 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:59:27,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:59:27,504 INFO L225 Difference]: With dead ends: 1743 [2022-02-10 03:59:27,504 INFO L226 Difference]: Without dead ends: 1738 [2022-02-10 03:59:27,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=354, Invalid=1626, Unknown=0, NotChecked=0, Total=1980 [2022-02-10 03:59:27,504 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 117 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 439 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:59:27,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 147 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 322 Invalid, 0 Unknown, 439 Unchecked, 0.2s Time] [2022-02-10 03:59:27,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2022-02-10 03:59:27,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1434. [2022-02-10 03:59:27,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1434 states, 1433 states have (on average 2.286113049546406) internal successors, (3276), 1433 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:59:27,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1434 states to 1434 states and 3276 transitions. [2022-02-10 03:59:27,527 INFO L78 Accepts]: Start accepts. Automaton has 1434 states and 3276 transitions. Word has length 26 [2022-02-10 03:59:27,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:59:27,528 INFO L470 AbstractCegarLoop]: Abstraction has 1434 states and 3276 transitions. [2022-02-10 03:59:27,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:59:27,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1434 states and 3276 transitions. [2022-02-10 03:59:27,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:59:27,530 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:59:27,530 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 03:59:27,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-02-10 03:59:27,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-02-10 03:59:27,730 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:59:27,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:59:27,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1278271002, now seen corresponding path program 28 times [2022-02-10 03:59:27,731 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:59:27,731 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117551087] [2022-02-10 03:59:27,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:59:27,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:59:27,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:59:28,075 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 03:59:28,076 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:59:28,076 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117551087] [2022-02-10 03:59:28,076 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117551087] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:59:28,076 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235079560] [2022-02-10 03:59:28,076 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:59:28,076 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:59:28,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:59:28,077 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:59:28,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-02-10 03:59:28,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:59:28,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:59:28,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-10 03:59:28,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:59:28,669 INFO L353 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2022-02-10 03:59:28,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 69 [2022-02-10 03:59:28,796 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 03:59:28,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:59:29,028 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-10 03:59:29,028 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 21 treesize of output 56 [2022-02-10 03:59:29,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:59:29,458 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:59:29,474 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:59:29,474 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 20 treesize of output 47 [2022-02-10 03:59:30,296 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 03:59:30,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235079560] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:59:30,296 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:59:30,296 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-02-10 03:59:30,296 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501048767] [2022-02-10 03:59:30,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:59:30,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:59:30,297 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:59:30,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:59:30,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:59:30,297 INFO L87 Difference]: Start difference. First operand 1434 states and 3276 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 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 03:59:32,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:59:32,639 INFO L93 Difference]: Finished difference Result 2275 states and 4839 transitions. [2022-02-10 03:59:32,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-10 03:59:32,639 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 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 03:59:32,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:59:32,642 INFO L225 Difference]: With dead ends: 2275 [2022-02-10 03:59:32,642 INFO L226 Difference]: Without dead ends: 2236 [2022-02-10 03:59:32,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1735 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=902, Invalid=5104, Unknown=0, NotChecked=0, Total=6006 [2022-02-10 03:59:32,643 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 333 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 1314 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 1383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-10 03:59:32,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 262 Invalid, 1383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1314 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-10 03:59:32,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2236 states. [2022-02-10 03:59:32,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2236 to 1461. [2022-02-10 03:59:32,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1461 states, 1460 states have (on average 2.286986301369863) internal successors, (3339), 1460 states have internal predecessors, (3339), 0 states have call successors, (0), 0 states 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 03:59:32,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1461 states to 1461 states and 3339 transitions. [2022-02-10 03:59:32,664 INFO L78 Accepts]: Start accepts. Automaton has 1461 states and 3339 transitions. Word has length 26 [2022-02-10 03:59:32,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:59:32,665 INFO L470 AbstractCegarLoop]: Abstraction has 1461 states and 3339 transitions. [2022-02-10 03:59:32,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 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 03:59:32,665 INFO L276 IsEmpty]: Start isEmpty. Operand 1461 states and 3339 transitions. [2022-02-10 03:59:32,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:59:32,669 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:59:32,670 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 03:59:32,686 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-02-10 03:59:32,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:59:32,879 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:59:32,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:59:32,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1883912102, now seen corresponding path program 19 times [2022-02-10 03:59:32,880 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:59:32,880 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100806814] [2022-02-10 03:59:32,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:59:32,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:59:32,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:59:33,077 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 03:59:33,078 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:59:33,078 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100806814] [2022-02-10 03:59:33,078 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100806814] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:59:33,078 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658682690] [2022-02-10 03:59:33,078 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:59:33,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:59:33,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:59:33,079 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:59:33,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-02-10 03:59:33,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:59:33,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-10 03:59:33,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:59:33,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:59:33,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:59:33,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:59:33,393 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 26 treesize of output 16 [2022-02-10 03:59:33,429 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 03:59:33,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:59:33,520 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-10 03:59:33,521 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 22 treesize of output 47 [2022-02-10 03:59:33,682 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 03:59:33,682 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658682690] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:59:33,683 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:59:33,683 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 22 [2022-02-10 03:59:33,683 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729594722] [2022-02-10 03:59:33,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:59:33,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-10 03:59:33,683 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:59:33,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-10 03:59:33,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:59:33,683 INFO L87 Difference]: Start difference. First operand 1461 states and 3339 transitions. Second operand has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:59:34,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:59:34,418 INFO L93 Difference]: Finished difference Result 1669 states and 3697 transitions. [2022-02-10 03:59:34,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-10 03:59:34,418 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:59:34,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:59:34,421 INFO L225 Difference]: With dead ends: 1669 [2022-02-10 03:59:34,421 INFO L226 Difference]: Without dead ends: 1657 [2022-02-10 03:59:34,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=301, Invalid=1769, Unknown=0, NotChecked=0, Total=2070 [2022-02-10 03:59:34,422 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 181 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:59:34,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 180 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 03:59:34,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1657 states. [2022-02-10 03:59:34,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1657 to 1474. [2022-02-10 03:59:34,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1474 states, 1473 states have (on average 2.2878479293957907) internal successors, (3370), 1473 states have internal predecessors, (3370), 0 states have call successors, (0), 0 states 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 03:59:34,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 3370 transitions. [2022-02-10 03:59:34,438 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 3370 transitions. Word has length 26 [2022-02-10 03:59:34,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:59:34,438 INFO L470 AbstractCegarLoop]: Abstraction has 1474 states and 3370 transitions. [2022-02-10 03:59:34,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:59:34,438 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 3370 transitions. [2022-02-10 03:59:34,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:59:34,440 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:59:34,440 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 03:59:34,456 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-02-10 03:59:34,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-02-10 03:59:34,641 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:59:34,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:59:34,641 INFO L85 PathProgramCache]: Analyzing trace with hash 546913566, now seen corresponding path program 20 times [2022-02-10 03:59:34,641 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:59:34,641 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689361750] [2022-02-10 03:59:34,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:59:34,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:59:34,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:59:34,859 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 03:59:34,859 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:59:34,859 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689361750] [2022-02-10 03:59:34,859 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689361750] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:59:34,859 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386414460] [2022-02-10 03:59:34,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:59:34,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:59:34,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:59:34,860 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:59:34,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-02-10 03:59:34,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:59:34,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:59:34,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-10 03:59:34,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:59:35,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:59:35,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:59:35,141 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:59:35,141 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:59:35,142 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 25 treesize of output 13 [2022-02-10 03:59:35,210 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 03:59:35,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:59:35,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:59:35,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:59:35,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:59:35,349 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:59:35,350 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 22 treesize of output 41 [2022-02-10 03:59:35,507 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 03:59:35,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386414460] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:59:35,508 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:59:35,508 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-10 03:59:35,508 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662204216] [2022-02-10 03:59:35,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:59:35,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-10 03:59:35,508 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:59:35,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-10 03:59:35,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2022-02-10 03:59:35,509 INFO L87 Difference]: Start difference. First operand 1474 states and 3370 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 27 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 03:59:36,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:59:36,838 INFO L93 Difference]: Finished difference Result 1925 states and 4277 transitions. [2022-02-10 03:59:36,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-10 03:59:36,839 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 27 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 03:59:36,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:59:36,842 INFO L225 Difference]: With dead ends: 1925 [2022-02-10 03:59:36,842 INFO L226 Difference]: Without dead ends: 1889 [2022-02-10 03:59:36,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1272 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=730, Invalid=3560, Unknown=0, NotChecked=0, Total=4290 [2022-02-10 03:59:36,843 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 203 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-10 03:59:36,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 272 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 769 Invalid, 0 Unknown, 165 Unchecked, 0.4s Time] [2022-02-10 03:59:36,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1889 states. [2022-02-10 03:59:36,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1889 to 1498. [2022-02-10 03:59:36,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1498 states, 1497 states have (on average 2.282565130260521) internal successors, (3417), 1497 states have internal predecessors, (3417), 0 states have call successors, (0), 0 states 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 03:59:36,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1498 states to 1498 states and 3417 transitions. [2022-02-10 03:59:36,862 INFO L78 Accepts]: Start accepts. Automaton has 1498 states and 3417 transitions. Word has length 26 [2022-02-10 03:59:36,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:59:36,862 INFO L470 AbstractCegarLoop]: Abstraction has 1498 states and 3417 transitions. [2022-02-10 03:59:36,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 27 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 03:59:36,862 INFO L276 IsEmpty]: Start isEmpty. Operand 1498 states and 3417 transitions. [2022-02-10 03:59:36,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:59:36,864 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:59:36,864 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 03:59:36,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-02-10 03:59:37,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-02-10 03:59:37,064 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:59:37,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:59:37,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1110352866, now seen corresponding path program 21 times [2022-02-10 03:59:37,065 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:59:37,065 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956381851] [2022-02-10 03:59:37,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:59:37,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:59:37,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:59:37,266 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 03:59:37,266 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:59:37,266 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956381851] [2022-02-10 03:59:37,266 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956381851] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:59:37,266 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555000686] [2022-02-10 03:59:37,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:59:37,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:59:37,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:59:37,268 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:59:37,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-02-10 03:59:37,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:59:37,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:59:37,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-10 03:59:37,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:59:37,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:59:37,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:59:37,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:59:37,536 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:59:37,536 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 32 treesize of output 52 [2022-02-10 03:59:37,612 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 03:59:37,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:59:37,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:59:37,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:59:37,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:59:37,742 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:59:37,743 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 22 treesize of output 41 [2022-02-10 03:59:37,855 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 03:59:37,856 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555000686] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:59:37,856 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:59:37,856 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-02-10 03:59:37,856 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428530328] [2022-02-10 03:59:37,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:59:37,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-10 03:59:37,856 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:59:37,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-10 03:59:37,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2022-02-10 03:59:37,857 INFO L87 Difference]: Start difference. First operand 1498 states and 3417 transitions. Second operand has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 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 03:59:38,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:59:38,540 INFO L93 Difference]: Finished difference Result 1720 states and 3846 transitions. [2022-02-10 03:59:38,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-10 03:59:38,541 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 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 03:59:38,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:59:38,544 INFO L225 Difference]: With dead ends: 1720 [2022-02-10 03:59:38,544 INFO L226 Difference]: Without dead ends: 1708 [2022-02-10 03:59:38,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=350, Invalid=1720, Unknown=0, NotChecked=0, Total=2070 [2022-02-10 03:59:38,545 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 119 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 1057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 380 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:59:38,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 126 Invalid, 1057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 659 Invalid, 0 Unknown, 380 Unchecked, 0.3s Time] [2022-02-10 03:59:38,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1708 states. [2022-02-10 03:59:38,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1708 to 1503. [2022-02-10 03:59:38,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1503 states, 1502 states have (on average 2.280958721704394) internal successors, (3426), 1502 states have internal predecessors, (3426), 0 states have call successors, (0), 0 states 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 03:59:38,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1503 states to 1503 states and 3426 transitions. [2022-02-10 03:59:38,565 INFO L78 Accepts]: Start accepts. Automaton has 1503 states and 3426 transitions. Word has length 26 [2022-02-10 03:59:38,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:59:38,565 INFO L470 AbstractCegarLoop]: Abstraction has 1503 states and 3426 transitions. [2022-02-10 03:59:38,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 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 03:59:38,566 INFO L276 IsEmpty]: Start isEmpty. Operand 1503 states and 3426 transitions. [2022-02-10 03:59:38,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:59:38,567 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:59:38,567 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 03:59:38,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-02-10 03:59:38,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:59:38,783 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:59:38,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:59:38,784 INFO L85 PathProgramCache]: Analyzing trace with hash 278449630, now seen corresponding path program 29 times [2022-02-10 03:59:38,784 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:59:38,784 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544912784] [2022-02-10 03:59:38,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:59:38,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:59:38,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:59:38,951 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 03:59:38,952 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:59:38,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544912784] [2022-02-10 03:59:38,952 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544912784] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:59:38,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260002253] [2022-02-10 03:59:38,952 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:59:38,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:59:38,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:59:38,953 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:59:38,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-02-10 03:59:38,974 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 03:59:38,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:59:38,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-10 03:59:38,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:59:39,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:59:39,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:59:39,292 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 25 treesize of output 17 [2022-02-10 03:59:39,333 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 03:59:39,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:59:39,505 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-10 03:59:39,505 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 21 treesize of output 56 [2022-02-10 03:59:39,641 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:59:39,643 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:59:39,655 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:59:39,655 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 20 treesize of output 47 [2022-02-10 03:59:39,929 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 03:59:39,929 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260002253] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:59:39,929 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:59:39,929 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-02-10 03:59:39,929 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701529271] [2022-02-10 03:59:39,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:59:39,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:59:39,929 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:59:39,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:59:39,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:59:39,930 INFO L87 Difference]: Start difference. First operand 1503 states and 3426 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 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 03:59:40,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:59:40,798 INFO L93 Difference]: Finished difference Result 1986 states and 4334 transitions. [2022-02-10 03:59:40,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-10 03:59:40,798 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 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 03:59:40,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:59:40,801 INFO L225 Difference]: With dead ends: 1986 [2022-02-10 03:59:40,801 INFO L226 Difference]: Without dead ends: 1980 [2022-02-10 03:59:40,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=289, Invalid=1517, Unknown=0, NotChecked=0, Total=1806 [2022-02-10 03:59:40,802 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 125 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 846 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 1016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-10 03:59:40,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 201 Invalid, 1016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 846 Invalid, 0 Unknown, 141 Unchecked, 0.4s Time] [2022-02-10 03:59:40,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1980 states. [2022-02-10 03:59:40,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1980 to 1503. [2022-02-10 03:59:40,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1503 states, 1502 states have (on average 2.280958721704394) internal successors, (3426), 1502 states have internal predecessors, (3426), 0 states have call successors, (0), 0 states 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 03:59:40,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1503 states to 1503 states and 3426 transitions. [2022-02-10 03:59:40,822 INFO L78 Accepts]: Start accepts. Automaton has 1503 states and 3426 transitions. Word has length 26 [2022-02-10 03:59:40,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:59:40,822 INFO L470 AbstractCegarLoop]: Abstraction has 1503 states and 3426 transitions. [2022-02-10 03:59:40,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 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 03:59:40,822 INFO L276 IsEmpty]: Start isEmpty. Operand 1503 states and 3426 transitions. [2022-02-10 03:59:40,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:59:40,824 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:59:40,824 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 03:59:40,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-02-10 03:59:41,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-02-10 03:59:41,025 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:59:41,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:59:41,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1662230250, now seen corresponding path program 30 times [2022-02-10 03:59:41,025 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:59:41,025 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582059969] [2022-02-10 03:59:41,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:59:41,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:59:41,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:59:41,213 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 03:59:41,213 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:59:41,213 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582059969] [2022-02-10 03:59:41,213 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582059969] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:59:41,213 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638251032] [2022-02-10 03:59:41,213 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:59:41,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:59:41,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:59:41,214 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:59:41,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-02-10 03:59:41,237 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 03:59:41,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:59:41,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-10 03:59:41,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:59:41,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:59:41,561 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:59:41,561 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 26 treesize of output 34 [2022-02-10 03:59:41,712 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 03:59:41,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:59:41,861 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:59:41,861 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 38 treesize of output 71 [2022-02-10 03:59:42,729 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 03:59:42,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638251032] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:59:42,729 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:59:42,729 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-10 03:59:42,730 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514350061] [2022-02-10 03:59:42,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:59:42,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:59:42,730 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:59:42,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:59:42,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:59:42,730 INFO L87 Difference]: Start difference. First operand 1503 states and 3426 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:59:44,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:59:44,659 INFO L93 Difference]: Finished difference Result 2141 states and 4612 transitions. [2022-02-10 03:59:44,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-10 03:59:44,660 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:59:44,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:59:44,663 INFO L225 Difference]: With dead ends: 2141 [2022-02-10 03:59:44,663 INFO L226 Difference]: Without dead ends: 2129 [2022-02-10 03:59:44,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 914 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=623, Invalid=2347, Unknown=0, NotChecked=0, Total=2970 [2022-02-10 03:59:44,664 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 225 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:59:44,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 178 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 502 Invalid, 0 Unknown, 178 Unchecked, 0.3s Time] [2022-02-10 03:59:44,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2129 states. [2022-02-10 03:59:44,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2129 to 1519. [2022-02-10 03:59:44,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 1518 states have (on average 2.2839262187088276) internal successors, (3467), 1518 states have internal predecessors, (3467), 0 states have call successors, (0), 0 states 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 03:59:44,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 3467 transitions. [2022-02-10 03:59:44,684 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 3467 transitions. Word has length 26 [2022-02-10 03:59:44,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:59:44,684 INFO L470 AbstractCegarLoop]: Abstraction has 1519 states and 3467 transitions. [2022-02-10 03:59:44,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:59:44,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 3467 transitions. [2022-02-10 03:59:44,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:59:44,686 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:59:44,686 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 03:59:44,712 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-02-10 03:59:44,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:59:44,899 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:59:44,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:59:44,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1784114574, now seen corresponding path program 31 times [2022-02-10 03:59:44,900 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:59:44,900 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820650233] [2022-02-10 03:59:44,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:59:44,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:59:44,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:59:45,112 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 03:59:45,113 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:59:45,113 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820650233] [2022-02-10 03:59:45,113 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820650233] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:59:45,113 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460353420] [2022-02-10 03:59:45,113 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:59:45,113 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:59:45,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:59:45,114 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:59:45,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-02-10 03:59:45,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:59:45,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-10 03:59:45,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:59:45,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:59:45,466 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:59:45,466 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 29 treesize of output 21 [2022-02-10 03:59:45,504 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 03:59:45,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:59:45,697 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-10 03:59:45,697 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 21 treesize of output 56 [2022-02-10 03:59:46,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:59:46,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:59:46,149 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:59:46,149 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 20 treesize of output 47 [2022-02-10 03:59:46,593 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 03:59:46,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460353420] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:59:46,593 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:59:46,593 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-02-10 03:59:46,593 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060174018] [2022-02-10 03:59:46,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:59:46,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:59:46,594 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:59:46,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:59:46,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:59:46,594 INFO L87 Difference]: Start difference. First operand 1519 states and 3467 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:59:47,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:59:47,988 INFO L93 Difference]: Finished difference Result 2073 states and 4527 transitions. [2022-02-10 03:59:47,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-10 03:59:47,989 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:59:47,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:59:47,992 INFO L225 Difference]: With dead ends: 2073 [2022-02-10 03:59:47,992 INFO L226 Difference]: Without dead ends: 2066 [2022-02-10 03:59:47,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=454, Invalid=2302, Unknown=0, NotChecked=0, Total=2756 [2022-02-10 03:59:47,993 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 155 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:59:47,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 160 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 03:59:47,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2066 states. [2022-02-10 03:59:48,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2066 to 1519. [2022-02-10 03:59:48,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 1518 states have (on average 2.2839262187088276) internal successors, (3467), 1518 states have internal predecessors, (3467), 0 states have call successors, (0), 0 states 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 03:59:48,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 3467 transitions. [2022-02-10 03:59:48,011 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 3467 transitions. Word has length 26 [2022-02-10 03:59:48,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:59:48,011 INFO L470 AbstractCegarLoop]: Abstraction has 1519 states and 3467 transitions. [2022-02-10 03:59:48,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:59:48,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 3467 transitions. [2022-02-10 03:59:48,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:59:48,013 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:59:48,013 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 03:59:48,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-02-10 03:59:48,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-02-10 03:59:48,214 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:59:48,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:59:48,215 INFO L85 PathProgramCache]: Analyzing trace with hash -861233066, now seen corresponding path program 32 times [2022-02-10 03:59:48,215 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:59:48,215 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793363672] [2022-02-10 03:59:48,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:59:48,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:59:48,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:59:48,514 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 03:59:48,514 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:59:48,514 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793363672] [2022-02-10 03:59:48,514 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793363672] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:59:48,514 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449104830] [2022-02-10 03:59:48,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:59:48,514 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:59:48,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:59:48,515 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:59:48,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-02-10 03:59:48,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:59:48,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:59:48,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-10 03:59:48,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:59:48,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:59:48,934 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:59:48,934 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 20 treesize of output 20 [2022-02-10 03:59:49,005 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 03:59:49,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:59:49,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:59:49,175 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:59:49,175 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 20 treesize of output 55 [2022-02-10 03:59:49,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:59:49,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:59:49,449 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:59:49,450 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 20 treesize of output 47 [2022-02-10 03:59:49,878 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 03:59:49,878 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449104830] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:59:49,878 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:59:49,878 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-10 03:59:49,878 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959821875] [2022-02-10 03:59:49,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:59:49,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-10 03:59:49,878 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:59:49,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-10 03:59:49,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2022-02-10 03:59:49,879 INFO L87 Difference]: Start difference. First operand 1519 states and 3467 transitions. Second operand has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:59:51,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:59:51,283 INFO L93 Difference]: Finished difference Result 1915 states and 4173 transitions. [2022-02-10 03:59:51,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-10 03:59:51,283 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:59:51,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:59:51,286 INFO L225 Difference]: With dead ends: 1915 [2022-02-10 03:59:51,286 INFO L226 Difference]: Without dead ends: 1903 [2022-02-10 03:59:51,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=515, Invalid=2241, Unknown=0, NotChecked=0, Total=2756 [2022-02-10 03:59:51,287 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 233 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:59:51,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 121 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 505 Invalid, 0 Unknown, 108 Unchecked, 0.3s Time] [2022-02-10 03:59:51,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1903 states. [2022-02-10 03:59:51,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1903 to 1524. [2022-02-10 03:59:51,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1524 states, 1523 states have (on average 2.281680892974393) internal successors, (3475), 1523 states have internal predecessors, (3475), 0 states have call successors, (0), 0 states 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 03:59:51,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1524 states to 1524 states and 3475 transitions. [2022-02-10 03:59:51,307 INFO L78 Accepts]: Start accepts. Automaton has 1524 states and 3475 transitions. Word has length 26 [2022-02-10 03:59:51,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:59:51,307 INFO L470 AbstractCegarLoop]: Abstraction has 1524 states and 3475 transitions. [2022-02-10 03:59:51,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:59:51,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1524 states and 3475 transitions. [2022-02-10 03:59:51,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:59:51,308 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:59:51,309 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 03:59:51,327 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-02-10 03:59:51,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-02-10 03:59:51,509 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:59:51,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:59:51,509 INFO L85 PathProgramCache]: Analyzing trace with hash 166339530, now seen corresponding path program 33 times [2022-02-10 03:59:51,509 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:59:51,509 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798530571] [2022-02-10 03:59:51,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:59:51,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:59:51,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:59:51,696 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 03:59:51,696 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:59:51,696 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798530571] [2022-02-10 03:59:51,697 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798530571] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:59:51,697 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175185768] [2022-02-10 03:59:51,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:59:51,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:59:51,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:59:51,698 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:59:51,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-02-10 03:59:51,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:59:51,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:59:51,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-10 03:59:51,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:59:52,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:59:52,056 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:59:52,056 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 24 treesize of output 24 [2022-02-10 03:59:52,121 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 03:59:52,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:59:52,326 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-10 03:59:52,326 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 21 treesize of output 56 [2022-02-10 03:59:52,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:59:52,542 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:59:52,557 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:59:52,558 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 20 treesize of output 47 [2022-02-10 03:59:52,956 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 03:59:52,956 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175185768] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:59:52,956 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:59:52,956 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-02-10 03:59:52,956 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162764774] [2022-02-10 03:59:52,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:59:52,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:59:52,957 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:59:52,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:59:52,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:59:52,957 INFO L87 Difference]: Start difference. First operand 1524 states and 3475 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:59:54,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:59:54,738 INFO L93 Difference]: Finished difference Result 1995 states and 4355 transitions. [2022-02-10 03:59:54,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-10 03:59:54,738 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:59:54,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:59:54,741 INFO L225 Difference]: With dead ends: 1995 [2022-02-10 03:59:54,741 INFO L226 Difference]: Without dead ends: 1988 [2022-02-10 03:59:54,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 995 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=566, Invalid=3094, Unknown=0, NotChecked=0, Total=3660 [2022-02-10 03:59:54,742 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 190 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 1037 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-10 03:59:54,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 201 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1037 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-10 03:59:54,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1988 states. [2022-02-10 03:59:54,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1988 to 1524. [2022-02-10 03:59:54,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1524 states, 1523 states have (on average 2.2803676953381484) internal successors, (3473), 1523 states have internal predecessors, (3473), 0 states have call successors, (0), 0 states 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 03:59:54,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1524 states to 1524 states and 3473 transitions. [2022-02-10 03:59:54,758 INFO L78 Accepts]: Start accepts. Automaton has 1524 states and 3473 transitions. Word has length 26 [2022-02-10 03:59:54,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:59:54,758 INFO L470 AbstractCegarLoop]: Abstraction has 1524 states and 3473 transitions. [2022-02-10 03:59:54,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:59:54,758 INFO L276 IsEmpty]: Start isEmpty. Operand 1524 states and 3473 transitions. [2022-02-10 03:59:54,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:59:54,759 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:59:54,760 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 03:59:54,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-02-10 03:59:54,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:59:54,967 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:59:54,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:59:54,967 INFO L85 PathProgramCache]: Analyzing trace with hash -989713842, now seen corresponding path program 34 times [2022-02-10 03:59:54,967 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:59:54,967 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128462024] [2022-02-10 03:59:54,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:59:54,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:59:54,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:59:55,177 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 03:59:55,177 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:59:55,178 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128462024] [2022-02-10 03:59:55,178 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128462024] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:59:55,178 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245004764] [2022-02-10 03:59:55,178 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:59:55,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:59:55,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:59:55,179 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:59:55,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-02-10 03:59:55,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:59:55,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:59:55,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-10 03:59:55,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:59:55,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:59:55,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:59:55,524 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:59:55,524 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 38 treesize of output 34 [2022-02-10 03:59:55,612 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 03:59:55,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:59:55,836 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-02-10 03:59:55,836 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 21 treesize of output 56 [2022-02-10 03:59:56,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:59:56,054 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:59:56,069 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:59:56,069 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 20 treesize of output 47 [2022-02-10 03:59:56,427 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 03:59:56,427 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245004764] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:59:56,427 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:59:56,427 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-02-10 03:59:56,427 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128644647] [2022-02-10 03:59:56,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:59:56,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-10 03:59:56,427 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:59:56,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-10 03:59:56,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2022-02-10 03:59:56,428 INFO L87 Difference]: Start difference. First operand 1524 states and 3473 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:59:58,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:59:58,164 INFO L93 Difference]: Finished difference Result 2151 states and 4645 transitions. [2022-02-10 03:59:58,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-10 03:59:58,165 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 03:59:58,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:59:58,168 INFO L225 Difference]: With dead ends: 2151 [2022-02-10 03:59:58,168 INFO L226 Difference]: Without dead ends: 2127 [2022-02-10 03:59:58,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=548, Invalid=2644, Unknown=0, NotChecked=0, Total=3192 [2022-02-10 03:59:58,169 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 239 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 1071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-10 03:59:58,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 179 Invalid, 1071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1020 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-10 03:59:58,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2127 states. [2022-02-10 03:59:58,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2127 to 1528. [2022-02-10 03:59:58,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1528 states, 1527 states have (on average 2.280943025540275) internal successors, (3483), 1527 states have internal predecessors, (3483), 0 states have call successors, (0), 0 states 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 03:59:58,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1528 states to 1528 states and 3483 transitions. [2022-02-10 03:59:58,189 INFO L78 Accepts]: Start accepts. Automaton has 1528 states and 3483 transitions. Word has length 26 [2022-02-10 03:59:58,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:59:58,189 INFO L470 AbstractCegarLoop]: Abstraction has 1528 states and 3483 transitions. [2022-02-10 03:59:58,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:59:58,189 INFO L276 IsEmpty]: Start isEmpty. Operand 1528 states and 3483 transitions. [2022-02-10 03:59:58,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 03:59:58,191 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:59:58,191 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 03:59:58,213 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-02-10 03:59:58,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:59:58,392 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 03:59:58,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:59:58,392 INFO L85 PathProgramCache]: Analyzing trace with hash 2077320222, now seen corresponding path program 22 times [2022-02-10 03:59:58,392 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:59:58,392 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660240959] [2022-02-10 03:59:58,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:59:58,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:59:58,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:59:58,798 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 03:59:58,798 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:59:58,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660240959] [2022-02-10 03:59:58,798 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660240959] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:59:58,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543936624] [2022-02-10 03:59:58,798 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:59:58,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:59:58,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:59:58,800 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:59:58,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-02-10 03:59:58,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:59:58,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:59:58,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-10 03:59:58,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:59:59,399 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-10 03:59:59,474 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 03:59:59,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:59:59,611 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-10 03:59:59,612 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 22 treesize of output 47 [2022-02-10 03:59:59,943 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 03:59:59,943 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543936624] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:59:59,943 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:59:59,944 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 22 [2022-02-10 03:59:59,944 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699574497] [2022-02-10 03:59:59,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:59:59,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-10 03:59:59,944 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:59:59,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-10 03:59:59,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-02-10 03:59:59,944 INFO L87 Difference]: Start difference. First operand 1528 states and 3483 transitions. Second operand has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:00:00,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:00:00,298 INFO L93 Difference]: Finished difference Result 1565 states and 3537 transitions. [2022-02-10 04:00:00,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 04:00:00,299 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-02-10 04:00:00,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:00:00,301 INFO L225 Difference]: With dead ends: 1565 [2022-02-10 04:00:00,301 INFO L226 Difference]: Without dead ends: 1560 [2022-02-10 04:00:00,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=183, Invalid=873, Unknown=0, NotChecked=0, Total=1056 [2022-02-10 04:00:00,301 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 75 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 04:00:00,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 123 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 309 Invalid, 0 Unknown, 67 Unchecked, 0.1s Time] [2022-02-10 04:00:00,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1560 states. [2022-02-10 04:00:00,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1560 to 1531. [2022-02-10 04:00:00,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1531 states, 1530 states have (on average 2.281045751633987) internal successors, (3490), 1530 states have internal predecessors, (3490), 0 states have call successors, (0), 0 states 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 04:00:00,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 3490 transitions. [2022-02-10 04:00:00,317 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 3490 transitions. Word has length 26 [2022-02-10 04:00:00,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:00:00,317 INFO L470 AbstractCegarLoop]: Abstraction has 1531 states and 3490 transitions. [2022-02-10 04:00:00,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:00:00,317 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 3490 transitions. [2022-02-10 04:00:00,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 04:00:00,318 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:00:00,319 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 04:00:00,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-02-10 04:00:00,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:00:00,534 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:00:00,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:00:00,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1501309406, now seen corresponding path program 23 times [2022-02-10 04:00:00,534 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:00:00,534 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601602540] [2022-02-10 04:00:00,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:00:00,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:00:00,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:00:00,844 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 04:00:00,845 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:00:00,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601602540] [2022-02-10 04:00:00,845 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601602540] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:00:00,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281887740] [2022-02-10 04:00:00,845 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 04:00:00,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:00:00,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:00:00,846 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:00:00,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-02-10 04:00:00,866 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 04:00:00,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 04:00:00,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-10 04:00:00,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:00:01,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-02-10 04:00:01,194 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 04:00:01,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:00:01,323 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-10 04:00:01,324 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 22 treesize of output 47 [2022-02-10 04:00:01,642 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 04:00:01,642 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281887740] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:00:01,642 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:00:01,642 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-02-10 04:00:01,642 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367007028] [2022-02-10 04:00:01,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:00:01,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-10 04:00:01,642 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:00:01,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-10 04:00:01,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2022-02-10 04:00:01,643 INFO L87 Difference]: Start difference. First operand 1531 states and 3490 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 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 04:00:02,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:00:02,416 INFO L93 Difference]: Finished difference Result 1861 states and 4166 transitions. [2022-02-10 04:00:02,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-10 04:00:02,418 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 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 04:00:02,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:00:02,421 INFO L225 Difference]: With dead ends: 1861 [2022-02-10 04:00:02,421 INFO L226 Difference]: Without dead ends: 1843 [2022-02-10 04:00:02,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=301, Invalid=1591, Unknown=0, NotChecked=0, Total=1892 [2022-02-10 04:00:02,421 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 131 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 04:00:02,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 136 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 04:00:02,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1843 states. [2022-02-10 04:00:02,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1843 to 1537. [2022-02-10 04:00:02,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1537 states, 1536 states have (on average 2.279296875) internal successors, (3501), 1536 states have internal predecessors, (3501), 0 states have call successors, (0), 0 states 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 04:00:02,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1537 states to 1537 states and 3501 transitions. [2022-02-10 04:00:02,439 INFO L78 Accepts]: Start accepts. Automaton has 1537 states and 3501 transitions. Word has length 26 [2022-02-10 04:00:02,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:00:02,439 INFO L470 AbstractCegarLoop]: Abstraction has 1537 states and 3501 transitions. [2022-02-10 04:00:02,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 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 04:00:02,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1537 states and 3501 transitions. [2022-02-10 04:00:02,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-10 04:00:02,441 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:00:02,441 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 04:00:02,458 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-02-10 04:00:02,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-02-10 04:00:02,642 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:00:02,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:00:02,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1330432786, now seen corresponding path program 24 times [2022-02-10 04:00:02,642 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:00:02,642 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631636827] [2022-02-10 04:00:02,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:00:02,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:00:02,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:00:03,091 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 04:00:03,091 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:00:03,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631636827] [2022-02-10 04:00:03,091 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631636827] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:00:03,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38455832] [2022-02-10 04:00:03,091 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 04:00:03,092 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:00:03,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:00:03,093 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:00:03,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-02-10 04:00:03,115 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-10 04:00:03,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 04:00:03,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-10 04:00:03,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:00:03,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-02-10 04:00:03,513 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 04:00:03,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:00:03,609 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-10 04:00:03,609 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 22 treesize of output 47 [2022-02-10 04:00:03,813 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 04:00:03,813 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38455832] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:00:03,813 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:00:03,813 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-02-10 04:00:03,814 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461146669] [2022-02-10 04:00:03,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:00:03,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-10 04:00:03,814 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:00:03,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-10 04:00:03,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2022-02-10 04:00:03,814 INFO L87 Difference]: Start difference. First operand 1537 states and 3501 transitions. Second operand has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 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 04:00:05,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:00:05,106 INFO L93 Difference]: Finished difference Result 1978 states and 4463 transitions. [2022-02-10 04:00:05,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-10 04:00:05,106 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 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 04:00:05,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:00:05,109 INFO L225 Difference]: With dead ends: 1978 [2022-02-10 04:00:05,109 INFO L226 Difference]: Without dead ends: 1966 [2022-02-10 04:00:05,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 967 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=516, Invalid=2676, Unknown=0, NotChecked=0, Total=3192 [2022-02-10 04:00:05,110 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 130 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 04:00:05,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 167 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 693 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 04:00:05,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1966 states. [2022-02-10 04:00:05,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1966 to 1541. [2022-02-10 04:00:05,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1541 states, 1540 states have (on average 2.277922077922078) internal successors, (3508), 1540 states have internal predecessors, (3508), 0 states have call successors, (0), 0 states 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 04:00:05,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1541 states to 1541 states and 3508 transitions. [2022-02-10 04:00:05,131 INFO L78 Accepts]: Start accepts. Automaton has 1541 states and 3508 transitions. Word has length 26 [2022-02-10 04:00:05,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:00:05,131 INFO L470 AbstractCegarLoop]: Abstraction has 1541 states and 3508 transitions. [2022-02-10 04:00:05,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 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 04:00:05,131 INFO L276 IsEmpty]: Start isEmpty. Operand 1541 states and 3508 transitions. [2022-02-10 04:00:05,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-10 04:00:05,133 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:00:05,133 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 04:00:05,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-02-10 04:00:05,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-02-10 04:00:05,334 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:00:05,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:00:05,334 INFO L85 PathProgramCache]: Analyzing trace with hash -39591056, now seen corresponding path program 35 times [2022-02-10 04:00:05,334 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:00:05,334 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858574328] [2022-02-10 04:00:05,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:00:05,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:00:05,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:00:05,405 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:05,405 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:00:05,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858574328] [2022-02-10 04:00:05,405 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858574328] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:00:05,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535763599] [2022-02-10 04:00:05,405 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 04:00:05,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:00:05,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:00:05,408 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:00:05,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-02-10 04:00:05,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 04:00:05,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 04:00:05,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 04:00:05,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:00:05,583 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:05,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:00:05,732 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:05,733 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535763599] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:00:05,733 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:00:05,733 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-10 04:00:05,733 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63728095] [2022-02-10 04:00:05,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:00:05,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 04:00:05,733 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:00:05,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 04:00:05,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-02-10 04:00:05,734 INFO L87 Difference]: Start difference. First operand 1541 states and 3508 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:00:07,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:00:07,806 INFO L93 Difference]: Finished difference Result 3620 states and 7356 transitions. [2022-02-10 04:00:07,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-02-10 04:00:07,806 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-10 04:00:07,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:00:07,811 INFO L225 Difference]: With dead ends: 3620 [2022-02-10 04:00:07,811 INFO L226 Difference]: Without dead ends: 3620 [2022-02-10 04:00:07,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5608 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2680, Invalid=11362, Unknown=0, NotChecked=0, Total=14042 [2022-02-10 04:00:07,814 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 484 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 1623 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 1749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-10 04:00:07,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [484 Valid, 596 Invalid, 1749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1623 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-10 04:00:07,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3620 states. [2022-02-10 04:00:07,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3620 to 1785. [2022-02-10 04:00:07,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1785 states, 1784 states have (on average 2.3492152466367715) internal successors, (4191), 1784 states have internal predecessors, (4191), 0 states have call successors, (0), 0 states 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 04:00:07,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1785 states to 1785 states and 4191 transitions. [2022-02-10 04:00:07,846 INFO L78 Accepts]: Start accepts. Automaton has 1785 states and 4191 transitions. Word has length 28 [2022-02-10 04:00:07,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:00:07,847 INFO L470 AbstractCegarLoop]: Abstraction has 1785 states and 4191 transitions. [2022-02-10 04:00:07,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:00:07,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1785 states and 4191 transitions. [2022-02-10 04:00:07,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-10 04:00:07,849 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:00:07,849 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 04:00:07,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-02-10 04:00:08,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:00:08,049 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:00:08,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:00:08,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1889338640, now seen corresponding path program 25 times [2022-02-10 04:00:08,050 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:00:08,050 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360742314] [2022-02-10 04:00:08,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:00:08,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:00:08,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:00:08,099 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:08,100 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:00:08,100 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360742314] [2022-02-10 04:00:08,100 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360742314] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:00:08,100 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933413929] [2022-02-10 04:00:08,100 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 04:00:08,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:00:08,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:00:08,101 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:00:08,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-02-10 04:00:08,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:00:08,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 04:00:08,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:00:08,233 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:08,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:00:08,339 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:08,340 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933413929] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:00:08,340 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:00:08,340 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-10 04:00:08,340 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298860217] [2022-02-10 04:00:08,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:00:08,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 04:00:08,340 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:00:08,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 04:00:08,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-02-10 04:00:08,341 INFO L87 Difference]: Start difference. First operand 1785 states and 4191 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states 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 04:00:09,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:00:09,371 INFO L93 Difference]: Finished difference Result 4023 states and 8552 transitions. [2022-02-10 04:00:09,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-02-10 04:00:09,372 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-10 04:00:09,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:00:09,377 INFO L225 Difference]: With dead ends: 4023 [2022-02-10 04:00:09,377 INFO L226 Difference]: Without dead ends: 4023 [2022-02-10 04:00:09,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2229 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1231, Invalid=5249, Unknown=0, NotChecked=0, Total=6480 [2022-02-10 04:00:09,378 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 418 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-10 04:00:09,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 364 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 881 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-10 04:00:09,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4023 states. [2022-02-10 04:00:09,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4023 to 1841. [2022-02-10 04:00:09,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1840 states have (on average 2.3342391304347827) internal successors, (4295), 1840 states have internal predecessors, (4295), 0 states have call successors, (0), 0 states 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 04:00:09,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 4295 transitions. [2022-02-10 04:00:09,410 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 4295 transitions. Word has length 28 [2022-02-10 04:00:09,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:00:09,411 INFO L470 AbstractCegarLoop]: Abstraction has 1841 states and 4295 transitions. [2022-02-10 04:00:09,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states 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 04:00:09,411 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 4295 transitions. [2022-02-10 04:00:09,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-10 04:00:09,413 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:00:09,413 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 04:00:09,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-02-10 04:00:09,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:00:09,629 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:00:09,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:00:09,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1289099312, now seen corresponding path program 36 times [2022-02-10 04:00:09,629 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:00:09,629 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138147257] [2022-02-10 04:00:09,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:00:09,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:00:09,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:00:09,669 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:09,669 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:00:09,669 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138147257] [2022-02-10 04:00:09,669 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138147257] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:00:09,669 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63440361] [2022-02-10 04:00:09,669 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 04:00:09,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:00:09,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:00:09,670 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:00:09,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-02-10 04:00:09,694 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 04:00:09,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 04:00:09,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 04:00:09,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:00:09,818 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:09,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:00:09,970 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:09,970 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63440361] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:00:09,970 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:00:09,970 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-02-10 04:00:09,971 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645508349] [2022-02-10 04:00:09,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:00:09,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-10 04:00:09,971 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:00:09,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-10 04:00:09,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2022-02-10 04:00:09,972 INFO L87 Difference]: Start difference. First operand 1841 states and 4295 transitions. Second operand has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:00:13,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:00:13,686 INFO L93 Difference]: Finished difference Result 4980 states and 9961 transitions. [2022-02-10 04:00:13,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2022-02-10 04:00:13,687 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-10 04:00:13,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:00:13,695 INFO L225 Difference]: With dead ends: 4980 [2022-02-10 04:00:13,695 INFO L226 Difference]: Without dead ends: 4980 [2022-02-10 04:00:13,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17220 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=7033, Invalid=31579, Unknown=0, NotChecked=0, Total=38612 [2022-02-10 04:00:13,700 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 848 mSDsluCounter, 981 mSDsCounter, 0 mSdLazyCounter, 1920 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 2132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 1920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-10 04:00:13,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [848 Valid, 629 Invalid, 2132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 1920 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-10 04:00:13,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4980 states. [2022-02-10 04:00:13,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4980 to 1859. [2022-02-10 04:00:13,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1859 states, 1858 states have (on average 2.3347685683530677) internal successors, (4338), 1858 states have internal predecessors, (4338), 0 states have call successors, (0), 0 states 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 04:00:13,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1859 states to 1859 states and 4338 transitions. [2022-02-10 04:00:13,748 INFO L78 Accepts]: Start accepts. Automaton has 1859 states and 4338 transitions. Word has length 28 [2022-02-10 04:00:13,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:00:13,748 INFO L470 AbstractCegarLoop]: Abstraction has 1859 states and 4338 transitions. [2022-02-10 04:00:13,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:00:13,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1859 states and 4338 transitions. [2022-02-10 04:00:13,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-10 04:00:13,750 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:00:13,751 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 04:00:13,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-02-10 04:00:13,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:00:13,965 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:00:13,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:00:13,965 INFO L85 PathProgramCache]: Analyzing trace with hash -232014156, now seen corresponding path program 37 times [2022-02-10 04:00:13,965 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:00:13,965 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441118285] [2022-02-10 04:00:13,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:00:13,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:00:13,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:00:14,024 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 04:00:14,025 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:00:14,025 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441118285] [2022-02-10 04:00:14,025 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441118285] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:00:14,025 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668573765] [2022-02-10 04:00:14,025 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 04:00:14,025 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:00:14,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:00:14,026 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:00:14,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-02-10 04:00:14,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:00:14,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-10 04:00:14,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:00:14,128 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 04:00:14,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:00:14,648 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 04:00:14,648 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668573765] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:00:14,648 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:00:14,648 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-02-10 04:00:14,648 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288781846] [2022-02-10 04:00:14,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:00:14,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-10 04:00:14,649 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:00:14,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-10 04:00:14,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2022-02-10 04:00:14,655 INFO L87 Difference]: Start difference. First operand 1859 states and 4338 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:00:14,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:00:14,848 INFO L93 Difference]: Finished difference Result 3209 states and 7124 transitions. [2022-02-10 04:00:14,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-10 04:00:14,848 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-10 04:00:14,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:00:14,853 INFO L225 Difference]: With dead ends: 3209 [2022-02-10 04:00:14,853 INFO L226 Difference]: Without dead ends: 3206 [2022-02-10 04:00:14,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2022-02-10 04:00:14,854 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 297 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 04:00:14,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 57 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 04:00:14,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3206 states. [2022-02-10 04:00:14,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3206 to 2351. [2022-02-10 04:00:14,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2351 states, 2350 states have (on average 2.4191489361702128) internal successors, (5685), 2350 states have internal predecessors, (5685), 0 states have call successors, (0), 0 states 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 04:00:14,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2351 states to 2351 states and 5685 transitions. [2022-02-10 04:00:14,887 INFO L78 Accepts]: Start accepts. Automaton has 2351 states and 5685 transitions. Word has length 28 [2022-02-10 04:00:14,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:00:14,887 INFO L470 AbstractCegarLoop]: Abstraction has 2351 states and 5685 transitions. [2022-02-10 04:00:14,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:00:14,888 INFO L276 IsEmpty]: Start isEmpty. Operand 2351 states and 5685 transitions. [2022-02-10 04:00:14,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-10 04:00:14,891 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:00:14,891 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 04:00:14,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-02-10 04:00:15,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:00:15,092 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:00:15,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:00:15,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1959416432, now seen corresponding path program 38 times [2022-02-10 04:00:15,092 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:00:15,092 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196520321] [2022-02-10 04:00:15,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:00:15,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:00:15,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:00:15,138 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:15,138 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:00:15,138 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196520321] [2022-02-10 04:00:15,138 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196520321] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:00:15,138 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509662497] [2022-02-10 04:00:15,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 04:00:15,142 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:00:15,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:00:15,143 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:00:15,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-02-10 04:00:15,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 04:00:15,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 04:00:15,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-10 04:00:15,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:00:15,268 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:15,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:00:15,365 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:15,366 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509662497] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:00:15,366 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:00:15,366 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-02-10 04:00:15,366 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370829467] [2022-02-10 04:00:15,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:00:15,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 04:00:15,366 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:00:15,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 04:00:15,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-02-10 04:00:15,367 INFO L87 Difference]: Start difference. First operand 2351 states and 5685 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:00:16,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:00:16,778 INFO L93 Difference]: Finished difference Result 4596 states and 9981 transitions. [2022-02-10 04:00:16,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-02-10 04:00:16,779 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-10 04:00:16,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:00:16,787 INFO L225 Difference]: With dead ends: 4596 [2022-02-10 04:00:16,787 INFO L226 Difference]: Without dead ends: 4584 [2022-02-10 04:00:16,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3662 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2193, Invalid=7313, Unknown=0, NotChecked=0, Total=9506 [2022-02-10 04:00:16,788 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 592 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-10 04:00:16,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [592 Valid, 181 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-10 04:00:16,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4584 states. [2022-02-10 04:00:16,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4584 to 2819. [2022-02-10 04:00:16,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2819 states, 2818 states have (on average 2.50638750887154) internal successors, (7063), 2818 states have internal predecessors, (7063), 0 states have call successors, (0), 0 states 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 04:00:16,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2819 states to 2819 states and 7063 transitions. [2022-02-10 04:00:16,846 INFO L78 Accepts]: Start accepts. Automaton has 2819 states and 7063 transitions. Word has length 28 [2022-02-10 04:00:16,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:00:16,846 INFO L470 AbstractCegarLoop]: Abstraction has 2819 states and 7063 transitions. [2022-02-10 04:00:16,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:00:16,847 INFO L276 IsEmpty]: Start isEmpty. Operand 2819 states and 7063 transitions. [2022-02-10 04:00:16,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-10 04:00:16,850 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:00:16,850 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 04:00:16,875 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-02-10 04:00:17,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-02-10 04:00:17,051 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:00:17,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:00:17,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1826518544, now seen corresponding path program 26 times [2022-02-10 04:00:17,051 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:00:17,051 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31977436] [2022-02-10 04:00:17,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:00:17,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:00:17,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:00:17,097 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:17,098 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:00:17,098 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31977436] [2022-02-10 04:00:17,098 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31977436] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:00:17,098 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638554603] [2022-02-10 04:00:17,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 04:00:17,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:00:17,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:00:17,099 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:00:17,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-02-10 04:00:17,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 04:00:17,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 04:00:17,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 04:00:17,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:00:17,242 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:17,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:00:17,300 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:17,300 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638554603] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:00:17,300 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:00:17,300 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-02-10 04:00:17,300 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862518307] [2022-02-10 04:00:17,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:00:17,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 04:00:17,301 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:00:17,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 04:00:17,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-02-10 04:00:17,301 INFO L87 Difference]: Start difference. First operand 2819 states and 7063 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:00:17,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:00:17,856 INFO L93 Difference]: Finished difference Result 5268 states and 12577 transitions. [2022-02-10 04:00:17,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-10 04:00:17,857 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-10 04:00:17,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:00:17,864 INFO L225 Difference]: With dead ends: 5268 [2022-02-10 04:00:17,865 INFO L226 Difference]: Without dead ends: 5248 [2022-02-10 04:00:17,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=579, Invalid=1773, Unknown=0, NotChecked=0, Total=2352 [2022-02-10 04:00:17,866 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 370 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 04:00:17,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 159 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 04:00:17,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5248 states. [2022-02-10 04:00:17,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5248 to 3799. [2022-02-10 04:00:17,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3799 states, 3798 states have (on average 2.528436018957346) internal successors, (9603), 3798 states have internal predecessors, (9603), 0 states have call successors, (0), 0 states 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 04:00:17,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3799 states to 3799 states and 9603 transitions. [2022-02-10 04:00:17,921 INFO L78 Accepts]: Start accepts. Automaton has 3799 states and 9603 transitions. Word has length 28 [2022-02-10 04:00:17,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:00:17,922 INFO L470 AbstractCegarLoop]: Abstraction has 3799 states and 9603 transitions. [2022-02-10 04:00:17,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:00:17,922 INFO L276 IsEmpty]: Start isEmpty. Operand 3799 states and 9603 transitions. [2022-02-10 04:00:17,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-10 04:00:17,926 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:00:17,927 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 04:00:17,950 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-02-10 04:00:18,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:00:18,127 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:00:18,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:00:18,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1886232332, now seen corresponding path program 39 times [2022-02-10 04:00:18,128 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:00:18,128 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442484551] [2022-02-10 04:00:18,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:00:18,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:00:18,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:00:18,161 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:18,161 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:00:18,161 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442484551] [2022-02-10 04:00:18,161 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442484551] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:00:18,161 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435311493] [2022-02-10 04:00:18,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 04:00:18,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:00:18,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:00:18,163 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:00:18,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-02-10 04:00:18,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 04:00:18,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 04:00:18,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-10 04:00:18,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:00:18,289 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:18,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:00:18,408 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:18,409 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435311493] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:00:18,409 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:00:18,409 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 14 [2022-02-10 04:00:18,409 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751266187] [2022-02-10 04:00:18,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:00:18,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-10 04:00:18,409 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:00:18,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-10 04:00:18,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2022-02-10 04:00:18,409 INFO L87 Difference]: Start difference. First operand 3799 states and 9603 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:00:18,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:00:18,831 INFO L93 Difference]: Finished difference Result 6057 states and 13843 transitions. [2022-02-10 04:00:18,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-10 04:00:18,831 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-10 04:00:18,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:00:18,842 INFO L225 Difference]: With dead ends: 6057 [2022-02-10 04:00:18,843 INFO L226 Difference]: Without dead ends: 6057 [2022-02-10 04:00:18,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=464, Invalid=868, Unknown=0, NotChecked=0, Total=1332 [2022-02-10 04:00:18,843 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 292 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 04:00:18,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 100 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 04:00:18,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6057 states. [2022-02-10 04:00:18,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6057 to 3404. [2022-02-10 04:00:18,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3404 states, 3403 states have (on average 2.5019100793417572) internal successors, (8514), 3403 states have internal predecessors, (8514), 0 states have call successors, (0), 0 states 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 04:00:18,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3404 states to 3404 states and 8514 transitions. [2022-02-10 04:00:18,917 INFO L78 Accepts]: Start accepts. Automaton has 3404 states and 8514 transitions. Word has length 28 [2022-02-10 04:00:18,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:00:18,917 INFO L470 AbstractCegarLoop]: Abstraction has 3404 states and 8514 transitions. [2022-02-10 04:00:18,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:00:18,917 INFO L276 IsEmpty]: Start isEmpty. Operand 3404 states and 8514 transitions. [2022-02-10 04:00:18,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-10 04:00:18,922 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:00:18,922 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 04:00:18,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-02-10 04:00:19,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-02-10 04:00:19,123 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:00:19,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:00:19,123 INFO L85 PathProgramCache]: Analyzing trace with hash -476253640, now seen corresponding path program 40 times [2022-02-10 04:00:19,123 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:00:19,123 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766128792] [2022-02-10 04:00:19,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:00:19,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:00:19,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:00:19,163 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:19,164 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:00:19,164 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766128792] [2022-02-10 04:00:19,164 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766128792] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:00:19,164 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623862584] [2022-02-10 04:00:19,164 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 04:00:19,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:00:19,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:00:19,165 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:00:19,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-02-10 04:00:19,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 04:00:19,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 04:00:19,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 04:00:19,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:00:19,280 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:19,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:00:19,379 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:19,380 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623862584] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:00:19,380 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:00:19,380 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 17 [2022-02-10 04:00:19,380 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075857510] [2022-02-10 04:00:19,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:00:19,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-10 04:00:19,380 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:00:19,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-10 04:00:19,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-02-10 04:00:19,380 INFO L87 Difference]: Start difference. First operand 3404 states and 8514 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:00:20,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:00:20,354 INFO L93 Difference]: Finished difference Result 6016 states and 13540 transitions. [2022-02-10 04:00:20,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-02-10 04:00:20,354 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-10 04:00:20,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:00:20,364 INFO L225 Difference]: With dead ends: 6016 [2022-02-10 04:00:20,364 INFO L226 Difference]: Without dead ends: 6016 [2022-02-10 04:00:20,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1887 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1272, Invalid=4130, Unknown=0, NotChecked=0, Total=5402 [2022-02-10 04:00:20,365 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 386 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-10 04:00:20,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 280 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-10 04:00:20,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6016 states. [2022-02-10 04:00:20,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6016 to 3419. [2022-02-10 04:00:20,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3419 states, 3418 states have (on average 2.500292568753657) internal successors, (8546), 3418 states have internal predecessors, (8546), 0 states have call successors, (0), 0 states 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 04:00:20,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3419 states to 3419 states and 8546 transitions. [2022-02-10 04:00:20,440 INFO L78 Accepts]: Start accepts. Automaton has 3419 states and 8546 transitions. Word has length 28 [2022-02-10 04:00:20,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:00:20,440 INFO L470 AbstractCegarLoop]: Abstraction has 3419 states and 8546 transitions. [2022-02-10 04:00:20,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:00:20,440 INFO L276 IsEmpty]: Start isEmpty. Operand 3419 states and 8546 transitions. [2022-02-10 04:00:20,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-10 04:00:20,445 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:00:20,445 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 04:00:20,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-02-10 04:00:20,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-02-10 04:00:20,645 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:00:20,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:00:20,646 INFO L85 PathProgramCache]: Analyzing trace with hash -65114252, now seen corresponding path program 41 times [2022-02-10 04:00:20,646 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:00:20,646 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640753052] [2022-02-10 04:00:20,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:00:20,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:00:20,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:00:20,694 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:20,694 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:00:20,694 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640753052] [2022-02-10 04:00:20,694 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640753052] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:00:20,694 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629518046] [2022-02-10 04:00:20,694 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 04:00:20,694 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:00:20,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:00:20,695 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:00:20,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-02-10 04:00:20,718 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 04:00:20,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 04:00:20,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-10 04:00:20,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:00:20,807 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:20,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:00:20,889 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:20,890 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629518046] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:00:20,890 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:00:20,890 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-10 04:00:20,890 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517508303] [2022-02-10 04:00:20,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:00:20,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-10 04:00:20,890 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:00:20,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-10 04:00:20,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-02-10 04:00:20,890 INFO L87 Difference]: Start difference. First operand 3419 states and 8546 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 04:00:22,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:00:22,007 INFO L93 Difference]: Finished difference Result 7290 states and 15682 transitions. [2022-02-10 04:00:22,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-02-10 04:00:22,007 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 28 [2022-02-10 04:00:22,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:00:22,019 INFO L225 Difference]: With dead ends: 7290 [2022-02-10 04:00:22,020 INFO L226 Difference]: Without dead ends: 7274 [2022-02-10 04:00:22,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2800 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1614, Invalid=5526, Unknown=0, NotChecked=0, Total=7140 [2022-02-10 04:00:22,021 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 578 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 04:00:22,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [578 Valid, 215 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 04:00:22,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7274 states. [2022-02-10 04:00:22,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7274 to 3558. [2022-02-10 04:00:22,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3558 states, 3557 states have (on average 2.5021085184143943) internal successors, (8900), 3557 states have internal predecessors, (8900), 0 states have call successors, (0), 0 states 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 04:00:22,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3558 states to 3558 states and 8900 transitions. [2022-02-10 04:00:22,111 INFO L78 Accepts]: Start accepts. Automaton has 3558 states and 8900 transitions. Word has length 28 [2022-02-10 04:00:22,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:00:22,111 INFO L470 AbstractCegarLoop]: Abstraction has 3558 states and 8900 transitions. [2022-02-10 04:00:22,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 04:00:22,112 INFO L276 IsEmpty]: Start isEmpty. Operand 3558 states and 8900 transitions. [2022-02-10 04:00:22,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-10 04:00:22,117 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:00:22,117 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 04:00:22,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-02-10 04:00:22,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-02-10 04:00:22,327 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:00:22,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:00:22,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1377200012, now seen corresponding path program 42 times [2022-02-10 04:00:22,328 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:00:22,328 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387828115] [2022-02-10 04:00:22,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:00:22,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:00:22,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:00:22,365 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:22,365 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:00:22,365 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387828115] [2022-02-10 04:00:22,365 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387828115] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:00:22,366 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875617626] [2022-02-10 04:00:22,366 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 04:00:22,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:00:22,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:00:22,367 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:00:22,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-02-10 04:00:22,388 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 04:00:22,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 04:00:22,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-10 04:00:22,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:00:22,476 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:22,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:00:22,565 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:22,566 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875617626] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:00:22,566 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:00:22,566 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-02-10 04:00:22,566 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428211133] [2022-02-10 04:00:22,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:00:22,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-10 04:00:22,566 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:00:22,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-10 04:00:22,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-02-10 04:00:22,566 INFO L87 Difference]: Start difference. First operand 3558 states and 8900 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 04:00:23,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:00:23,772 INFO L93 Difference]: Finished difference Result 8770 states and 18688 transitions. [2022-02-10 04:00:23,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-02-10 04:00:23,773 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 28 [2022-02-10 04:00:23,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:00:23,790 INFO L225 Difference]: With dead ends: 8770 [2022-02-10 04:00:23,791 INFO L226 Difference]: Without dead ends: 8770 [2022-02-10 04:00:23,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2960 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1720, Invalid=5590, Unknown=0, NotChecked=0, Total=7310 [2022-02-10 04:00:23,792 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 544 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-10 04:00:23,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [544 Valid, 252 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-10 04:00:23,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8770 states. [2022-02-10 04:00:23,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8770 to 3832. [2022-02-10 04:00:23,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3832 states, 3831 states have (on average 2.5403288958496475) internal successors, (9732), 3831 states have internal predecessors, (9732), 0 states have call successors, (0), 0 states 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 04:00:23,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3832 states to 3832 states and 9732 transitions. [2022-02-10 04:00:23,907 INFO L78 Accepts]: Start accepts. Automaton has 3832 states and 9732 transitions. Word has length 28 [2022-02-10 04:00:23,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:00:23,908 INFO L470 AbstractCegarLoop]: Abstraction has 3832 states and 9732 transitions. [2022-02-10 04:00:23,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 04:00:23,908 INFO L276 IsEmpty]: Start isEmpty. Operand 3832 states and 9732 transitions. [2022-02-10 04:00:23,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-10 04:00:23,914 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:00:23,914 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 04:00:23,938 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-02-10 04:00:24,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-02-10 04:00:24,114 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:00:24,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:00:24,117 INFO L85 PathProgramCache]: Analyzing trace with hash -705662024, now seen corresponding path program 43 times [2022-02-10 04:00:24,117 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:00:24,117 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167816137] [2022-02-10 04:00:24,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:00:24,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:00:24,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:00:24,174 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:24,174 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:00:24,174 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167816137] [2022-02-10 04:00:24,174 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167816137] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:00:24,174 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480838874] [2022-02-10 04:00:24,175 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 04:00:24,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:00:24,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:00:24,176 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:00:24,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-02-10 04:00:24,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:00:24,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 04:00:24,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:00:24,280 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:24,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:00:24,373 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:24,374 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480838874] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:00:24,374 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:00:24,374 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 17 [2022-02-10 04:00:24,374 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267065343] [2022-02-10 04:00:24,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:00:24,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-10 04:00:24,374 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:00:24,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-10 04:00:24,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-02-10 04:00:24,374 INFO L87 Difference]: Start difference. First operand 3832 states and 9732 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:00:25,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:00:25,239 INFO L93 Difference]: Finished difference Result 6643 states and 15023 transitions. [2022-02-10 04:00:25,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-02-10 04:00:25,240 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-10 04:00:25,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:00:25,249 INFO L225 Difference]: With dead ends: 6643 [2022-02-10 04:00:25,249 INFO L226 Difference]: Without dead ends: 6642 [2022-02-10 04:00:25,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1604 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1062, Invalid=3768, Unknown=0, NotChecked=0, Total=4830 [2022-02-10 04:00:25,250 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 372 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 895 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-10 04:00:25,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 271 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 895 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-10 04:00:25,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6642 states. [2022-02-10 04:00:25,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6642 to 3837. [2022-02-10 04:00:25,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3837 states, 3836 states have (on average 2.5417101147028154) internal successors, (9750), 3836 states have internal predecessors, (9750), 0 states have call successors, (0), 0 states 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 04:00:25,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3837 states to 3837 states and 9750 transitions. [2022-02-10 04:00:25,323 INFO L78 Accepts]: Start accepts. Automaton has 3837 states and 9750 transitions. Word has length 28 [2022-02-10 04:00:25,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:00:25,323 INFO L470 AbstractCegarLoop]: Abstraction has 3837 states and 9750 transitions. [2022-02-10 04:00:25,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:00:25,323 INFO L276 IsEmpty]: Start isEmpty. Operand 3837 states and 9750 transitions. [2022-02-10 04:00:25,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-10 04:00:25,328 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:00:25,328 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 04:00:25,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-02-10 04:00:25,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:00:25,539 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:00:25,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:00:25,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1780386436, now seen corresponding path program 44 times [2022-02-10 04:00:25,540 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:00:25,540 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283238081] [2022-02-10 04:00:25,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:00:25,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:00:25,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:00:25,581 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:25,582 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:00:25,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283238081] [2022-02-10 04:00:25,582 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283238081] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:00:25,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053655983] [2022-02-10 04:00:25,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 04:00:25,582 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:00:25,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:00:25,583 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:00:25,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-02-10 04:00:25,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 04:00:25,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 04:00:25,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 04:00:25,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:00:25,723 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:25,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:00:25,823 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:25,823 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053655983] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:00:25,823 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:00:25,823 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 19 [2022-02-10 04:00:25,823 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126923087] [2022-02-10 04:00:25,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:00:25,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 04:00:25,834 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:00:25,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 04:00:25,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2022-02-10 04:00:25,834 INFO L87 Difference]: Start difference. First operand 3837 states and 9750 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states 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 04:00:27,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:00:27,360 INFO L93 Difference]: Finished difference Result 9569 states and 21576 transitions. [2022-02-10 04:00:27,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-02-10 04:00:27,361 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-10 04:00:27,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:00:27,374 INFO L225 Difference]: With dead ends: 9569 [2022-02-10 04:00:27,375 INFO L226 Difference]: Without dead ends: 9568 [2022-02-10 04:00:27,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3624 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2169, Invalid=7337, Unknown=0, NotChecked=0, Total=9506 [2022-02-10 04:00:27,376 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 570 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 1213 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 1312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-10 04:00:27,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [570 Valid, 396 Invalid, 1312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1213 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-10 04:00:27,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9568 states. [2022-02-10 04:00:27,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9568 to 4203. [2022-02-10 04:00:27,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4203 states, 4202 states have (on average 2.566872917658258) internal successors, (10786), 4202 states have internal predecessors, (10786), 0 states have call successors, (0), 0 states 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 04:00:27,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4203 states to 4203 states and 10786 transitions. [2022-02-10 04:00:27,483 INFO L78 Accepts]: Start accepts. Automaton has 4203 states and 10786 transitions. Word has length 28 [2022-02-10 04:00:27,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:00:27,484 INFO L470 AbstractCegarLoop]: Abstraction has 4203 states and 10786 transitions. [2022-02-10 04:00:27,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states 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 04:00:27,484 INFO L276 IsEmpty]: Start isEmpty. Operand 4203 states and 10786 transitions. [2022-02-10 04:00:27,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-10 04:00:27,488 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:00:27,489 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 04:00:27,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-02-10 04:00:27,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:00:27,689 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:00:27,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:00:27,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1717145810, now seen corresponding path program 45 times [2022-02-10 04:00:27,689 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:00:27,689 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216917667] [2022-02-10 04:00:27,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:00:27,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:00:27,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:00:27,736 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:27,736 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:00:27,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216917667] [2022-02-10 04:00:27,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216917667] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:00:27,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270201327] [2022-02-10 04:00:27,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 04:00:27,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:00:27,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:00:27,737 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:00:27,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-02-10 04:00:27,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-10 04:00:27,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 04:00:27,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 04:00:27,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:00:27,873 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:27,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:00:27,974 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:27,974 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270201327] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:00:27,975 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:00:27,975 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 19 [2022-02-10 04:00:27,975 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307848403] [2022-02-10 04:00:27,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:00:27,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 04:00:27,975 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:00:27,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 04:00:27,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-02-10 04:00:27,975 INFO L87 Difference]: Start difference. First operand 4203 states and 10786 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states 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 04:00:29,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:00:29,848 INFO L93 Difference]: Finished difference Result 7976 states and 18093 transitions. [2022-02-10 04:00:29,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-02-10 04:00:29,849 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-10 04:00:29,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:00:29,861 INFO L225 Difference]: With dead ends: 7976 [2022-02-10 04:00:29,862 INFO L226 Difference]: Without dead ends: 7976 [2022-02-10 04:00:29,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6071 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2823, Invalid=11939, Unknown=0, NotChecked=0, Total=14762 [2022-02-10 04:00:29,864 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 517 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 1264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-10 04:00:29,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 403 Invalid, 1264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1145 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-10 04:00:29,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7976 states. [2022-02-10 04:00:29,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7976 to 4213. [2022-02-10 04:00:29,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4213 states, 4212 states have (on average 2.5641025641025643) internal successors, (10800), 4212 states have internal predecessors, (10800), 0 states have call successors, (0), 0 states 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 04:00:29,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4213 states to 4213 states and 10800 transitions. [2022-02-10 04:00:29,956 INFO L78 Accepts]: Start accepts. Automaton has 4213 states and 10800 transitions. Word has length 28 [2022-02-10 04:00:29,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:00:29,956 INFO L470 AbstractCegarLoop]: Abstraction has 4213 states and 10800 transitions. [2022-02-10 04:00:29,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states 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 04:00:29,956 INFO L276 IsEmpty]: Start isEmpty. Operand 4213 states and 10800 transitions. [2022-02-10 04:00:29,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-10 04:00:29,962 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:00:29,962 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 04:00:29,978 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-02-10 04:00:30,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:00:30,163 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:00:30,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:00:30,163 INFO L85 PathProgramCache]: Analyzing trace with hash 2009710520, now seen corresponding path program 27 times [2022-02-10 04:00:30,163 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:00:30,163 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041780256] [2022-02-10 04:00:30,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:00:30,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:00:30,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:00:30,209 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:30,210 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:00:30,210 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041780256] [2022-02-10 04:00:30,210 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041780256] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:00:30,210 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543511018] [2022-02-10 04:00:30,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 04:00:30,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:00:30,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:00:30,211 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:00:30,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-02-10 04:00:30,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 04:00:30,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 04:00:30,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 04:00:30,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:00:30,325 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:30,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:00:30,413 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:30,413 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543511018] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:00:30,413 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:00:30,413 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-02-10 04:00:30,414 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749642823] [2022-02-10 04:00:30,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:00:30,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-10 04:00:30,414 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:00:30,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-10 04:00:30,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-02-10 04:00:30,414 INFO L87 Difference]: Start difference. First operand 4213 states and 10800 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 04:00:31,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:00:31,320 INFO L93 Difference]: Finished difference Result 7868 states and 18562 transitions. [2022-02-10 04:00:31,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-02-10 04:00:31,320 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 28 [2022-02-10 04:00:31,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:00:31,335 INFO L225 Difference]: With dead ends: 7868 [2022-02-10 04:00:31,335 INFO L226 Difference]: Without dead ends: 7868 [2022-02-10 04:00:31,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=974, Invalid=3856, Unknown=0, NotChecked=0, Total=4830 [2022-02-10 04:00:31,336 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 358 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 04:00:31,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 236 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 04:00:31,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7868 states. [2022-02-10 04:00:31,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7868 to 4221. [2022-02-10 04:00:31,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4221 states, 4220 states have (on average 2.5627962085308056) internal successors, (10815), 4220 states have internal predecessors, (10815), 0 states have call successors, (0), 0 states 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 04:00:31,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4221 states to 4221 states and 10815 transitions. [2022-02-10 04:00:31,420 INFO L78 Accepts]: Start accepts. Automaton has 4221 states and 10815 transitions. Word has length 28 [2022-02-10 04:00:31,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:00:31,420 INFO L470 AbstractCegarLoop]: Abstraction has 4221 states and 10815 transitions. [2022-02-10 04:00:31,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 04:00:31,420 INFO L276 IsEmpty]: Start isEmpty. Operand 4221 states and 10815 transitions. [2022-02-10 04:00:31,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-10 04:00:31,425 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:00:31,425 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 04:00:31,445 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-02-10 04:00:31,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2022-02-10 04:00:31,626 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:00:31,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:00:31,626 INFO L85 PathProgramCache]: Analyzing trace with hash -922465864, now seen corresponding path program 28 times [2022-02-10 04:00:31,626 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:00:31,626 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985657096] [2022-02-10 04:00:31,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:00:31,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:00:31,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:00:31,698 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:31,699 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:00:31,699 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985657096] [2022-02-10 04:00:31,699 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985657096] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:00:31,699 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177054268] [2022-02-10 04:00:31,699 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 04:00:31,699 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:00:31,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:00:31,700 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:00:31,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-02-10 04:00:31,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 04:00:31,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 04:00:31,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 04:00:31,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:00:31,830 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:31,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:00:31,937 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:31,938 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177054268] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:00:31,938 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:00:31,938 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-02-10 04:00:31,938 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081673520] [2022-02-10 04:00:31,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:00:31,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-10 04:00:31,938 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:00:31,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-10 04:00:31,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-02-10 04:00:31,939 INFO L87 Difference]: Start difference. First operand 4221 states and 10815 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 04:00:33,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:00:33,085 INFO L93 Difference]: Finished difference Result 7941 states and 18650 transitions. [2022-02-10 04:00:33,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-02-10 04:00:33,086 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 28 [2022-02-10 04:00:33,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:00:33,102 INFO L225 Difference]: With dead ends: 7941 [2022-02-10 04:00:33,102 INFO L226 Difference]: Without dead ends: 7941 [2022-02-10 04:00:33,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2531 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1480, Invalid=5660, Unknown=0, NotChecked=0, Total=7140 [2022-02-10 04:00:33,103 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 378 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-10 04:00:33,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [378 Valid, 279 Invalid, 851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-10 04:00:33,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7941 states. [2022-02-10 04:00:33,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7941 to 4275. [2022-02-10 04:00:33,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4275 states, 4274 states have (on average 2.559429106223678) internal successors, (10939), 4274 states have internal predecessors, (10939), 0 states have call successors, (0), 0 states 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 04:00:33,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4275 states to 4275 states and 10939 transitions. [2022-02-10 04:00:33,214 INFO L78 Accepts]: Start accepts. Automaton has 4275 states and 10939 transitions. Word has length 28 [2022-02-10 04:00:33,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:00:33,214 INFO L470 AbstractCegarLoop]: Abstraction has 4275 states and 10939 transitions. [2022-02-10 04:00:33,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 04:00:33,214 INFO L276 IsEmpty]: Start isEmpty. Operand 4275 states and 10939 transitions. [2022-02-10 04:00:33,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-10 04:00:33,220 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:00:33,220 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 04:00:33,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-02-10 04:00:33,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:00:33,421 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:00:33,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:00:33,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1823412236, now seen corresponding path program 29 times [2022-02-10 04:00:33,421 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:00:33,421 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644679999] [2022-02-10 04:00:33,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:00:33,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:00:33,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:00:33,462 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:33,462 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:00:33,462 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644679999] [2022-02-10 04:00:33,462 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644679999] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:00:33,462 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296356300] [2022-02-10 04:00:33,462 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 04:00:33,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:00:33,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:00:33,463 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:00:33,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-02-10 04:00:33,490 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 04:00:33,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 04:00:33,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 04:00:33,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:00:33,602 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:33,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:00:33,648 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:33,648 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296356300] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:00:33,648 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:00:33,648 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 16 [2022-02-10 04:00:33,648 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77636070] [2022-02-10 04:00:33,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:00:33,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-10 04:00:33,648 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:00:33,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-10 04:00:33,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-02-10 04:00:33,649 INFO L87 Difference]: Start difference. First operand 4275 states and 10939 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:00:34,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:00:34,163 INFO L93 Difference]: Finished difference Result 7196 states and 17625 transitions. [2022-02-10 04:00:34,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-10 04:00:34,163 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-10 04:00:34,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:00:34,176 INFO L225 Difference]: With dead ends: 7196 [2022-02-10 04:00:34,176 INFO L226 Difference]: Without dead ends: 7195 [2022-02-10 04:00:34,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=517, Invalid=1289, Unknown=0, NotChecked=0, Total=1806 [2022-02-10 04:00:34,177 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 256 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 04:00:34,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 188 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 04:00:34,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7195 states. [2022-02-10 04:00:34,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7195 to 5520. [2022-02-10 04:00:34,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5520 states, 5519 states have (on average 2.596847254937489) internal successors, (14332), 5519 states have internal predecessors, (14332), 0 states have call successors, (0), 0 states 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 04:00:34,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5520 states to 5520 states and 14332 transitions. [2022-02-10 04:00:34,271 INFO L78 Accepts]: Start accepts. Automaton has 5520 states and 14332 transitions. Word has length 28 [2022-02-10 04:00:34,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:00:34,271 INFO L470 AbstractCegarLoop]: Abstraction has 5520 states and 14332 transitions. [2022-02-10 04:00:34,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:00:34,271 INFO L276 IsEmpty]: Start isEmpty. Operand 5520 states and 14332 transitions. [2022-02-10 04:00:34,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-10 04:00:34,278 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:00:34,278 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 04:00:34,294 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-02-10 04:00:34,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:00:34,479 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:00:34,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:00:34,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1151874248, now seen corresponding path program 30 times [2022-02-10 04:00:34,479 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:00:34,479 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604197852] [2022-02-10 04:00:34,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:00:34,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:00:34,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:00:34,521 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:34,521 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:00:34,521 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604197852] [2022-02-10 04:00:34,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604197852] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:00:34,521 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129975033] [2022-02-10 04:00:34,521 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 04:00:34,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:00:34,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:00:34,522 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:00:34,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-02-10 04:00:34,545 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-02-10 04:00:34,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 04:00:34,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 04:00:34,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:00:34,620 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:34,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:00:34,699 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:34,700 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129975033] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:00:34,700 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:00:34,700 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-02-10 04:00:34,700 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593027021] [2022-02-10 04:00:34,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:00:34,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-10 04:00:34,700 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:00:34,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-10 04:00:34,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2022-02-10 04:00:34,701 INFO L87 Difference]: Start difference. First operand 5520 states and 14332 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 04:00:35,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:00:35,676 INFO L93 Difference]: Finished difference Result 9162 states and 22424 transitions. [2022-02-10 04:00:35,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-02-10 04:00:35,676 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 28 [2022-02-10 04:00:35,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:00:35,695 INFO L225 Difference]: With dead ends: 9162 [2022-02-10 04:00:35,695 INFO L226 Difference]: Without dead ends: 9161 [2022-02-10 04:00:35,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2359 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1360, Invalid=5446, Unknown=0, NotChecked=0, Total=6806 [2022-02-10 04:00:35,696 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 364 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 04:00:35,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 194 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 04:00:35,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9161 states. [2022-02-10 04:00:35,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9161 to 5627. [2022-02-10 04:00:35,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5627 states, 5626 states have (on average 2.587273373622467) internal successors, (14556), 5626 states have internal predecessors, (14556), 0 states have call successors, (0), 0 states 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 04:00:35,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5627 states to 5627 states and 14556 transitions. [2022-02-10 04:00:35,817 INFO L78 Accepts]: Start accepts. Automaton has 5627 states and 14556 transitions. Word has length 28 [2022-02-10 04:00:35,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:00:35,817 INFO L470 AbstractCegarLoop]: Abstraction has 5627 states and 14556 transitions. [2022-02-10 04:00:35,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 04:00:35,817 INFO L276 IsEmpty]: Start isEmpty. Operand 5627 states and 14556 transitions. [2022-02-10 04:00:35,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-10 04:00:35,825 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:00:35,825 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 04:00:35,842 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-02-10 04:00:36,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-02-10 04:00:36,026 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:00:36,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:00:36,026 INFO L85 PathProgramCache]: Analyzing trace with hash -58592460, now seen corresponding path program 46 times [2022-02-10 04:00:36,026 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:00:36,026 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875786288] [2022-02-10 04:00:36,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:00:36,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:00:36,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:00:36,061 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:36,062 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:00:36,062 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875786288] [2022-02-10 04:00:36,062 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875786288] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:00:36,062 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463106749] [2022-02-10 04:00:36,062 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 04:00:36,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:00:36,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:00:36,063 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:00:36,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-02-10 04:00:36,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 04:00:36,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 04:00:36,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-10 04:00:36,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:00:36,154 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:36,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:00:36,233 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:36,233 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463106749] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:00:36,233 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:00:36,233 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-02-10 04:00:36,234 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947738669] [2022-02-10 04:00:36,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:00:36,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-10 04:00:36,234 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:00:36,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-10 04:00:36,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-02-10 04:00:36,234 INFO L87 Difference]: Start difference. First operand 5627 states and 14556 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) 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 04:00:36,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:00:36,926 INFO L93 Difference]: Finished difference Result 11950 states and 29181 transitions. [2022-02-10 04:00:36,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-10 04:00:36,927 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) 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 28 [2022-02-10 04:00:36,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:00:36,950 INFO L225 Difference]: With dead ends: 11950 [2022-02-10 04:00:36,950 INFO L226 Difference]: Without dead ends: 11907 [2022-02-10 04:00:36,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=652, Invalid=2000, Unknown=0, NotChecked=0, Total=2652 [2022-02-10 04:00:36,951 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 300 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 04:00:36,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 223 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 04:00:36,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11907 states. [2022-02-10 04:00:37,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11907 to 9292. [2022-02-10 04:00:37,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9292 states, 9291 states have (on average 2.658594338607254) internal successors, (24701), 9291 states have internal predecessors, (24701), 0 states have call successors, (0), 0 states 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 04:00:37,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9292 states to 9292 states and 24701 transitions. [2022-02-10 04:00:37,131 INFO L78 Accepts]: Start accepts. Automaton has 9292 states and 24701 transitions. Word has length 28 [2022-02-10 04:00:37,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:00:37,131 INFO L470 AbstractCegarLoop]: Abstraction has 9292 states and 24701 transitions. [2022-02-10 04:00:37,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) 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 04:00:37,132 INFO L276 IsEmpty]: Start isEmpty. Operand 9292 states and 24701 transitions. [2022-02-10 04:00:37,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-10 04:00:37,144 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:00:37,144 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 04:00:37,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-02-10 04:00:37,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-02-10 04:00:37,347 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:00:37,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:00:37,348 INFO L85 PathProgramCache]: Analyzing trace with hash 716430712, now seen corresponding path program 47 times [2022-02-10 04:00:37,348 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:00:37,348 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764893910] [2022-02-10 04:00:37,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:00:37,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:00:37,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:00:37,377 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 04:00:37,377 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:00:37,377 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764893910] [2022-02-10 04:00:37,377 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764893910] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:00:37,377 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356367752] [2022-02-10 04:00:37,377 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 04:00:37,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:00:37,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:00:37,378 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:00:37,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-02-10 04:00:37,400 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 04:00:37,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 04:00:37,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-10 04:00:37,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:00:37,468 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 04:00:37,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:00:37,545 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 04:00:37,546 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356367752] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:00:37,546 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:00:37,546 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 13 [2022-02-10 04:00:37,546 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065789733] [2022-02-10 04:00:37,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:00:37,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-10 04:00:37,546 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:00:37,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-10 04:00:37,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-02-10 04:00:37,547 INFO L87 Difference]: Start difference. First operand 9292 states and 24701 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:00:37,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:00:37,882 INFO L93 Difference]: Finished difference Result 12934 states and 31877 transitions. [2022-02-10 04:00:37,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-10 04:00:37,882 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-10 04:00:37,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:00:37,911 INFO L225 Difference]: With dead ends: 12934 [2022-02-10 04:00:37,911 INFO L226 Difference]: Without dead ends: 12934 [2022-02-10 04:00:37,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=328, Invalid=602, Unknown=0, NotChecked=0, Total=930 [2022-02-10 04:00:37,912 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 228 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 04:00:37,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 80 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 04:00:37,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12934 states. [2022-02-10 04:00:38,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12934 to 9594. [2022-02-10 04:00:38,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9594 states, 9593 states have (on average 2.6353591160220993) internal successors, (25281), 9593 states have internal predecessors, (25281), 0 states have call successors, (0), 0 states 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 04:00:38,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9594 states to 9594 states and 25281 transitions. [2022-02-10 04:00:38,115 INFO L78 Accepts]: Start accepts. Automaton has 9594 states and 25281 transitions. Word has length 28 [2022-02-10 04:00:38,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:00:38,115 INFO L470 AbstractCegarLoop]: Abstraction has 9594 states and 25281 transitions. [2022-02-10 04:00:38,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:00:38,115 INFO L276 IsEmpty]: Start isEmpty. Operand 9594 states and 25281 transitions. [2022-02-10 04:00:38,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-10 04:00:38,128 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:00:38,128 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 04:00:38,144 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-02-10 04:00:38,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:00:38,329 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:00:38,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:00:38,329 INFO L85 PathProgramCache]: Analyzing trace with hash 2035252732, now seen corresponding path program 48 times [2022-02-10 04:00:38,329 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:00:38,329 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340071494] [2022-02-10 04:00:38,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:00:38,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:00:38,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:00:38,366 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:38,366 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:00:38,366 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340071494] [2022-02-10 04:00:38,366 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340071494] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:00:38,367 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525282920] [2022-02-10 04:00:38,367 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 04:00:38,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:00:38,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:00:38,368 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:00:38,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-02-10 04:00:38,389 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-10 04:00:38,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 04:00:38,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 04:00:38,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:00:38,466 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:38,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:00:38,550 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:38,550 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525282920] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:00:38,550 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:00:38,550 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 15 [2022-02-10 04:00:38,550 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798426520] [2022-02-10 04:00:38,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:00:38,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-10 04:00:38,550 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:00:38,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-10 04:00:38,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-02-10 04:00:38,551 INFO L87 Difference]: Start difference. First operand 9594 states and 25281 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 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 04:00:39,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:00:39,185 INFO L93 Difference]: Finished difference Result 13882 states and 34767 transitions. [2022-02-10 04:00:39,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-10 04:00:39,185 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 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 28 [2022-02-10 04:00:39,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:00:39,224 INFO L225 Difference]: With dead ends: 13882 [2022-02-10 04:00:39,225 INFO L226 Difference]: Without dead ends: 13882 [2022-02-10 04:00:39,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=653, Invalid=2103, Unknown=0, NotChecked=0, Total=2756 [2022-02-10 04:00:39,225 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 370 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 04:00:39,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 190 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 04:00:39,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13882 states. [2022-02-10 04:00:39,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13882 to 10692. [2022-02-10 04:00:39,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10692 states, 10691 states have (on average 2.6262276681320738) internal successors, (28077), 10691 states have internal predecessors, (28077), 0 states have call successors, (0), 0 states 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 04:00:39,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10692 states to 10692 states and 28077 transitions. [2022-02-10 04:00:39,464 INFO L78 Accepts]: Start accepts. Automaton has 10692 states and 28077 transitions. Word has length 28 [2022-02-10 04:00:39,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:00:39,464 INFO L470 AbstractCegarLoop]: Abstraction has 10692 states and 28077 transitions. [2022-02-10 04:00:39,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 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 04:00:39,464 INFO L276 IsEmpty]: Start isEmpty. Operand 10692 states and 28077 transitions. [2022-02-10 04:00:39,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-10 04:00:39,479 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:00:39,479 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 04:00:39,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-02-10 04:00:39,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:00:39,679 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:00:39,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:00:39,680 INFO L85 PathProgramCache]: Analyzing trace with hash -410721028, now seen corresponding path program 49 times [2022-02-10 04:00:39,680 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:00:39,680 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821872139] [2022-02-10 04:00:39,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:00:39,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:00:39,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:00:39,711 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:39,711 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:00:39,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821872139] [2022-02-10 04:00:39,711 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821872139] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:00:39,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967210108] [2022-02-10 04:00:39,712 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 04:00:39,712 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:00:39,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:00:39,713 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:00:39,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-02-10 04:00:39,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:00:39,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-10 04:00:39,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:00:39,801 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:39,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:00:39,869 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:39,869 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967210108] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:00:39,869 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:00:39,869 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-02-10 04:00:39,869 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417933505] [2022-02-10 04:00:39,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:00:39,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-10 04:00:39,870 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:00:39,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-10 04:00:39,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-02-10 04:00:39,870 INFO L87 Difference]: Start difference. First operand 10692 states and 28077 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:00:40,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:00:40,314 INFO L93 Difference]: Finished difference Result 14091 states and 35049 transitions. [2022-02-10 04:00:40,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-10 04:00:40,315 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-10 04:00:40,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:00:40,344 INFO L225 Difference]: With dead ends: 14091 [2022-02-10 04:00:40,344 INFO L226 Difference]: Without dead ends: 14078 [2022-02-10 04:00:40,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=376, Invalid=956, Unknown=0, NotChecked=0, Total=1332 [2022-02-10 04:00:40,344 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 243 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 04:00:40,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 178 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 04:00:40,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14078 states. [2022-02-10 04:00:40,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14078 to 11295. [2022-02-10 04:00:40,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11295 states, 11294 states have (on average 2.6299805206304234) internal successors, (29703), 11294 states have internal predecessors, (29703), 0 states have call successors, (0), 0 states 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 04:00:40,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11295 states to 11295 states and 29703 transitions. [2022-02-10 04:00:40,567 INFO L78 Accepts]: Start accepts. Automaton has 11295 states and 29703 transitions. Word has length 28 [2022-02-10 04:00:40,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:00:40,568 INFO L470 AbstractCegarLoop]: Abstraction has 11295 states and 29703 transitions. [2022-02-10 04:00:40,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:00:40,568 INFO L276 IsEmpty]: Start isEmpty. Operand 11295 states and 29703 transitions. [2022-02-10 04:00:40,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-10 04:00:40,583 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:00:40,583 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 04:00:40,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-02-10 04:00:40,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:00:40,783 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:00:40,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:00:40,784 INFO L85 PathProgramCache]: Analyzing trace with hash 735886080, now seen corresponding path program 50 times [2022-02-10 04:00:40,784 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:00:40,784 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937800414] [2022-02-10 04:00:40,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:00:40,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:00:40,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:00:40,815 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 04:00:40,815 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:00:40,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937800414] [2022-02-10 04:00:40,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937800414] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:00:40,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344590250] [2022-02-10 04:00:40,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 04:00:40,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:00:40,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:00:40,816 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:00:40,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-02-10 04:00:40,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 04:00:40,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 04:00:40,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-10 04:00:40,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:00:40,912 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 04:00:40,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:00:40,979 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 04:00:40,979 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344590250] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:00:40,980 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:00:40,980 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-02-10 04:00:40,980 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152258626] [2022-02-10 04:00:40,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:00:40,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-10 04:00:40,980 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:00:40,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-10 04:00:40,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-02-10 04:00:40,980 INFO L87 Difference]: Start difference. First operand 11295 states and 29703 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:00:41,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:00:41,442 INFO L93 Difference]: Finished difference Result 13873 states and 34236 transitions. [2022-02-10 04:00:41,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-10 04:00:41,442 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-10 04:00:41,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:00:41,475 INFO L225 Difference]: With dead ends: 13873 [2022-02-10 04:00:41,475 INFO L226 Difference]: Without dead ends: 13873 [2022-02-10 04:00:41,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=376, Invalid=956, Unknown=0, NotChecked=0, Total=1332 [2022-02-10 04:00:41,489 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 235 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 04:00:41,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 269 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 04:00:41,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13873 states. [2022-02-10 04:00:41,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13873 to 11314. [2022-02-10 04:00:41,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11314 states, 11313 states have (on average 2.62291169451074) internal successors, (29673), 11313 states have internal predecessors, (29673), 0 states have call successors, (0), 0 states 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 04:00:41,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11314 states to 11314 states and 29673 transitions. [2022-02-10 04:00:41,698 INFO L78 Accepts]: Start accepts. Automaton has 11314 states and 29673 transitions. Word has length 28 [2022-02-10 04:00:41,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:00:41,698 INFO L470 AbstractCegarLoop]: Abstraction has 11314 states and 29673 transitions. [2022-02-10 04:00:41,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:00:41,698 INFO L276 IsEmpty]: Start isEmpty. Operand 11314 states and 29673 transitions. [2022-02-10 04:00:41,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-10 04:00:41,712 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:00:41,712 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 04:00:41,728 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-02-10 04:00:41,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:00:41,913 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:00:41,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:00:41,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1407424068, now seen corresponding path program 51 times [2022-02-10 04:00:41,913 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:00:41,913 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452789336] [2022-02-10 04:00:41,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:00:41,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:00:41,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:00:41,973 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 04:00:41,973 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:00:41,973 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452789336] [2022-02-10 04:00:41,973 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452789336] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:00:41,973 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102882792] [2022-02-10 04:00:41,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 04:00:41,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:00:41,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:00:41,974 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:00:41,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-02-10 04:00:41,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-10 04:00:41,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 04:00:41,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 04:00:41,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:00:42,084 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 04:00:42,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:00:42,192 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 04:00:42,192 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102882792] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:00:42,192 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:00:42,192 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 15 [2022-02-10 04:00:42,192 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410898144] [2022-02-10 04:00:42,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:00:42,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-10 04:00:42,193 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:00:42,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-10 04:00:42,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-02-10 04:00:42,193 INFO L87 Difference]: Start difference. First operand 11314 states and 29673 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 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 04:00:42,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:00:42,734 INFO L93 Difference]: Finished difference Result 14481 states and 36346 transitions. [2022-02-10 04:00:42,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-10 04:00:42,734 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 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 28 [2022-02-10 04:00:42,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:00:42,761 INFO L225 Difference]: With dead ends: 14481 [2022-02-10 04:00:42,761 INFO L226 Difference]: Without dead ends: 14480 [2022-02-10 04:00:42,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=537, Invalid=1719, Unknown=0, NotChecked=0, Total=2256 [2022-02-10 04:00:42,762 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 358 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 04:00:42,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 142 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 04:00:42,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14480 states. [2022-02-10 04:00:42,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14480 to 11305. [2022-02-10 04:00:42,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11305 states, 11304 states have (on average 2.6232307147912244) internal successors, (29653), 11304 states have internal predecessors, (29653), 0 states have call successors, (0), 0 states 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 04:00:42,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11305 states to 11305 states and 29653 transitions. [2022-02-10 04:00:42,986 INFO L78 Accepts]: Start accepts. Automaton has 11305 states and 29653 transitions. Word has length 28 [2022-02-10 04:00:42,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:00:42,986 INFO L470 AbstractCegarLoop]: Abstraction has 11305 states and 29653 transitions. [2022-02-10 04:00:42,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 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 04:00:42,986 INFO L276 IsEmpty]: Start isEmpty. Operand 11305 states and 29653 transitions. [2022-02-10 04:00:43,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-10 04:00:43,000 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:00:43,000 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 04:00:43,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-02-10 04:00:43,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:00:43,201 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:00:43,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:00:43,201 INFO L85 PathProgramCache]: Analyzing trace with hash 2020104640, now seen corresponding path program 52 times [2022-02-10 04:00:43,201 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:00:43,201 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297250595] [2022-02-10 04:00:43,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:00:43,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:00:43,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:00:43,237 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:43,237 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:00:43,237 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297250595] [2022-02-10 04:00:43,237 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297250595] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:00:43,237 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651639771] [2022-02-10 04:00:43,238 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 04:00:43,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:00:43,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:00:43,239 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:00:43,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-02-10 04:00:43,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 04:00:43,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 04:00:43,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-10 04:00:43,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:00:43,337 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:43,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:00:43,408 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:43,408 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651639771] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:00:43,408 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:00:43,408 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-02-10 04:00:43,408 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816556462] [2022-02-10 04:00:43,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:00:43,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-10 04:00:43,408 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:00:43,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-10 04:00:43,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-02-10 04:00:43,409 INFO L87 Difference]: Start difference. First operand 11305 states and 29653 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) 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 04:00:44,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:00:44,007 INFO L93 Difference]: Finished difference Result 14620 states and 36004 transitions. [2022-02-10 04:00:44,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-10 04:00:44,008 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) 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 28 [2022-02-10 04:00:44,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:00:44,037 INFO L225 Difference]: With dead ends: 14620 [2022-02-10 04:00:44,038 INFO L226 Difference]: Without dead ends: 14620 [2022-02-10 04:00:44,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=516, Invalid=1290, Unknown=0, NotChecked=0, Total=1806 [2022-02-10 04:00:44,039 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 292 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 04:00:44,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 292 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 04:00:44,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14620 states. [2022-02-10 04:00:44,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14620 to 11436. [2022-02-10 04:00:44,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11436 states, 11435 states have (on average 2.6262352426759947) internal successors, (30031), 11435 states have internal predecessors, (30031), 0 states have call successors, (0), 0 states 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 04:00:44,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11436 states to 11436 states and 30031 transitions. [2022-02-10 04:00:44,295 INFO L78 Accepts]: Start accepts. Automaton has 11436 states and 30031 transitions. Word has length 28 [2022-02-10 04:00:44,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:00:44,295 INFO L470 AbstractCegarLoop]: Abstraction has 11436 states and 30031 transitions. [2022-02-10 04:00:44,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) 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 04:00:44,295 INFO L276 IsEmpty]: Start isEmpty. Operand 11436 states and 30031 transitions. [2022-02-10 04:00:44,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-10 04:00:44,310 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:00:44,311 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 04:00:44,327 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-02-10 04:00:44,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2022-02-10 04:00:44,512 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:00:44,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:00:44,512 INFO L85 PathProgramCache]: Analyzing trace with hash 102022580, now seen corresponding path program 53 times [2022-02-10 04:00:44,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:00:44,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628588758] [2022-02-10 04:00:44,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:00:44,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:00:44,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:00:44,566 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:44,566 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:00:44,566 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628588758] [2022-02-10 04:00:44,566 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628588758] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:00:44,566 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071725851] [2022-02-10 04:00:44,566 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 04:00:44,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:00:44,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:00:44,572 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:00:44,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-02-10 04:00:44,596 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 04:00:44,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 04:00:44,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 04:00:44,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:00:44,726 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:44,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:00:44,858 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:44,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071725851] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:00:44,858 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:00:44,858 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-10 04:00:44,858 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113572255] [2022-02-10 04:00:44,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:00:44,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 04:00:44,858 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:00:44,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 04:00:44,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2022-02-10 04:00:44,859 INFO L87 Difference]: Start difference. First operand 11436 states and 30031 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:00:47,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:00:47,064 INFO L93 Difference]: Finished difference Result 29287 states and 72545 transitions. [2022-02-10 04:00:47,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-02-10 04:00:47,064 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-10 04:00:47,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:00:47,142 INFO L225 Difference]: With dead ends: 29287 [2022-02-10 04:00:47,142 INFO L226 Difference]: Without dead ends: 29287 [2022-02-10 04:00:47,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7492 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4085, Invalid=14275, Unknown=0, NotChecked=0, Total=18360 [2022-02-10 04:00:47,145 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 639 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 971 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 639 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-10 04:00:47,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [639 Valid, 259 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 971 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-10 04:00:47,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29287 states. [2022-02-10 04:00:47,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29287 to 15192. [2022-02-10 04:00:47,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15192 states, 15191 states have (on average 2.6963991837272068) internal successors, (40961), 15191 states have internal predecessors, (40961), 0 states have call successors, (0), 0 states 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 04:00:47,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15192 states to 15192 states and 40961 transitions. [2022-02-10 04:00:47,700 INFO L78 Accepts]: Start accepts. Automaton has 15192 states and 40961 transitions. Word has length 28 [2022-02-10 04:00:47,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:00:47,700 INFO L470 AbstractCegarLoop]: Abstraction has 15192 states and 40961 transitions. [2022-02-10 04:00:47,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:00:47,700 INFO L276 IsEmpty]: Start isEmpty. Operand 15192 states and 40961 transitions. [2022-02-10 04:00:47,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-10 04:00:47,723 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:00:47,723 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 04:00:47,739 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-02-10 04:00:47,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:00:47,938 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:00:47,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:00:47,938 INFO L85 PathProgramCache]: Analyzing trace with hash 904633852, now seen corresponding path program 54 times [2022-02-10 04:00:47,938 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:00:47,938 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64762525] [2022-02-10 04:00:47,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:00:47,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:00:47,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:00:47,995 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:47,995 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:00:47,995 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64762525] [2022-02-10 04:00:47,995 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64762525] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:00:47,997 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632367740] [2022-02-10 04:00:47,997 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 04:00:47,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:00:47,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:00:47,998 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:00:47,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-02-10 04:00:48,021 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-10 04:00:48,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 04:00:48,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 04:00:48,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:00:48,116 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:48,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:00:48,219 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:48,219 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632367740] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:00:48,219 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:00:48,219 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-02-10 04:00:48,220 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122328225] [2022-02-10 04:00:48,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:00:48,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 04:00:48,220 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:00:48,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 04:00:48,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2022-02-10 04:00:48,220 INFO L87 Difference]: Start difference. First operand 15192 states and 40961 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states 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 04:00:49,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:00:49,494 INFO L93 Difference]: Finished difference Result 28668 states and 71055 transitions. [2022-02-10 04:00:49,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-02-10 04:00:49,494 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-10 04:00:49,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:00:49,573 INFO L225 Difference]: With dead ends: 28668 [2022-02-10 04:00:49,573 INFO L226 Difference]: Without dead ends: 28665 [2022-02-10 04:00:49,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2742 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1873, Invalid=5783, Unknown=0, NotChecked=0, Total=7656 [2022-02-10 04:00:49,574 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 469 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 872 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-10 04:00:49,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [469 Valid, 291 Invalid, 966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 872 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-10 04:00:49,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28665 states. [2022-02-10 04:00:50,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28665 to 15217. [2022-02-10 04:00:50,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15217 states, 15216 states have (on average 2.6945320715036805) internal successors, (41000), 15216 states have internal predecessors, (41000), 0 states have call successors, (0), 0 states 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 04:00:50,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15217 states to 15217 states and 41000 transitions. [2022-02-10 04:00:50,101 INFO L78 Accepts]: Start accepts. Automaton has 15217 states and 41000 transitions. Word has length 28 [2022-02-10 04:00:50,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:00:50,101 INFO L470 AbstractCegarLoop]: Abstraction has 15217 states and 41000 transitions. [2022-02-10 04:00:50,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states 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 04:00:50,101 INFO L276 IsEmpty]: Start isEmpty. Operand 15217 states and 41000 transitions. [2022-02-10 04:00:50,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-10 04:00:50,123 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:00:50,123 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 04:00:50,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-02-10 04:00:50,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:00:50,323 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:00:50,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:00:50,324 INFO L85 PathProgramCache]: Analyzing trace with hash 314016440, now seen corresponding path program 31 times [2022-02-10 04:00:50,324 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:00:50,324 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361019104] [2022-02-10 04:00:50,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:00:50,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:00:50,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:00:50,368 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:50,368 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:00:50,368 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361019104] [2022-02-10 04:00:50,368 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361019104] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:00:50,368 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354199358] [2022-02-10 04:00:50,368 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 04:00:50,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:00:50,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:00:50,370 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:00:50,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-02-10 04:00:50,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:00:50,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 04:00:50,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:00:50,471 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:50,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:00:50,542 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:50,542 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354199358] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:00:50,542 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:00:50,542 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-02-10 04:00:50,542 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941796035] [2022-02-10 04:00:50,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:00:50,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-10 04:00:50,542 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:00:50,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-10 04:00:50,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-02-10 04:00:50,543 INFO L87 Difference]: Start difference. First operand 15217 states and 41000 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) 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 04:00:51,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:00:51,081 INFO L93 Difference]: Finished difference Result 18745 states and 49587 transitions. [2022-02-10 04:00:51,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-10 04:00:51,081 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) 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 28 [2022-02-10 04:00:51,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:00:51,123 INFO L225 Difference]: With dead ends: 18745 [2022-02-10 04:00:51,123 INFO L226 Difference]: Without dead ends: 18743 [2022-02-10 04:00:51,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=534, Invalid=1818, Unknown=0, NotChecked=0, Total=2352 [2022-02-10 04:00:51,124 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 183 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 04:00:51,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 109 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 04:00:51,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18743 states. [2022-02-10 04:00:51,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18743 to 15251. [2022-02-10 04:00:51,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15251 states, 15250 states have (on average 2.6917377049180327) internal successors, (41049), 15250 states have internal predecessors, (41049), 0 states have call successors, (0), 0 states 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 04:00:51,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15251 states to 15251 states and 41049 transitions. [2022-02-10 04:00:51,448 INFO L78 Accepts]: Start accepts. Automaton has 15251 states and 41049 transitions. Word has length 28 [2022-02-10 04:00:51,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:00:51,448 INFO L470 AbstractCegarLoop]: Abstraction has 15251 states and 41049 transitions. [2022-02-10 04:00:51,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) 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 04:00:51,449 INFO L276 IsEmpty]: Start isEmpty. Operand 15251 states and 41049 transitions. [2022-02-10 04:00:51,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-10 04:00:51,472 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:00:51,472 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 04:00:51,488 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-02-10 04:00:51,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:00:51,673 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:00:51,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:00:51,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1087575676, now seen corresponding path program 32 times [2022-02-10 04:00:51,673 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:00:51,673 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090417970] [2022-02-10 04:00:51,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:00:51,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:00:51,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:00:51,711 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:51,711 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:00:51,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090417970] [2022-02-10 04:00:51,711 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090417970] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:00:51,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692562017] [2022-02-10 04:00:51,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 04:00:51,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:00:51,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:00:51,712 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:00:51,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-02-10 04:00:51,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 04:00:51,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 04:00:51,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 04:00:51,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:00:51,804 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:51,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:00:51,873 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:51,873 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692562017] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:00:51,873 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:00:51,873 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-02-10 04:00:51,874 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830669276] [2022-02-10 04:00:51,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:00:51,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-10 04:00:51,874 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:00:51,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-10 04:00:51,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-02-10 04:00:51,874 INFO L87 Difference]: Start difference. First operand 15251 states and 41049 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) 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 04:00:52,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:00:52,516 INFO L93 Difference]: Finished difference Result 18836 states and 49728 transitions. [2022-02-10 04:00:52,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-10 04:00:52,516 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) 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 28 [2022-02-10 04:00:52,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:00:52,571 INFO L225 Difference]: With dead ends: 18836 [2022-02-10 04:00:52,571 INFO L226 Difference]: Without dead ends: 18836 [2022-02-10 04:00:52,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1002 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=636, Invalid=2444, Unknown=0, NotChecked=0, Total=3080 [2022-02-10 04:00:52,572 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 267 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 04:00:52,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 115 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 04:00:52,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18836 states. [2022-02-10 04:00:52,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18836 to 15505. [2022-02-10 04:00:52,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15505 states, 15504 states have (on average 2.681953044375645) internal successors, (41581), 15504 states have internal predecessors, (41581), 0 states have call successors, (0), 0 states 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 04:00:52,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15505 states to 15505 states and 41581 transitions. [2022-02-10 04:00:52,939 INFO L78 Accepts]: Start accepts. Automaton has 15505 states and 41581 transitions. Word has length 28 [2022-02-10 04:00:52,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:00:52,939 INFO L470 AbstractCegarLoop]: Abstraction has 15505 states and 41581 transitions. [2022-02-10 04:00:52,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) 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 04:00:52,939 INFO L276 IsEmpty]: Start isEmpty. Operand 15505 states and 41581 transitions. [2022-02-10 04:00:52,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-10 04:00:52,961 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:00:52,961 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 04:00:52,976 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-02-10 04:00:53,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:00:53,161 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:00:53,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:00:53,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1358398084, now seen corresponding path program 33 times [2022-02-10 04:00:53,162 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:00:53,162 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268054093] [2022-02-10 04:00:53,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:00:53,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:00:53,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:00:53,198 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:53,199 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:00:53,199 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268054093] [2022-02-10 04:00:53,199 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268054093] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:00:53,199 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121133565] [2022-02-10 04:00:53,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 04:00:53,199 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:00:53,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:00:53,200 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:00:53,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-02-10 04:00:53,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 04:00:53,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 04:00:53,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 04:00:53,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:00:53,332 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:53,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:00:53,376 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 04:00:53,376 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121133565] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:00:53,376 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:00:53,376 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 16 [2022-02-10 04:00:53,376 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110903940] [2022-02-10 04:00:53,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:00:53,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-10 04:00:53,376 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:00:53,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-10 04:00:53,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-02-10 04:00:53,377 INFO L87 Difference]: Start difference. First operand 15505 states and 41581 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:00:53,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:00:53,858 INFO L93 Difference]: Finished difference Result 21770 states and 57681 transitions. [2022-02-10 04:00:53,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-10 04:00:53,858 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-10 04:00:53,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:00:53,907 INFO L225 Difference]: With dead ends: 21770 [2022-02-10 04:00:53,908 INFO L226 Difference]: Without dead ends: 21761 [2022-02-10 04:00:53,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=392, Invalid=1168, Unknown=0, NotChecked=0, Total=1560 [2022-02-10 04:00:53,908 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 239 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 04:00:53,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 171 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 04:00:53,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21761 states. [2022-02-10 04:00:54,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21761 to 20580. [2022-02-10 04:00:54,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20580 states, 20579 states have (on average 2.702852422372321) internal successors, (55622), 20579 states have internal predecessors, (55622), 0 states have call successors, (0), 0 states 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 04:00:54,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20580 states to 20580 states and 55622 transitions. [2022-02-10 04:00:54,304 INFO L78 Accepts]: Start accepts. Automaton has 20580 states and 55622 transitions. Word has length 28 [2022-02-10 04:00:54,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:00:54,305 INFO L470 AbstractCegarLoop]: Abstraction has 20580 states and 55622 transitions. [2022-02-10 04:00:54,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:00:54,305 INFO L276 IsEmpty]: Start isEmpty. Operand 20580 states and 55622 transitions. [2022-02-10 04:00:54,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-10 04:00:54,329 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:00:54,329 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 04:00:54,344 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-02-10 04:00:54,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:00:54,530 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:00:54,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:00:54,530 INFO L85 PathProgramCache]: Analyzing trace with hash 459747012, now seen corresponding path program 34 times [2022-02-10 04:00:54,530 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:00:54,530 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807647170] [2022-02-10 04:00:54,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:00:54,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:00:54,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:00:54,569 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 04:00:54,569 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:00:54,569 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807647170] [2022-02-10 04:00:54,569 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807647170] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:00:54,569 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909306861] [2022-02-10 04:00:54,569 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 04:00:54,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:00:54,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:00:54,570 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:00:54,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-02-10 04:00:54,591 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 04:00:54,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 04:00:54,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 04:00:54,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:00:54,657 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 04:00:54,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:00:54,729 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 04:00:54,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909306861] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:00:54,729 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:00:54,729 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-02-10 04:00:54,730 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189352589] [2022-02-10 04:00:54,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:00:54,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-10 04:00:54,730 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:00:54,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-10 04:00:54,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-02-10 04:00:54,730 INFO L87 Difference]: Start difference. First operand 20580 states and 55622 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) 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 04:00:55,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:00:55,256 INFO L93 Difference]: Finished difference Result 24738 states and 66091 transitions. [2022-02-10 04:00:55,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-10 04:00:55,257 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) 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 28 [2022-02-10 04:00:55,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:00:55,307 INFO L225 Difference]: With dead ends: 24738 [2022-02-10 04:00:55,307 INFO L226 Difference]: Without dead ends: 24736 [2022-02-10 04:00:55,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=414, Invalid=1478, Unknown=0, NotChecked=0, Total=1892 [2022-02-10 04:00:55,308 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 246 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 04:00:55,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 99 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 04:00:55,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24736 states. [2022-02-10 04:00:55,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24736 to 20518. [2022-02-10 04:00:55,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20518 states, 20517 states have (on average 2.7037091192669496) internal successors, (55472), 20517 states have internal predecessors, (55472), 0 states have call successors, (0), 0 states 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 04:00:55,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20518 states to 20518 states and 55472 transitions. [2022-02-10 04:00:55,709 INFO L78 Accepts]: Start accepts. Automaton has 20518 states and 55472 transitions. Word has length 28 [2022-02-10 04:00:55,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:00:55,709 INFO L470 AbstractCegarLoop]: Abstraction has 20518 states and 55472 transitions. [2022-02-10 04:00:55,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) 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 04:00:55,709 INFO L276 IsEmpty]: Start isEmpty. Operand 20518 states and 55472 transitions. [2022-02-10 04:00:55,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-10 04:00:55,734 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:00:55,734 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 04:00:55,756 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-02-10 04:00:55,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-02-10 04:00:55,935 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:00:55,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:00:55,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1818589124, now seen corresponding path program 55 times [2022-02-10 04:00:55,935 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:00:55,935 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961132065] [2022-02-10 04:00:55,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:00:55,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:00:55,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:00:55,982 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:55,983 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:00:55,983 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961132065] [2022-02-10 04:00:55,983 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961132065] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:00:55,983 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914997396] [2022-02-10 04:00:55,983 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 04:00:55,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:00:55,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:00:55,984 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:00:55,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-02-10 04:00:56,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:00:56,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 04:00:56,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:00:56,074 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:56,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:00:56,154 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:56,155 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914997396] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:00:56,155 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:00:56,155 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 16 [2022-02-10 04:00:56,155 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113153289] [2022-02-10 04:00:56,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:00:56,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-10 04:00:56,155 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:00:56,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-10 04:00:56,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-02-10 04:00:56,156 INFO L87 Difference]: Start difference. First operand 20518 states and 55472 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 04:00:56,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:00:56,807 INFO L93 Difference]: Finished difference Result 24625 states and 64806 transitions. [2022-02-10 04:00:56,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-10 04:00:56,807 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 28 [2022-02-10 04:00:56,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:00:56,855 INFO L225 Difference]: With dead ends: 24625 [2022-02-10 04:00:56,855 INFO L226 Difference]: Without dead ends: 24622 [2022-02-10 04:00:56,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=629, Invalid=2127, Unknown=0, NotChecked=0, Total=2756 [2022-02-10 04:00:56,856 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 277 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 04:00:56,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 221 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 698 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 04:00:56,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24622 states. [2022-02-10 04:00:57,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24622 to 20518. [2022-02-10 04:00:57,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20518 states, 20517 states have (on average 2.7036603791977383) internal successors, (55471), 20517 states have internal predecessors, (55471), 0 states have call successors, (0), 0 states 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 04:00:57,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20518 states to 20518 states and 55471 transitions. [2022-02-10 04:00:57,261 INFO L78 Accepts]: Start accepts. Automaton has 20518 states and 55471 transitions. Word has length 28 [2022-02-10 04:00:57,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:00:57,261 INFO L470 AbstractCegarLoop]: Abstraction has 20518 states and 55471 transitions. [2022-02-10 04:00:57,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 04:00:57,262 INFO L276 IsEmpty]: Start isEmpty. Operand 20518 states and 55471 transitions. [2022-02-10 04:00:57,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-10 04:00:57,286 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:00:57,286 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 04:00:57,306 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-02-10 04:00:57,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:00:57,486 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:00:57,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:00:57,486 INFO L85 PathProgramCache]: Analyzing trace with hash 458369280, now seen corresponding path program 56 times [2022-02-10 04:00:57,487 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:00:57,487 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338868641] [2022-02-10 04:00:57,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:00:57,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:00:57,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:00:57,531 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:57,531 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:00:57,531 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338868641] [2022-02-10 04:00:57,531 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338868641] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:00:57,531 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768824752] [2022-02-10 04:00:57,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 04:00:57,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:00:57,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:00:57,533 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:00:57,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-02-10 04:00:57,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 04:00:57,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 04:00:57,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 04:00:57,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:00:57,648 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:57,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:00:57,740 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:00:57,740 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768824752] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:00:57,740 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:00:57,741 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 18 [2022-02-10 04:00:57,741 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371988132] [2022-02-10 04:00:57,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:00:57,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 04:00:57,741 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:00:57,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 04:00:57,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-02-10 04:00:57,741 INFO L87 Difference]: Start difference. First operand 20518 states and 55471 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:00:59,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:00:59,133 INFO L93 Difference]: Finished difference Result 34248 states and 86037 transitions. [2022-02-10 04:00:59,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-02-10 04:00:59,133 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-10 04:00:59,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:00:59,229 INFO L225 Difference]: With dead ends: 34248 [2022-02-10 04:00:59,229 INFO L226 Difference]: Without dead ends: 34245 [2022-02-10 04:00:59,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3214 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1989, Invalid=6941, Unknown=0, NotChecked=0, Total=8930 [2022-02-10 04:00:59,231 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 483 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 977 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 1062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-10 04:00:59,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [483 Valid, 276 Invalid, 1062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 977 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-10 04:00:59,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34245 states. [2022-02-10 04:00:59,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34245 to 20681. [2022-02-10 04:00:59,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20681 states, 20680 states have (on average 2.6961315280464215) internal successors, (55756), 20680 states have internal predecessors, (55756), 0 states have call successors, (0), 0 states 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 04:00:59,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20681 states to 20681 states and 55756 transitions. [2022-02-10 04:00:59,957 INFO L78 Accepts]: Start accepts. Automaton has 20681 states and 55756 transitions. Word has length 28 [2022-02-10 04:00:59,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:00:59,957 INFO L470 AbstractCegarLoop]: Abstraction has 20681 states and 55756 transitions. [2022-02-10 04:00:59,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:00:59,957 INFO L276 IsEmpty]: Start isEmpty. Operand 20681 states and 55756 transitions. [2022-02-10 04:00:59,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-10 04:00:59,980 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:00:59,980 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 04:00:59,995 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-02-10 04:01:00,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:01:00,181 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:01:00,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:01:00,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1314442386, now seen corresponding path program 57 times [2022-02-10 04:01:00,182 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:01:00,182 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255886164] [2022-02-10 04:01:00,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:01:00,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:01:00,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:01:00,233 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:01:00,234 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:01:00,234 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255886164] [2022-02-10 04:01:00,234 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255886164] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:01:00,234 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397478224] [2022-02-10 04:01:00,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 04:01:00,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:01:00,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:01:00,235 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:01:00,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-02-10 04:01:00,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 04:01:00,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 04:01:00,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 04:01:00,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:01:00,370 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:01:00,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:01:00,471 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:01:00,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397478224] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:01:00,472 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:01:00,472 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 20 [2022-02-10 04:01:00,472 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718743781] [2022-02-10 04:01:00,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:01:00,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 04:01:00,472 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:01:00,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 04:01:00,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-02-10 04:01:00,472 INFO L87 Difference]: Start difference. First operand 20681 states and 55756 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states 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 04:01:02,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:01:02,256 INFO L93 Difference]: Finished difference Result 26540 states and 68418 transitions. [2022-02-10 04:01:02,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-02-10 04:01:02,257 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-10 04:01:02,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:01:02,339 INFO L225 Difference]: With dead ends: 26540 [2022-02-10 04:01:02,339 INFO L226 Difference]: Without dead ends: 26540 [2022-02-10 04:01:02,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5565 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2559, Invalid=11247, Unknown=0, NotChecked=0, Total=13806 [2022-02-10 04:01:02,341 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 496 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 1192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-10 04:01:02,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 484 Invalid, 1192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1062 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-10 04:01:02,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26540 states. [2022-02-10 04:01:02,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26540 to 20708. [2022-02-10 04:01:02,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20708 states, 20707 states have (on average 2.69449944463225) internal successors, (55795), 20707 states have internal predecessors, (55795), 0 states have call successors, (0), 0 states 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 04:01:02,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20708 states to 20708 states and 55795 transitions. [2022-02-10 04:01:02,901 INFO L78 Accepts]: Start accepts. Automaton has 20708 states and 55795 transitions. Word has length 28 [2022-02-10 04:01:02,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:01:02,902 INFO L470 AbstractCegarLoop]: Abstraction has 20708 states and 55795 transitions. [2022-02-10 04:01:02,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states 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 04:01:02,902 INFO L276 IsEmpty]: Start isEmpty. Operand 20708 states and 55795 transitions. [2022-02-10 04:01:02,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-10 04:01:02,931 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:01:02,931 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 04:01:02,956 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-02-10 04:01:03,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:01:03,132 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:01:03,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:01:03,132 INFO L85 PathProgramCache]: Analyzing trace with hash -19718532, now seen corresponding path program 35 times [2022-02-10 04:01:03,132 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:01:03,132 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100704372] [2022-02-10 04:01:03,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:01:03,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:01:03,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:01:03,182 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:01:03,182 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:01:03,182 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100704372] [2022-02-10 04:01:03,183 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100704372] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:01:03,183 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456314593] [2022-02-10 04:01:03,183 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 04:01:03,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:01:03,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:01:03,184 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:01:03,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-02-10 04:01:03,209 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 04:01:03,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 04:01:03,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 04:01:03,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:01:03,288 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:01:03,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:01:03,356 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:01:03,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456314593] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:01:03,356 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:01:03,356 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 15 [2022-02-10 04:01:03,356 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754084632] [2022-02-10 04:01:03,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:01:03,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-10 04:01:03,356 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:01:03,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-10 04:01:03,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-02-10 04:01:03,357 INFO L87 Difference]: Start difference. First operand 20708 states and 55795 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states 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 04:01:03,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:01:03,920 INFO L93 Difference]: Finished difference Result 24947 states and 66451 transitions. [2022-02-10 04:01:03,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-10 04:01:03,921 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-10 04:01:03,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:01:03,990 INFO L225 Difference]: With dead ends: 24947 [2022-02-10 04:01:03,990 INFO L226 Difference]: Without dead ends: 24947 [2022-02-10 04:01:03,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=500, Invalid=1480, Unknown=0, NotChecked=0, Total=1980 [2022-02-10 04:01:03,991 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 151 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 04:01:03,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 164 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 04:01:04,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24947 states. [2022-02-10 04:01:04,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24947 to 20730. [2022-02-10 04:01:04,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20730 states, 20729 states have (on average 2.6938106035023397) internal successors, (55840), 20729 states have internal predecessors, (55840), 0 states have call successors, (0), 0 states 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 04:01:04,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20730 states to 20730 states and 55840 transitions. [2022-02-10 04:01:04,457 INFO L78 Accepts]: Start accepts. Automaton has 20730 states and 55840 transitions. Word has length 28 [2022-02-10 04:01:04,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:01:04,457 INFO L470 AbstractCegarLoop]: Abstraction has 20730 states and 55840 transitions. [2022-02-10 04:01:04,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states 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 04:01:04,457 INFO L276 IsEmpty]: Start isEmpty. Operand 20730 states and 55840 transitions. [2022-02-10 04:01:04,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-10 04:01:04,483 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:01:04,483 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 04:01:04,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-02-10 04:01:04,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:01:04,684 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:01:04,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:01:04,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1131806788, now seen corresponding path program 36 times [2022-02-10 04:01:04,684 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:01:04,684 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627776810] [2022-02-10 04:01:04,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:01:04,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:01:04,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:01:04,728 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:01:04,728 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:01:04,728 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627776810] [2022-02-10 04:01:04,728 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627776810] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:01:04,728 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141865565] [2022-02-10 04:01:04,728 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 04:01:04,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:01:04,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:01:04,731 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:01:04,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-02-10 04:01:04,753 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-10 04:01:04,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 04:01:04,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 04:01:04,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:01:04,818 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:01:04,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:01:04,886 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:01:04,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141865565] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:01:04,886 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:01:04,886 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 15 [2022-02-10 04:01:04,886 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632339546] [2022-02-10 04:01:04,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:01:04,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-10 04:01:04,886 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:01:04,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-10 04:01:04,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-02-10 04:01:04,887 INFO L87 Difference]: Start difference. First operand 20730 states and 55840 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states 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 04:01:05,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:01:05,464 INFO L93 Difference]: Finished difference Result 24904 states and 66336 transitions. [2022-02-10 04:01:05,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-10 04:01:05,464 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-10 04:01:05,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:01:05,529 INFO L225 Difference]: With dead ends: 24904 [2022-02-10 04:01:05,529 INFO L226 Difference]: Without dead ends: 24901 [2022-02-10 04:01:05,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=447, Invalid=1623, Unknown=0, NotChecked=0, Total=2070 [2022-02-10 04:01:05,530 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 242 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 04:01:05,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 144 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 04:01:05,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24901 states. [2022-02-10 04:01:05,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24901 to 20716. [2022-02-10 04:01:05,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20716 states, 20715 states have (on average 2.694182959208303) internal successors, (55810), 20715 states have internal predecessors, (55810), 0 states have call successors, (0), 0 states 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 04:01:06,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20716 states to 20716 states and 55810 transitions. [2022-02-10 04:01:06,003 INFO L78 Accepts]: Start accepts. Automaton has 20716 states and 55810 transitions. Word has length 28 [2022-02-10 04:01:06,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:01:06,004 INFO L470 AbstractCegarLoop]: Abstraction has 20716 states and 55810 transitions. [2022-02-10 04:01:06,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states 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 04:01:06,004 INFO L276 IsEmpty]: Start isEmpty. Operand 20716 states and 55810 transitions. [2022-02-10 04:01:06,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-10 04:01:06,028 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:01:06,028 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 04:01:06,044 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-02-10 04:01:06,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:01:06,229 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:01:06,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:01:06,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1528809992, now seen corresponding path program 58 times [2022-02-10 04:01:06,229 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:01:06,229 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732681172] [2022-02-10 04:01:06,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:01:06,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:01:06,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:01:06,269 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:01:06,269 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:01:06,269 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732681172] [2022-02-10 04:01:06,269 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732681172] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:01:06,269 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422257451] [2022-02-10 04:01:06,269 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 04:01:06,269 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:01:06,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:01:06,270 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:01:06,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-02-10 04:01:06,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 04:01:06,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 04:01:06,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 04:01:06,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:01:06,389 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 04:01:06,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:01:06,492 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:01:06,493 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422257451] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:01:06,493 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:01:06,493 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 20 [2022-02-10 04:01:06,493 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194673079] [2022-02-10 04:01:06,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:01:06,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 04:01:06,493 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:01:06,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 04:01:06,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2022-02-10 04:01:06,494 INFO L87 Difference]: Start difference. First operand 20716 states and 55810 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:01:08,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:01:08,244 INFO L93 Difference]: Finished difference Result 30365 states and 78060 transitions. [2022-02-10 04:01:08,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-02-10 04:01:08,244 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-10 04:01:08,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:01:08,321 INFO L225 Difference]: With dead ends: 30365 [2022-02-10 04:01:08,321 INFO L226 Difference]: Without dead ends: 30365 [2022-02-10 04:01:08,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4878 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2477, Invalid=9733, Unknown=0, NotChecked=0, Total=12210 [2022-02-10 04:01:08,323 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 529 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 1067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-10 04:01:08,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [529 Valid, 322 Invalid, 1067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 921 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-10 04:01:08,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30365 states. [2022-02-10 04:01:08,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30365 to 20796. [2022-02-10 04:01:08,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20796 states, 20795 states have (on average 2.6921856215436404) internal successors, (55984), 20795 states have internal predecessors, (55984), 0 states have call successors, (0), 0 states 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 04:01:08,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20796 states to 20796 states and 55984 transitions. [2022-02-10 04:01:08,869 INFO L78 Accepts]: Start accepts. Automaton has 20796 states and 55984 transitions. Word has length 28 [2022-02-10 04:01:08,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:01:08,870 INFO L470 AbstractCegarLoop]: Abstraction has 20796 states and 55984 transitions. [2022-02-10 04:01:08,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:01:08,870 INFO L276 IsEmpty]: Start isEmpty. Operand 20796 states and 55984 transitions. [2022-02-10 04:01:08,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-10 04:01:08,893 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:01:08,893 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 04:01:08,908 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-02-10 04:01:09,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2022-02-10 04:01:09,094 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:01:09,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:01:09,094 INFO L85 PathProgramCache]: Analyzing trace with hash 816116276, now seen corresponding path program 59 times [2022-02-10 04:01:09,094 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:01:09,094 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632598344] [2022-02-10 04:01:09,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:01:09,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:01:09,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:01:09,138 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:01:09,138 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:01:09,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632598344] [2022-02-10 04:01:09,139 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632598344] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:01:09,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250925440] [2022-02-10 04:01:09,139 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 04:01:09,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:01:09,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:01:09,140 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:01:09,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-02-10 04:01:09,161 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 04:01:09,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 04:01:09,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-10 04:01:09,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:01:09,220 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:01:09,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:01:09,276 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:01:09,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250925440] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:01:09,276 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:01:09,276 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 13 [2022-02-10 04:01:09,276 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045083517] [2022-02-10 04:01:09,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:01:09,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-10 04:01:09,277 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:01:09,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-10 04:01:09,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-02-10 04:01:09,277 INFO L87 Difference]: Start difference. First operand 20796 states and 55984 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:01:09,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:01:09,627 INFO L93 Difference]: Finished difference Result 29659 states and 78279 transitions. [2022-02-10 04:01:09,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-10 04:01:09,628 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-10 04:01:09,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:01:09,692 INFO L225 Difference]: With dead ends: 29659 [2022-02-10 04:01:09,692 INFO L226 Difference]: Without dead ends: 29641 [2022-02-10 04:01:09,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2022-02-10 04:01:09,692 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 146 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 04:01:09,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 157 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 04:01:09,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29641 states. [2022-02-10 04:01:10,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29641 to 24143. [2022-02-10 04:01:10,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24143 states, 24142 states have (on average 2.6935630850799437) internal successors, (65028), 24142 states have internal predecessors, (65028), 0 states have call successors, (0), 0 states 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 04:01:10,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24143 states to 24143 states and 65028 transitions. [2022-02-10 04:01:10,180 INFO L78 Accepts]: Start accepts. Automaton has 24143 states and 65028 transitions. Word has length 28 [2022-02-10 04:01:10,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:01:10,180 INFO L470 AbstractCegarLoop]: Abstraction has 24143 states and 65028 transitions. [2022-02-10 04:01:10,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:01:10,181 INFO L276 IsEmpty]: Start isEmpty. Operand 24143 states and 65028 transitions. [2022-02-10 04:01:10,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-10 04:01:10,207 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:01:10,207 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 04:01:10,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-02-10 04:01:10,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-02-10 04:01:10,409 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:01:10,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:01:10,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1743087800, now seen corresponding path program 60 times [2022-02-10 04:01:10,409 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:01:10,409 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569802189] [2022-02-10 04:01:10,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:01:10,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:01:10,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:01:10,440 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:01:10,440 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:01:10,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569802189] [2022-02-10 04:01:10,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569802189] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:01:10,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193260639] [2022-02-10 04:01:10,440 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 04:01:10,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:01:10,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:01:10,441 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:01:10,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-02-10 04:01:10,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 04:01:10,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 04:01:10,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-10 04:01:10,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:01:10,541 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 04:01:10,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:01:10,638 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:01:10,638 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193260639] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:01:10,638 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:01:10,638 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 15 [2022-02-10 04:01:10,638 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156199902] [2022-02-10 04:01:10,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:01:10,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-10 04:01:10,638 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:01:10,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-10 04:01:10,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2022-02-10 04:01:10,639 INFO L87 Difference]: Start difference. First operand 24143 states and 65028 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:01:11,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:01:11,211 INFO L93 Difference]: Finished difference Result 46801 states and 116769 transitions. [2022-02-10 04:01:11,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-10 04:01:11,211 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-10 04:01:11,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:01:11,319 INFO L225 Difference]: With dead ends: 46801 [2022-02-10 04:01:11,320 INFO L226 Difference]: Without dead ends: 46801 [2022-02-10 04:01:11,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=462, Invalid=944, Unknown=0, NotChecked=0, Total=1406 [2022-02-10 04:01:11,320 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 315 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 04:01:11,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 113 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 04:01:11,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46801 states. [2022-02-10 04:01:12,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46801 to 30813. [2022-02-10 04:01:12,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30813 states, 30812 states have (on average 2.725431650006491) internal successors, (83976), 30812 states have internal predecessors, (83976), 0 states have call successors, (0), 0 states 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 04:01:12,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30813 states to 30813 states and 83976 transitions. [2022-02-10 04:01:12,140 INFO L78 Accepts]: Start accepts. Automaton has 30813 states and 83976 transitions. Word has length 28 [2022-02-10 04:01:12,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:01:12,140 INFO L470 AbstractCegarLoop]: Abstraction has 30813 states and 83976 transitions. [2022-02-10 04:01:12,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:01:12,140 INFO L276 IsEmpty]: Start isEmpty. Operand 30813 states and 83976 transitions. [2022-02-10 04:01:12,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-10 04:01:12,178 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:01:12,178 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 04:01:12,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-02-10 04:01:12,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:01:12,379 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:01:12,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:01:12,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1141900804, now seen corresponding path program 61 times [2022-02-10 04:01:12,380 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:01:12,380 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821878639] [2022-02-10 04:01:12,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:01:12,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:01:12,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:01:12,418 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:01:12,418 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:01:12,418 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821878639] [2022-02-10 04:01:12,418 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821878639] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:01:12,418 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142817992] [2022-02-10 04:01:12,418 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 04:01:12,418 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:01:12,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:01:12,419 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:01:12,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-02-10 04:01:12,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:01:12,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 04:01:12,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:01:12,523 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 04:01:12,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:01:12,610 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:01:12,610 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142817992] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:01:12,610 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:01:12,610 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 18 [2022-02-10 04:01:12,610 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128305894] [2022-02-10 04:01:12,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:01:12,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 04:01:12,611 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:01:12,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 04:01:12,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-02-10 04:01:12,611 INFO L87 Difference]: Start difference. First operand 30813 states and 83976 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:01:13,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:01:13,967 INFO L93 Difference]: Finished difference Result 42959 states and 112466 transitions. [2022-02-10 04:01:13,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-02-10 04:01:13,967 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-10 04:01:13,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:01:14,070 INFO L225 Difference]: With dead ends: 42959 [2022-02-10 04:01:14,070 INFO L226 Difference]: Without dead ends: 42959 [2022-02-10 04:01:14,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3554 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2004, Invalid=6926, Unknown=0, NotChecked=0, Total=8930 [2022-02-10 04:01:14,072 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 504 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-10 04:01:14,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [504 Valid, 226 Invalid, 921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 780 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-10 04:01:14,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42959 states. [2022-02-10 04:01:14,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42959 to 30866. [2022-02-10 04:01:14,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30866 states, 30865 states have (on average 2.724412765268103) internal successors, (84089), 30865 states have internal predecessors, (84089), 0 states have call successors, (0), 0 states 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 04:01:14,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30866 states to 30866 states and 84089 transitions. [2022-02-10 04:01:14,812 INFO L78 Accepts]: Start accepts. Automaton has 30866 states and 84089 transitions. Word has length 28 [2022-02-10 04:01:14,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:01:14,813 INFO L470 AbstractCegarLoop]: Abstraction has 30866 states and 84089 transitions. [2022-02-10 04:01:14,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:01:14,813 INFO L276 IsEmpty]: Start isEmpty. Operand 30866 states and 84089 transitions. [2022-02-10 04:01:14,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-10 04:01:14,847 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:01:14,847 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 04:01:14,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-02-10 04:01:15,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:01:15,051 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:01:15,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:01:15,052 INFO L85 PathProgramCache]: Analyzing trace with hash -2042847176, now seen corresponding path program 62 times [2022-02-10 04:01:15,052 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:01:15,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957486533] [2022-02-10 04:01:15,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:01:15,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:01:15,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:01:15,101 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:01:15,101 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:01:15,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957486533] [2022-02-10 04:01:15,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957486533] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:01:15,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060332653] [2022-02-10 04:01:15,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 04:01:15,101 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:01:15,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:01:15,102 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:01:15,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-02-10 04:01:15,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 04:01:15,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 04:01:15,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-10 04:01:15,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:01:15,181 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:01:15,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:01:15,235 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:01:15,235 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060332653] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:01:15,235 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:01:15,235 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2022-02-10 04:01:15,235 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138192334] [2022-02-10 04:01:15,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:01:15,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-10 04:01:15,235 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:01:15,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-10 04:01:15,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-02-10 04:01:15,236 INFO L87 Difference]: Start difference. First operand 30866 states and 84089 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:01:15,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:01:15,570 INFO L93 Difference]: Finished difference Result 32799 states and 87349 transitions. [2022-02-10 04:01:15,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-10 04:01:15,571 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-10 04:01:15,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:01:15,640 INFO L225 Difference]: With dead ends: 32799 [2022-02-10 04:01:15,640 INFO L226 Difference]: Without dead ends: 32799 [2022-02-10 04:01:15,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=175, Invalid=425, Unknown=0, NotChecked=0, Total=600 [2022-02-10 04:01:15,641 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 148 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 04:01:15,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 130 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 04:01:15,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32799 states. [2022-02-10 04:01:16,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32799 to 30374. [2022-02-10 04:01:16,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30374 states, 30373 states have (on average 2.71886214730188) internal successors, (82580), 30373 states have internal predecessors, (82580), 0 states have call successors, (0), 0 states 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 04:01:16,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30374 states to 30374 states and 82580 transitions. [2022-02-10 04:01:16,348 INFO L78 Accepts]: Start accepts. Automaton has 30374 states and 82580 transitions. Word has length 28 [2022-02-10 04:01:16,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:01:16,348 INFO L470 AbstractCegarLoop]: Abstraction has 30374 states and 82580 transitions. [2022-02-10 04:01:16,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:01:16,349 INFO L276 IsEmpty]: Start isEmpty. Operand 30374 states and 82580 transitions. [2022-02-10 04:01:16,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-10 04:01:16,381 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:01:16,381 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 04:01:16,396 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-02-10 04:01:16,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-02-10 04:01:16,582 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:01:16,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:01:16,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1371309188, now seen corresponding path program 63 times [2022-02-10 04:01:16,582 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:01:16,582 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195911993] [2022-02-10 04:01:16,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:01:16,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:01:16,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:01:16,639 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:01:16,639 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:01:16,639 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195911993] [2022-02-10 04:01:16,640 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195911993] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:01:16,640 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122689523] [2022-02-10 04:01:16,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 04:01:16,640 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:01:16,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:01:16,641 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:01:16,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-02-10 04:01:16,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 04:01:16,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 04:01:16,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 04:01:16,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:01:16,762 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 04:01:16,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:01:16,869 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:01:16,869 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122689523] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:01:16,870 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:01:16,870 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 18 [2022-02-10 04:01:16,870 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795822699] [2022-02-10 04:01:16,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:01:16,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 04:01:16,870 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:01:16,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 04:01:16,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2022-02-10 04:01:16,871 INFO L87 Difference]: Start difference. First operand 30374 states and 82580 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:01:18,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:01:18,243 INFO L93 Difference]: Finished difference Result 43288 states and 112461 transitions. [2022-02-10 04:01:18,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-02-10 04:01:18,244 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-10 04:01:18,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:01:18,364 INFO L225 Difference]: With dead ends: 43288 [2022-02-10 04:01:18,364 INFO L226 Difference]: Without dead ends: 43287 [2022-02-10 04:01:18,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2991 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1680, Invalid=6330, Unknown=0, NotChecked=0, Total=8010 [2022-02-10 04:01:18,365 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 526 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-10 04:01:18,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [526 Valid, 201 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-10 04:01:18,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43287 states. [2022-02-10 04:01:19,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43287 to 30444. [2022-02-10 04:01:19,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30444 states, 30443 states have (on average 2.7178004795847976) internal successors, (82738), 30443 states have internal predecessors, (82738), 0 states have call successors, (0), 0 states 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 04:01:19,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30444 states to 30444 states and 82738 transitions. [2022-02-10 04:01:19,261 INFO L78 Accepts]: Start accepts. Automaton has 30444 states and 82738 transitions. Word has length 28 [2022-02-10 04:01:19,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:01:19,261 INFO L470 AbstractCegarLoop]: Abstraction has 30444 states and 82738 transitions. [2022-02-10 04:01:19,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:01:19,261 INFO L276 IsEmpty]: Start isEmpty. Operand 30444 states and 82738 transitions. [2022-02-10 04:01:19,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-10 04:01:19,297 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:01:19,297 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 04:01:19,312 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-02-10 04:01:19,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:01:19,498 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:01:19,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:01:19,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1591139448, now seen corresponding path program 64 times [2022-02-10 04:01:19,498 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:01:19,498 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131225121] [2022-02-10 04:01:19,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:01:19,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:01:19,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:01:19,527 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 04:01:19,527 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:01:19,527 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131225121] [2022-02-10 04:01:19,527 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131225121] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:01:19,527 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801116930] [2022-02-10 04:01:19,527 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 04:01:19,527 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:01:19,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:01:19,544 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:01:19,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-02-10 04:01:19,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 04:01:19,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 04:01:19,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-10 04:01:19,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:01:19,629 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 04:01:19,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:01:19,710 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 04:01:19,710 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801116930] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:01:19,710 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:01:19,710 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 13 [2022-02-10 04:01:19,711 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691727134] [2022-02-10 04:01:19,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:01:19,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-10 04:01:19,711 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:01:19,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-10 04:01:19,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-02-10 04:01:19,711 INFO L87 Difference]: Start difference. First operand 30444 states and 82738 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 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 04:01:20,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:01:20,124 INFO L93 Difference]: Finished difference Result 38748 states and 100124 transitions. [2022-02-10 04:01:20,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-10 04:01:20,125 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 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 28 [2022-02-10 04:01:20,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:01:20,231 INFO L225 Difference]: With dead ends: 38748 [2022-02-10 04:01:20,231 INFO L226 Difference]: Without dead ends: 38748 [2022-02-10 04:01:20,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=256, Invalid=556, Unknown=0, NotChecked=0, Total=812 [2022-02-10 04:01:20,231 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 234 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 04:01:20,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 83 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 04:01:20,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38748 states. [2022-02-10 04:01:21,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38748 to 31592. [2022-02-10 04:01:21,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31592 states, 31591 states have (on average 2.715995061884714) internal successors, (85801), 31591 states have internal predecessors, (85801), 0 states have call successors, (0), 0 states 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 04:01:21,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31592 states to 31592 states and 85801 transitions. [2022-02-10 04:01:21,208 INFO L78 Accepts]: Start accepts. Automaton has 31592 states and 85801 transitions. Word has length 28 [2022-02-10 04:01:21,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:01:21,208 INFO L470 AbstractCegarLoop]: Abstraction has 31592 states and 85801 transitions. [2022-02-10 04:01:21,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 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 04:01:21,208 INFO L276 IsEmpty]: Start isEmpty. Operand 31592 states and 85801 transitions. [2022-02-10 04:01:21,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-10 04:01:21,252 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:01:21,252 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 04:01:21,274 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-02-10 04:01:21,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:01:21,453 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:01:21,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:01:21,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1385005828, now seen corresponding path program 65 times [2022-02-10 04:01:21,454 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:01:21,454 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329398830] [2022-02-10 04:01:21,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:01:21,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:01:21,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:01:21,490 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:01:21,490 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:01:21,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329398830] [2022-02-10 04:01:21,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329398830] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:01:21,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618157750] [2022-02-10 04:01:21,490 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 04:01:21,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:01:21,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:01:21,492 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:01:21,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-02-10 04:01:21,513 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 04:01:21,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 04:01:21,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 04:01:21,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:01:21,587 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 04:01:21,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:01:21,672 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:01:21,672 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618157750] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:01:21,673 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:01:21,673 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 15 [2022-02-10 04:01:21,673 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970750889] [2022-02-10 04:01:21,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:01:21,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-10 04:01:21,673 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:01:21,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-10 04:01:21,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-02-10 04:01:21,673 INFO L87 Difference]: Start difference. First operand 31592 states and 85801 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:01:22,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:01:22,438 INFO L93 Difference]: Finished difference Result 40064 states and 106166 transitions. [2022-02-10 04:01:22,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-10 04:01:22,438 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-10 04:01:22,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:01:22,538 INFO L225 Difference]: With dead ends: 40064 [2022-02-10 04:01:22,539 INFO L226 Difference]: Without dead ends: 40064 [2022-02-10 04:01:22,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1195 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=816, Invalid=2844, Unknown=0, NotChecked=0, Total=3660 [2022-02-10 04:01:22,540 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 321 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 04:01:22,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 154 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 04:01:22,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40064 states. [2022-02-10 04:01:23,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40064 to 33038. [2022-02-10 04:01:23,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33038 states, 33037 states have (on average 2.7165904894512214) internal successors, (89748), 33037 states have internal predecessors, (89748), 0 states have call successors, (0), 0 states 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 04:01:23,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33038 states to 33038 states and 89748 transitions. [2022-02-10 04:01:23,437 INFO L78 Accepts]: Start accepts. Automaton has 33038 states and 89748 transitions. Word has length 28 [2022-02-10 04:01:23,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:01:23,438 INFO L470 AbstractCegarLoop]: Abstraction has 33038 states and 89748 transitions. [2022-02-10 04:01:23,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:01:23,438 INFO L276 IsEmpty]: Start isEmpty. Operand 33038 states and 89748 transitions. [2022-02-10 04:01:23,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-10 04:01:23,479 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:01:23,479 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 04:01:23,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-02-10 04:01:23,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-02-10 04:01:23,680 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:01:23,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:01:23,680 INFO L85 PathProgramCache]: Analyzing trace with hash -2012834492, now seen corresponding path program 66 times [2022-02-10 04:01:23,680 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:01:23,680 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344619093] [2022-02-10 04:01:23,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:01:23,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:01:23,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:01:23,716 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 04:01:23,716 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:01:23,716 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344619093] [2022-02-10 04:01:23,716 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344619093] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:01:23,716 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358846194] [2022-02-10 04:01:23,716 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 04:01:23,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:01:23,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:01:23,717 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:01:23,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-02-10 04:01:23,738 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 04:01:23,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 04:01:23,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 04:01:23,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:01:23,808 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 04:01:23,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:01:23,884 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 04:01:23,884 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358846194] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:01:23,884 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:01:23,884 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 15 [2022-02-10 04:01:23,885 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608501143] [2022-02-10 04:01:23,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:01:23,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-10 04:01:23,885 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:01:23,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-10 04:01:23,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-02-10 04:01:23,885 INFO L87 Difference]: Start difference. First operand 33038 states and 89748 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:01:24,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:01:24,565 INFO L93 Difference]: Finished difference Result 39942 states and 105963 transitions. [2022-02-10 04:01:24,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-10 04:01:24,565 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-10 04:01:24,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:01:24,684 INFO L225 Difference]: With dead ends: 39942 [2022-02-10 04:01:24,684 INFO L226 Difference]: Without dead ends: 39941 [2022-02-10 04:01:24,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=612, Invalid=2144, Unknown=0, NotChecked=0, Total=2756 [2022-02-10 04:01:24,685 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 355 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 04:01:24,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 123 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 04:01:24,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39941 states. [2022-02-10 04:01:25,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39941 to 33038. [2022-02-10 04:01:25,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33038 states, 33037 states have (on average 2.7165602203589914) internal successors, (89747), 33037 states have internal predecessors, (89747), 0 states have call successors, (0), 0 states 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 04:01:25,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33038 states to 33038 states and 89747 transitions. [2022-02-10 04:01:25,665 INFO L78 Accepts]: Start accepts. Automaton has 33038 states and 89747 transitions. Word has length 28 [2022-02-10 04:01:25,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:01:25,665 INFO L470 AbstractCegarLoop]: Abstraction has 33038 states and 89747 transitions. [2022-02-10 04:01:25,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:01:25,666 INFO L276 IsEmpty]: Start isEmpty. Operand 33038 states and 89747 transitions. [2022-02-10 04:01:25,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-10 04:01:25,710 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:01:25,710 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 04:01:25,725 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-02-10 04:01:25,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-02-10 04:01:25,911 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:01:25,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:01:25,911 INFO L85 PathProgramCache]: Analyzing trace with hash 9058752, now seen corresponding path program 67 times [2022-02-10 04:01:25,911 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:01:25,911 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589957680] [2022-02-10 04:01:25,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:01:25,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:01:25,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:01:25,952 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:01:25,952 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:01:25,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589957680] [2022-02-10 04:01:25,952 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589957680] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:01:25,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793376195] [2022-02-10 04:01:25,952 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 04:01:25,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:01:25,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:01:25,953 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:01:25,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-02-10 04:01:25,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:01:25,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 04:01:25,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:01:26,045 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 04:01:26,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:01:26,120 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:01:26,120 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793376195] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:01:26,121 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:01:26,121 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 16 [2022-02-10 04:01:26,121 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101420473] [2022-02-10 04:01:26,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:01:26,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-10 04:01:26,121 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:01:26,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-10 04:01:26,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-02-10 04:01:26,121 INFO L87 Difference]: Start difference. First operand 33038 states and 89747 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 04:01:27,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:01:27,371 INFO L93 Difference]: Finished difference Result 41151 states and 108127 transitions. [2022-02-10 04:01:27,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-02-10 04:01:27,371 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 28 [2022-02-10 04:01:27,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:01:27,483 INFO L225 Difference]: With dead ends: 41151 [2022-02-10 04:01:27,483 INFO L226 Difference]: Without dead ends: 41151 [2022-02-10 04:01:27,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2386 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1387, Invalid=4775, Unknown=0, NotChecked=0, Total=6162 [2022-02-10 04:01:27,483 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 417 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 04:01:27,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 279 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 04:01:27,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41151 states. [2022-02-10 04:01:28,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41151 to 33126. [2022-02-10 04:01:28,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33126 states, 33125 states have (on average 2.715230188679245) internal successors, (89942), 33125 states have internal predecessors, (89942), 0 states have call successors, (0), 0 states 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 04:01:28,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33126 states to 33126 states and 89942 transitions. [2022-02-10 04:01:28,361 INFO L78 Accepts]: Start accepts. Automaton has 33126 states and 89942 transitions. Word has length 28 [2022-02-10 04:01:28,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:01:28,361 INFO L470 AbstractCegarLoop]: Abstraction has 33126 states and 89942 transitions. [2022-02-10 04:01:28,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 04:01:28,361 INFO L276 IsEmpty]: Start isEmpty. Operand 33126 states and 89942 transitions. [2022-02-10 04:01:28,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-10 04:01:28,405 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:01:28,405 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 04:01:28,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-02-10 04:01:28,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:01:28,605 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:01:28,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:01:28,606 INFO L85 PathProgramCache]: Analyzing trace with hash -336891904, now seen corresponding path program 68 times [2022-02-10 04:01:28,606 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:01:28,606 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815673027] [2022-02-10 04:01:28,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:01:28,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:01:28,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:01:28,648 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:01:28,648 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:01:28,648 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815673027] [2022-02-10 04:01:28,648 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815673027] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:01:28,648 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656074541] [2022-02-10 04:01:28,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 04:01:28,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:01:28,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:01:28,649 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:01:28,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-02-10 04:01:28,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 04:01:28,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 04:01:28,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 04:01:28,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:01:28,741 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 04:01:28,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:01:28,817 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:01:28,817 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656074541] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:01:28,817 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:01:28,818 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 16 [2022-02-10 04:01:28,818 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241402477] [2022-02-10 04:01:28,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:01:28,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-10 04:01:28,818 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:01:28,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-10 04:01:28,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-02-10 04:01:28,818 INFO L87 Difference]: Start difference. First operand 33126 states and 89942 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 04:01:29,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:01:29,652 INFO L93 Difference]: Finished difference Result 40015 states and 106136 transitions. [2022-02-10 04:01:29,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-10 04:01:29,652 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 28 [2022-02-10 04:01:29,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:01:29,747 INFO L225 Difference]: With dead ends: 40015 [2022-02-10 04:01:29,748 INFO L226 Difference]: Without dead ends: 40012 [2022-02-10 04:01:29,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=674, Invalid=2406, Unknown=0, NotChecked=0, Total=3080 [2022-02-10 04:01:29,748 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 306 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 04:01:29,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 171 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 04:01:29,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40012 states. [2022-02-10 04:01:30,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40012 to 33036. [2022-02-10 04:01:30,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33036 states, 33035 states have (on average 2.7164825185409414) internal successors, (89739), 33035 states have internal predecessors, (89739), 0 states have call successors, (0), 0 states 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 04:01:30,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33036 states to 33036 states and 89739 transitions. [2022-02-10 04:01:30,599 INFO L78 Accepts]: Start accepts. Automaton has 33036 states and 89739 transitions. Word has length 28 [2022-02-10 04:01:30,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:01:30,599 INFO L470 AbstractCegarLoop]: Abstraction has 33036 states and 89739 transitions. [2022-02-10 04:01:30,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 04:01:30,600 INFO L276 IsEmpty]: Start isEmpty. Operand 33036 states and 89739 transitions. [2022-02-10 04:01:30,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-10 04:01:30,639 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:01:30,639 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 04:01:30,663 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-02-10 04:01:30,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:01:30,840 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:01:30,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:01:30,840 INFO L85 PathProgramCache]: Analyzing trace with hash -307389576, now seen corresponding path program 69 times [2022-02-10 04:01:30,840 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:01:30,840 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059081713] [2022-02-10 04:01:30,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:01:30,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:01:30,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:01:30,883 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 04:01:30,883 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:01:30,883 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059081713] [2022-02-10 04:01:30,884 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059081713] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:01:30,884 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149429816] [2022-02-10 04:01:30,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 04:01:30,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:01:30,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:01:30,885 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:01:30,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-02-10 04:01:30,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 04:01:30,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 04:01:30,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-10 04:01:30,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:01:30,981 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 04:01:30,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:01:31,054 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 04:01:31,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149429816] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:01:31,055 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:01:31,055 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2022-02-10 04:01:31,055 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132724883] [2022-02-10 04:01:31,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:01:31,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-10 04:01:31,055 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:01:31,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-10 04:01:31,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-02-10 04:01:31,056 INFO L87 Difference]: Start difference. First operand 33036 states and 89739 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:01:31,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:01:31,579 INFO L93 Difference]: Finished difference Result 39132 states and 101721 transitions. [2022-02-10 04:01:31,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-10 04:01:31,580 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-10 04:01:31,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:01:31,707 INFO L225 Difference]: With dead ends: 39132 [2022-02-10 04:01:31,708 INFO L226 Difference]: Without dead ends: 39132 [2022-02-10 04:01:31,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=195, Invalid=455, Unknown=0, NotChecked=0, Total=650 [2022-02-10 04:01:31,708 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 172 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 04:01:31,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 71 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 04:01:31,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39132 states. [2022-02-10 04:01:32,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39132 to 33480. [2022-02-10 04:01:32,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33480 states, 33479 states have (on average 2.706741539472505) internal successors, (90619), 33479 states have internal predecessors, (90619), 0 states have call successors, (0), 0 states 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 04:01:32,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33480 states to 33480 states and 90619 transitions. [2022-02-10 04:01:32,768 INFO L78 Accepts]: Start accepts. Automaton has 33480 states and 90619 transitions. Word has length 28 [2022-02-10 04:01:32,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:01:32,768 INFO L470 AbstractCegarLoop]: Abstraction has 33480 states and 90619 transitions. [2022-02-10 04:01:32,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:01:32,768 INFO L276 IsEmpty]: Start isEmpty. Operand 33480 states and 90619 transitions. [2022-02-10 04:01:32,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-10 04:01:32,825 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:01:32,825 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 04:01:32,850 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-02-10 04:01:33,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2022-02-10 04:01:33,026 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:01:33,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:01:33,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1170477820, now seen corresponding path program 70 times [2022-02-10 04:01:33,027 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:01:33,027 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830178879] [2022-02-10 04:01:33,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:01:33,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:01:33,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:01:33,079 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:01:33,079 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:01:33,080 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830178879] [2022-02-10 04:01:33,080 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830178879] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:01:33,080 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632414558] [2022-02-10 04:01:33,080 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 04:01:33,080 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:01:33,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:01:33,081 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:01:33,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-02-10 04:01:33,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 04:01:33,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 04:01:33,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 04:01:33,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:01:33,180 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:01:33,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:01:33,249 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:01:33,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632414558] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:01:33,249 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:01:33,249 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-02-10 04:01:33,249 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646844850] [2022-02-10 04:01:33,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:01:33,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-10 04:01:33,250 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:01:33,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-10 04:01:33,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-02-10 04:01:33,250 INFO L87 Difference]: Start difference. First operand 33480 states and 90619 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) 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 04:01:34,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:01:34,122 INFO L93 Difference]: Finished difference Result 40338 states and 106567 transitions. [2022-02-10 04:01:34,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-10 04:01:34,122 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) 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 28 [2022-02-10 04:01:34,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:01:34,223 INFO L225 Difference]: With dead ends: 40338 [2022-02-10 04:01:34,224 INFO L226 Difference]: Without dead ends: 40338 [2022-02-10 04:01:34,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=661, Invalid=2309, Unknown=0, NotChecked=0, Total=2970 [2022-02-10 04:01:34,224 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 244 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 04:01:34,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 224 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 04:01:34,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40338 states. [2022-02-10 04:01:35,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40338 to 35142. [2022-02-10 04:01:35,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35142 states, 35141 states have (on average 2.6860647107367464) internal successors, (94391), 35141 states have internal predecessors, (94391), 0 states have call successors, (0), 0 states 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 04:01:35,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35142 states to 35142 states and 94391 transitions. [2022-02-10 04:01:35,187 INFO L78 Accepts]: Start accepts. Automaton has 35142 states and 94391 transitions. Word has length 28 [2022-02-10 04:01:35,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:01:35,187 INFO L470 AbstractCegarLoop]: Abstraction has 35142 states and 94391 transitions. [2022-02-10 04:01:35,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) 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 04:01:35,187 INFO L276 IsEmpty]: Start isEmpty. Operand 35142 states and 94391 transitions. [2022-02-10 04:01:35,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-10 04:01:35,238 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:01:35,238 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 04:01:35,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-02-10 04:01:35,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-02-10 04:01:35,439 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:01:35,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:01:35,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1275495940, now seen corresponding path program 71 times [2022-02-10 04:01:35,439 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:01:35,439 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187438832] [2022-02-10 04:01:35,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:01:35,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:01:35,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:01:35,479 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:01:35,479 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:01:35,479 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187438832] [2022-02-10 04:01:35,479 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187438832] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:01:35,479 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803696402] [2022-02-10 04:01:35,480 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 04:01:35,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:01:35,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:01:35,481 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:01:35,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-02-10 04:01:35,504 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 04:01:35,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 04:01:35,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-10 04:01:35,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:01:35,565 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:01:35,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:01:35,628 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:01:35,628 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803696402] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:01:35,628 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:01:35,628 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2022-02-10 04:01:35,628 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071451023] [2022-02-10 04:01:35,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:01:35,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-10 04:01:35,629 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:01:35,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-10 04:01:35,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-02-10 04:01:35,629 INFO L87 Difference]: Start difference. First operand 35142 states and 94391 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:01:36,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:01:36,095 INFO L93 Difference]: Finished difference Result 39822 states and 104966 transitions. [2022-02-10 04:01:36,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-10 04:01:36,095 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-10 04:01:36,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:01:36,210 INFO L225 Difference]: With dead ends: 39822 [2022-02-10 04:01:36,210 INFO L226 Difference]: Without dead ends: 39814 [2022-02-10 04:01:36,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=452, Unknown=0, NotChecked=0, Total=650 [2022-02-10 04:01:36,210 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 142 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 04:01:36,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 126 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 04:01:36,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39814 states. [2022-02-10 04:01:37,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39814 to 37789. [2022-02-10 04:01:37,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37789 states, 37788 states have (on average 2.6860378956282416) internal successors, (101500), 37788 states have internal predecessors, (101500), 0 states have call successors, (0), 0 states 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 04:01:37,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37789 states to 37789 states and 101500 transitions. [2022-02-10 04:01:37,231 INFO L78 Accepts]: Start accepts. Automaton has 37789 states and 101500 transitions. Word has length 28 [2022-02-10 04:01:37,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:01:37,231 INFO L470 AbstractCegarLoop]: Abstraction has 37789 states and 101500 transitions. [2022-02-10 04:01:37,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:01:37,231 INFO L276 IsEmpty]: Start isEmpty. Operand 37789 states and 101500 transitions. [2022-02-10 04:01:37,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-10 04:01:37,285 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:01:37,285 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 04:01:37,309 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-02-10 04:01:37,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:01:37,486 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:01:37,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:01:37,486 INFO L85 PathProgramCache]: Analyzing trace with hash -128888832, now seen corresponding path program 72 times [2022-02-10 04:01:37,486 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:01:37,486 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117913285] [2022-02-10 04:01:37,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:01:37,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:01:37,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:01:37,526 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:01:37,526 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:01:37,526 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117913285] [2022-02-10 04:01:37,526 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117913285] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:01:37,526 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291723993] [2022-02-10 04:01:37,526 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 04:01:37,526 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:01:37,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:01:37,527 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:01:37,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-02-10 04:01:37,550 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 04:01:37,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 04:01:37,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-10 04:01:37,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:01:37,612 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:01:37,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:01:37,673 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:01:37,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291723993] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:01:37,673 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:01:37,673 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2022-02-10 04:01:37,673 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534037928] [2022-02-10 04:01:37,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:01:37,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-10 04:01:37,674 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:01:37,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-10 04:01:37,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-02-10 04:01:37,674 INFO L87 Difference]: Start difference. First operand 37789 states and 101500 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:01:38,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:01:38,311 INFO L93 Difference]: Finished difference Result 40449 states and 106085 transitions. [2022-02-10 04:01:38,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-10 04:01:38,311 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-10 04:01:38,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:01:38,445 INFO L225 Difference]: With dead ends: 40449 [2022-02-10 04:01:38,445 INFO L226 Difference]: Without dead ends: 40449 [2022-02-10 04:01:38,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=413, Unknown=0, NotChecked=0, Total=600 [2022-02-10 04:01:38,446 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 130 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 04:01:38,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 167 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 04:01:38,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40449 states. [2022-02-10 04:01:39,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40449 to 37825. [2022-02-10 04:01:39,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37825 states, 37824 states have (on average 2.68242385786802) internal successors, (101460), 37824 states have internal predecessors, (101460), 0 states have call successors, (0), 0 states 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 04:01:39,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37825 states to 37825 states and 101460 transitions. [2022-02-10 04:01:39,448 INFO L78 Accepts]: Start accepts. Automaton has 37825 states and 101460 transitions. Word has length 28 [2022-02-10 04:01:39,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:01:39,448 INFO L470 AbstractCegarLoop]: Abstraction has 37825 states and 101460 transitions. [2022-02-10 04:01:39,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:01:39,448 INFO L276 IsEmpty]: Start isEmpty. Operand 37825 states and 101460 transitions. [2022-02-10 04:01:39,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-10 04:01:39,500 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:01:39,500 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 04:01:39,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-02-10 04:01:39,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:01:39,701 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:01:39,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:01:39,701 INFO L85 PathProgramCache]: Analyzing trace with hash 542649156, now seen corresponding path program 73 times [2022-02-10 04:01:39,701 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:01:39,701 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961674460] [2022-02-10 04:01:39,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:01:39,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:01:39,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:01:39,735 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:01:39,736 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:01:39,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961674460] [2022-02-10 04:01:39,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961674460] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:01:39,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895887045] [2022-02-10 04:01:39,736 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 04:01:39,736 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:01:39,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:01:39,737 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:01:39,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-02-10 04:01:39,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:01:39,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 04:01:39,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:01:39,822 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:01:39,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:01:39,889 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:01:39,890 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895887045] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:01:39,890 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:01:39,890 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-02-10 04:01:39,890 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591861289] [2022-02-10 04:01:39,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:01:39,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-10 04:01:39,890 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:01:39,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-10 04:01:39,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-02-10 04:01:39,890 INFO L87 Difference]: Start difference. First operand 37825 states and 101460 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) 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 04:01:40,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:01:40,722 INFO L93 Difference]: Finished difference Result 43346 states and 114426 transitions. [2022-02-10 04:01:40,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-10 04:01:40,722 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) 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 28 [2022-02-10 04:01:40,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:01:40,851 INFO L225 Difference]: With dead ends: 43346 [2022-02-10 04:01:40,851 INFO L226 Difference]: Without dead ends: 43344 [2022-02-10 04:01:40,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=1605, Unknown=0, NotChecked=0, Total=2070 [2022-02-10 04:01:40,852 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 263 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 04:01:40,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 182 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 04:01:40,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43344 states. [2022-02-10 04:01:41,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43344 to 37825. [2022-02-10 04:01:41,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37825 states, 37824 states have (on average 2.682370981387479) internal successors, (101458), 37824 states have internal predecessors, (101458), 0 states have call successors, (0), 0 states 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 04:01:41,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37825 states to 37825 states and 101458 transitions. [2022-02-10 04:01:41,899 INFO L78 Accepts]: Start accepts. Automaton has 37825 states and 101458 transitions. Word has length 28 [2022-02-10 04:01:41,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:01:41,899 INFO L470 AbstractCegarLoop]: Abstraction has 37825 states and 101458 transitions. [2022-02-10 04:01:41,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) 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 04:01:41,899 INFO L276 IsEmpty]: Start isEmpty. Operand 37825 states and 101458 transitions. [2022-02-10 04:01:41,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-10 04:01:41,943 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:01:41,943 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 04:01:41,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-02-10 04:01:42,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2022-02-10 04:01:42,144 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:01:42,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:01:42,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1155329728, now seen corresponding path program 74 times [2022-02-10 04:01:42,144 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:01:42,144 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571423752] [2022-02-10 04:01:42,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:01:42,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:01:42,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:01:42,185 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 04:01:42,185 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:01:42,185 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571423752] [2022-02-10 04:01:42,185 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571423752] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:01:42,185 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147589744] [2022-02-10 04:01:42,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 04:01:42,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:01:42,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:01:42,186 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:01:42,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-02-10 04:01:42,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 04:01:42,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 04:01:42,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-10 04:01:42,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:01:42,264 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 04:01:42,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:01:42,318 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 04:01:42,318 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147589744] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:01:42,318 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:01:42,318 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2022-02-10 04:01:42,318 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310558313] [2022-02-10 04:01:42,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:01:42,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-10 04:01:42,318 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:01:42,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-10 04:01:42,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-02-10 04:01:42,319 INFO L87 Difference]: Start difference. First operand 37825 states and 101458 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:01:42,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:01:42,693 INFO L93 Difference]: Finished difference Result 41876 states and 109921 transitions. [2022-02-10 04:01:42,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-10 04:01:42,693 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-10 04:01:42,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:01:42,953 INFO L225 Difference]: With dead ends: 41876 [2022-02-10 04:01:42,953 INFO L226 Difference]: Without dead ends: 41876 [2022-02-10 04:01:42,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=199, Invalid=451, Unknown=0, NotChecked=0, Total=650 [2022-02-10 04:01:42,954 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 116 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 04:01:42,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 133 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 04:01:42,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41876 states. [2022-02-10 04:01:43,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41876 to 38737. [2022-02-10 04:01:43,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38737 states, 38736 states have (on average 2.682285212722016) internal successors, (103901), 38736 states have internal predecessors, (103901), 0 states have call successors, (0), 0 states 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 04:01:43,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38737 states to 38737 states and 103901 transitions. [2022-02-10 04:01:43,829 INFO L78 Accepts]: Start accepts. Automaton has 38737 states and 103901 transitions. Word has length 28 [2022-02-10 04:01:43,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:01:43,829 INFO L470 AbstractCegarLoop]: Abstraction has 38737 states and 103901 transitions. [2022-02-10 04:01:43,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:01:43,829 INFO L276 IsEmpty]: Start isEmpty. Operand 38737 states and 103901 transitions. [2022-02-10 04:01:44,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-10 04:01:44,005 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:01:44,005 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 04:01:44,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-02-10 04:01:44,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-02-10 04:01:44,206 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:01:44,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:01:44,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1632581576, now seen corresponding path program 75 times [2022-02-10 04:01:44,206 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:01:44,206 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921462898] [2022-02-10 04:01:44,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:01:44,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:01:44,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:01:44,243 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 04:01:44,244 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:01:44,244 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921462898] [2022-02-10 04:01:44,244 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921462898] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:01:44,244 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403718254] [2022-02-10 04:01:44,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 04:01:44,244 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:01:44,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:01:44,245 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:01:44,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-02-10 04:01:44,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 04:01:44,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 04:01:44,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 04:01:44,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:01:44,335 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 04:01:44,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:01:44,406 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 04:01:44,407 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403718254] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:01:44,407 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:01:44,407 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-02-10 04:01:44,407 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420282370] [2022-02-10 04:01:44,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:01:44,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-10 04:01:44,407 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:01:44,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-10 04:01:44,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-02-10 04:01:44,407 INFO L87 Difference]: Start difference. First operand 38737 states and 103901 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) 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 04:01:45,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:01:45,051 INFO L93 Difference]: Finished difference Result 44536 states and 117625 transitions. [2022-02-10 04:01:45,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-10 04:01:45,051 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) 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 28 [2022-02-10 04:01:45,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:01:45,193 INFO L225 Difference]: With dead ends: 44536 [2022-02-10 04:01:45,193 INFO L226 Difference]: Without dead ends: 44533 [2022-02-10 04:01:45,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=423, Invalid=1469, Unknown=0, NotChecked=0, Total=1892 [2022-02-10 04:01:45,193 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 313 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 04:01:45,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 135 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 04:01:45,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44533 states. [2022-02-10 04:01:46,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44533 to 38775. [2022-02-10 04:01:46,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38775 states, 38774 states have (on average 2.681848661474184) internal successors, (103986), 38774 states have internal predecessors, (103986), 0 states have call successors, (0), 0 states 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 04:01:46,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38775 states to 38775 states and 103986 transitions. [2022-02-10 04:01:46,215 INFO L78 Accepts]: Start accepts. Automaton has 38775 states and 103986 transitions. Word has length 28 [2022-02-10 04:01:46,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:01:46,215 INFO L470 AbstractCegarLoop]: Abstraction has 38775 states and 103986 transitions. [2022-02-10 04:01:46,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) 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 04:01:46,215 INFO L276 IsEmpty]: Start isEmpty. Operand 38775 states and 103986 transitions. [2022-02-10 04:01:46,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-10 04:01:46,279 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:01:46,279 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 04:01:46,303 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-02-10 04:01:46,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-02-10 04:01:46,480 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:01:46,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:01:46,480 INFO L85 PathProgramCache]: Analyzing trace with hash -501936704, now seen corresponding path program 76 times [2022-02-10 04:01:46,480 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:01:46,480 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773634375] [2022-02-10 04:01:46,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:01:46,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:01:46,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:01:46,525 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:01:46,526 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:01:46,526 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773634375] [2022-02-10 04:01:46,526 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773634375] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:01:46,526 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092007440] [2022-02-10 04:01:46,526 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 04:01:46,526 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:01:46,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:01:46,527 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:01:46,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-02-10 04:01:46,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 04:01:46,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 04:01:46,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-10 04:01:46,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:01:46,620 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:01:46,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:01:46,682 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:01:46,683 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092007440] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:01:46,683 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:01:46,683 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 13 [2022-02-10 04:01:46,683 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018589789] [2022-02-10 04:01:46,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:01:46,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-10 04:01:46,683 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:01:46,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-10 04:01:46,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-02-10 04:01:46,684 INFO L87 Difference]: Start difference. First operand 38775 states and 103986 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:01:47,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:01:47,322 INFO L93 Difference]: Finished difference Result 42177 states and 110706 transitions. [2022-02-10 04:01:47,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-10 04:01:47,322 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-10 04:01:47,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:01:47,453 INFO L225 Difference]: With dead ends: 42177 [2022-02-10 04:01:47,453 INFO L226 Difference]: Without dead ends: 42177 [2022-02-10 04:01:47,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=251, Invalid=561, Unknown=0, NotChecked=0, Total=812 [2022-02-10 04:01:47,454 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 110 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 04:01:47,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 97 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 04:01:47,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42177 states. [2022-02-10 04:01:48,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42177 to 38778. [2022-02-10 04:01:48,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38778 states, 38777 states have (on average 2.681099620909302) internal successors, (103965), 38777 states have internal predecessors, (103965), 0 states have call successors, (0), 0 states 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 04:01:48,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38778 states to 38778 states and 103965 transitions. [2022-02-10 04:01:48,606 INFO L78 Accepts]: Start accepts. Automaton has 38778 states and 103965 transitions. Word has length 28 [2022-02-10 04:01:48,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:01:48,606 INFO L470 AbstractCegarLoop]: Abstraction has 38778 states and 103965 transitions. [2022-02-10 04:01:48,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:01:48,606 INFO L276 IsEmpty]: Start isEmpty. Operand 38778 states and 103965 transitions. [2022-02-10 04:01:48,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-10 04:01:48,659 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:01:48,659 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 04:01:48,685 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2022-02-10 04:01:48,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-02-10 04:01:48,860 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:01:48,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:01:48,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1773022916, now seen corresponding path program 77 times [2022-02-10 04:01:48,860 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:01:48,860 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244960374] [2022-02-10 04:01:48,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:01:48,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:01:48,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:01:48,901 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:01:48,901 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:01:48,901 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244960374] [2022-02-10 04:01:48,901 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244960374] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:01:48,901 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572028978] [2022-02-10 04:01:48,901 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 04:01:48,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:01:48,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:01:48,903 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:01:48,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-02-10 04:01:48,936 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 04:01:48,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 04:01:48,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 04:01:48,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:01:49,055 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:01:49,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:01:49,162 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 04:01:49,163 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572028978] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:01:49,163 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:01:49,163 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-02-10 04:01:49,163 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631124562] [2022-02-10 04:01:49,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:01:49,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 04:01:49,163 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:01:49,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 04:01:49,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-02-10 04:01:49,163 INFO L87 Difference]: Start difference. First operand 38778 states and 103965 transitions. Second operand has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 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 04:01:52,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:01:52,260 INFO L93 Difference]: Finished difference Result 74380 states and 195382 transitions. [2022-02-10 04:01:52,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2022-02-10 04:01:52,261 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-10 04:01:52,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:01:52,612 INFO L225 Difference]: With dead ends: 74380 [2022-02-10 04:01:52,612 INFO L226 Difference]: Without dead ends: 74380 [2022-02-10 04:01:52,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11496 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5662, Invalid=21398, Unknown=0, NotChecked=0, Total=27060 [2022-02-10 04:01:52,613 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 706 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 1507 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 706 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 1645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-10 04:01:52,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [706 Valid, 426 Invalid, 1645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1507 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-10 04:01:52,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74380 states. [2022-02-10 04:01:53,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74380 to 41812. [2022-02-10 04:01:53,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41812 states, 41811 states have (on average 2.704455765229246) internal successors, (113076), 41811 states have internal predecessors, (113076), 0 states have call successors, (0), 0 states 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 04:01:54,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41812 states to 41812 states and 113076 transitions. [2022-02-10 04:01:54,033 INFO L78 Accepts]: Start accepts. Automaton has 41812 states and 113076 transitions. Word has length 28 [2022-02-10 04:01:54,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:01:54,033 INFO L470 AbstractCegarLoop]: Abstraction has 41812 states and 113076 transitions. [2022-02-10 04:01:54,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 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 04:01:54,033 INFO L276 IsEmpty]: Start isEmpty. Operand 41812 states and 113076 transitions. [2022-02-10 04:01:54,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-10 04:01:54,092 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:01:54,092 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 04:01:54,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-02-10 04:01:54,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:01:54,294 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:01:54,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:01:54,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1254186894, now seen corresponding path program 78 times [2022-02-10 04:01:54,294 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:01:54,294 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582026164] [2022-02-10 04:01:54,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:01:54,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:01:54,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:01:54,349 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:01:54,350 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:01:54,350 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582026164] [2022-02-10 04:01:54,350 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582026164] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:01:54,350 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538349399] [2022-02-10 04:01:54,350 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 04:01:54,350 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:01:54,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:01:54,351 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:01:54,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-02-10 04:01:54,373 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 04:01:54,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 04:01:54,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 04:01:54,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:01:54,478 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:01:54,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:01:54,584 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 04:01:54,584 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538349399] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:01:54,584 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:01:54,584 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 20 [2022-02-10 04:01:54,584 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646800870] [2022-02-10 04:01:54,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:01:54,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 04:01:54,585 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:01:54,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 04:01:54,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2022-02-10 04:01:54,585 INFO L87 Difference]: Start difference. First operand 41812 states and 113076 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:01:56,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:01:56,952 INFO L93 Difference]: Finished difference Result 60713 states and 155592 transitions. [2022-02-10 04:01:56,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-02-10 04:01:56,952 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-10 04:01:56,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:01:57,142 INFO L225 Difference]: With dead ends: 60713 [2022-02-10 04:01:57,142 INFO L226 Difference]: Without dead ends: 60713 [2022-02-10 04:01:57,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6611 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3388, Invalid=13382, Unknown=0, NotChecked=0, Total=16770 [2022-02-10 04:01:57,144 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 698 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 1028 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 698 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 1183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 1028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-10 04:01:57,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [698 Valid, 318 Invalid, 1183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 1028 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-10 04:01:57,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60713 states. [2022-02-10 04:01:58,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60713 to 41812. [2022-02-10 04:01:58,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41812 states, 41811 states have (on average 2.704455765229246) internal successors, (113076), 41811 states have internal predecessors, (113076), 0 states have call successors, (0), 0 states 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 04:01:58,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41812 states to 41812 states and 113076 transitions. [2022-02-10 04:01:58,656 INFO L78 Accepts]: Start accepts. Automaton has 41812 states and 113076 transitions. Word has length 28 [2022-02-10 04:01:58,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:01:58,657 INFO L470 AbstractCegarLoop]: Abstraction has 41812 states and 113076 transitions. [2022-02-10 04:01:58,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:01:58,657 INFO L276 IsEmpty]: Start isEmpty. Operand 41812 states and 113076 transitions. [2022-02-10 04:01:58,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-10 04:01:58,731 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:01:58,731 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 04:01:58,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-02-10 04:01:58,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:01:58,947 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:01:58,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:01:58,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1478153354, now seen corresponding path program 79 times [2022-02-10 04:01:58,948 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:01:58,948 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339384520] [2022-02-10 04:01:58,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:01:58,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:01:58,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:01:58,993 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:01:58,993 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:01:58,993 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339384520] [2022-02-10 04:01:58,993 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339384520] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:01:58,993 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837257679] [2022-02-10 04:01:58,993 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 04:01:58,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:01:58,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:01:58,994 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:01:58,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-02-10 04:01:59,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:01:59,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 04:01:59,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:01:59,126 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:01:59,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:01:59,242 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 04:01:59,242 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837257679] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:01:59,242 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:01:59,242 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 20 [2022-02-10 04:01:59,242 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571996384] [2022-02-10 04:01:59,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:01:59,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 04:01:59,243 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:01:59,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 04:01:59,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-02-10 04:01:59,243 INFO L87 Difference]: Start difference. First operand 41812 states and 113076 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states 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 04:02:01,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:02:01,185 INFO L93 Difference]: Finished difference Result 55325 states and 145109 transitions. [2022-02-10 04:02:01,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-02-10 04:02:01,185 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-10 04:02:01,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:02:01,423 INFO L225 Difference]: With dead ends: 55325 [2022-02-10 04:02:01,423 INFO L226 Difference]: Without dead ends: 55325 [2022-02-10 04:02:01,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3733 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1907, Invalid=7993, Unknown=0, NotChecked=0, Total=9900 [2022-02-10 04:02:01,424 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 473 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 1015 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 1164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 1015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-10 04:02:01,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [473 Valid, 383 Invalid, 1164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 1015 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-10 04:02:01,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55325 states. [2022-02-10 04:02:02,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55325 to 42071. [2022-02-10 04:02:02,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42071 states, 42070 states have (on average 2.705181839790825) internal successors, (113807), 42070 states have internal predecessors, (113807), 0 states have call successors, (0), 0 states 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 04:02:02,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42071 states to 42071 states and 113807 transitions. [2022-02-10 04:02:02,786 INFO L78 Accepts]: Start accepts. Automaton has 42071 states and 113807 transitions. Word has length 28 [2022-02-10 04:02:02,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:02:02,786 INFO L470 AbstractCegarLoop]: Abstraction has 42071 states and 113807 transitions. [2022-02-10 04:02:02,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states 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 04:02:02,787 INFO L276 IsEmpty]: Start isEmpty. Operand 42071 states and 113807 transitions. [2022-02-10 04:02:02,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-10 04:02:02,848 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:02:02,848 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 04:02:02,871 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-02-10 04:02:03,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2022-02-10 04:02:03,049 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:02:03,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:02:03,049 INFO L85 PathProgramCache]: Analyzing trace with hash 353344692, now seen corresponding path program 80 times [2022-02-10 04:02:03,049 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:02:03,049 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642394587] [2022-02-10 04:02:03,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:02:03,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:02:03,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:02:03,093 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:02:03,093 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:02:03,093 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642394587] [2022-02-10 04:02:03,093 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642394587] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:02:03,093 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783120783] [2022-02-10 04:02:03,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 04:02:03,093 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:02:03,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:02:03,094 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:02:03,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-02-10 04:02:03,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 04:02:03,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 04:02:03,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 04:02:03,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:02:03,237 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:02:03,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:02:03,363 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:02:03,363 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783120783] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:02:03,363 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:02:03,363 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 22 [2022-02-10 04:02:03,363 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164526789] [2022-02-10 04:02:03,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:02:03,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 04:02:03,364 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:02:03,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 04:02:03,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2022-02-10 04:02:03,364 INFO L87 Difference]: Start difference. First operand 42071 states and 113807 transitions. Second operand has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:02:06,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:02:06,241 INFO L93 Difference]: Finished difference Result 89862 states and 234424 transitions. [2022-02-10 04:02:06,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-02-10 04:02:06,241 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-10 04:02:06,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:02:06,540 INFO L225 Difference]: With dead ends: 89862 [2022-02-10 04:02:06,541 INFO L226 Difference]: Without dead ends: 89862 [2022-02-10 04:02:06,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9898 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=5028, Invalid=17322, Unknown=0, NotChecked=0, Total=22350 [2022-02-10 04:02:06,542 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 776 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 1090 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 776 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 1267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 1090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-10 04:02:06,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [776 Valid, 316 Invalid, 1267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 1090 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-10 04:02:06,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89862 states. [2022-02-10 04:02:08,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89862 to 53927. [2022-02-10 04:02:08,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53927 states, 53926 states have (on average 2.749490041909283) internal successors, (148269), 53926 states have internal predecessors, (148269), 0 states have call successors, (0), 0 states 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 04:02:08,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53927 states to 53927 states and 148269 transitions. [2022-02-10 04:02:08,538 INFO L78 Accepts]: Start accepts. Automaton has 53927 states and 148269 transitions. Word has length 28 [2022-02-10 04:02:08,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:02:08,538 INFO L470 AbstractCegarLoop]: Abstraction has 53927 states and 148269 transitions. [2022-02-10 04:02:08,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:02:08,538 INFO L276 IsEmpty]: Start isEmpty. Operand 53927 states and 148269 transitions. [2022-02-10 04:02:08,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-10 04:02:08,610 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:02:08,610 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 04:02:08,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-02-10 04:02:08,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:02:08,810 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:02:08,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:02:08,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1496402892, now seen corresponding path program 81 times [2022-02-10 04:02:08,811 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:02:08,811 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837925946] [2022-02-10 04:02:08,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:02:08,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:02:08,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:02:08,841 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:02:08,841 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:02:08,841 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837925946] [2022-02-10 04:02:08,841 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837925946] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:02:08,841 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064234004] [2022-02-10 04:02:08,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 04:02:08,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:02:08,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:02:08,842 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:02:08,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-02-10 04:02:08,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 04:02:08,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 04:02:08,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-10 04:02:08,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:02:08,943 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 04:02:08,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:02:09,036 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:02:09,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064234004] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:02:09,036 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:02:09,036 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 15 [2022-02-10 04:02:09,036 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157773156] [2022-02-10 04:02:09,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:02:09,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-10 04:02:09,036 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:02:09,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-10 04:02:09,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-02-10 04:02:09,037 INFO L87 Difference]: Start difference. First operand 53927 states and 148269 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states 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 04:02:09,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:02:09,678 INFO L93 Difference]: Finished difference Result 62599 states and 165173 transitions. [2022-02-10 04:02:09,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-10 04:02:09,678 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-10 04:02:09,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:02:09,842 INFO L225 Difference]: With dead ends: 62599 [2022-02-10 04:02:09,843 INFO L226 Difference]: Without dead ends: 62597 [2022-02-10 04:02:09,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=203, Invalid=349, Unknown=0, NotChecked=0, Total=552 [2022-02-10 04:02:09,843 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 264 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 04:02:09,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 74 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 04:02:09,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62597 states. [2022-02-10 04:02:11,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62597 to 53965. [2022-02-10 04:02:11,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53965 states, 53964 states have (on average 2.7482210362463864) internal successors, (148305), 53964 states have internal predecessors, (148305), 0 states have call successors, (0), 0 states 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 04:02:11,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53965 states to 53965 states and 148305 transitions. [2022-02-10 04:02:11,422 INFO L78 Accepts]: Start accepts. Automaton has 53965 states and 148305 transitions. Word has length 28 [2022-02-10 04:02:11,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:02:11,422 INFO L470 AbstractCegarLoop]: Abstraction has 53965 states and 148305 transitions. [2022-02-10 04:02:11,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states 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 04:02:11,422 INFO L276 IsEmpty]: Start isEmpty. Operand 53965 states and 148305 transitions. [2022-02-10 04:02:11,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-10 04:02:11,495 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:02:11,495 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 04:02:11,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2022-02-10 04:02:11,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:02:11,696 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:02:11,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:02:11,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1155955964, now seen corresponding path program 82 times [2022-02-10 04:02:11,696 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:02:11,696 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512009944] [2022-02-10 04:02:11,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:02:11,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:02:11,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:02:11,738 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:02:11,739 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:02:11,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512009944] [2022-02-10 04:02:11,739 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512009944] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:02:11,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64883581] [2022-02-10 04:02:11,739 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 04:02:11,739 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:02:11,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:02:11,740 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:02:11,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-02-10 04:02:11,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 04:02:11,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 04:02:11,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 04:02:11,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:02:11,853 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:02:11,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:02:11,957 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:02:11,957 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64883581] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:02:11,957 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:02:11,958 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 20 [2022-02-10 04:02:11,958 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91932654] [2022-02-10 04:02:11,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:02:11,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 04:02:11,958 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:02:11,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 04:02:11,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2022-02-10 04:02:11,958 INFO L87 Difference]: Start difference. First operand 53965 states and 148305 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states 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 04:02:13,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:02:13,923 INFO L93 Difference]: Finished difference Result 89565 states and 232877 transitions. [2022-02-10 04:02:13,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-02-10 04:02:13,923 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-10 04:02:13,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:02:14,213 INFO L225 Difference]: With dead ends: 89565 [2022-02-10 04:02:14,213 INFO L226 Difference]: Without dead ends: 89564 [2022-02-10 04:02:14,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4957 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2836, Invalid=9596, Unknown=0, NotChecked=0, Total=12432 [2022-02-10 04:02:14,214 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 745 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 745 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 1031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-10 04:02:14,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [745 Valid, 243 Invalid, 1031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 836 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-10 04:02:14,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89564 states. [2022-02-10 04:02:15,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89564 to 53983. [2022-02-10 04:02:16,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53983 states, 53982 states have (on average 2.7479159719906634) internal successors, (148338), 53982 states have internal predecessors, (148338), 0 states have call successors, (0), 0 states 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 04:02:16,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53983 states to 53983 states and 148338 transitions. [2022-02-10 04:02:16,199 INFO L78 Accepts]: Start accepts. Automaton has 53983 states and 148338 transitions. Word has length 28 [2022-02-10 04:02:16,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 04:02:16,199 INFO L470 AbstractCegarLoop]: Abstraction has 53983 states and 148338 transitions. [2022-02-10 04:02:16,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states 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 04:02:16,199 INFO L276 IsEmpty]: Start isEmpty. Operand 53983 states and 148338 transitions. [2022-02-10 04:02:16,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-10 04:02:16,273 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 04:02:16,273 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 04:02:16,290 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2022-02-10 04:02:16,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2022-02-10 04:02:16,473 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-10 04:02:16,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 04:02:16,473 INFO L85 PathProgramCache]: Analyzing trace with hash -512478848, now seen corresponding path program 83 times [2022-02-10 04:02:16,473 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 04:02:16,474 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023283774] [2022-02-10 04:02:16,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 04:02:16,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 04:02:16,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 04:02:16,514 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:02:16,515 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 04:02:16,515 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023283774] [2022-02-10 04:02:16,515 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023283774] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 04:02:16,515 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646616643] [2022-02-10 04:02:16,515 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 04:02:16,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 04:02:16,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 04:02:16,516 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 04:02:16,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-02-10 04:02:16,536 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 04:02:16,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 04:02:16,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 04:02:16,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 04:02:16,816 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:02:16,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 04:02:16,917 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 04:02:16,917 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646616643] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 04:02:16,917 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 04:02:16,917 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 18 [2022-02-10 04:02:16,917 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603489897] [2022-02-10 04:02:16,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 04:02:16,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 04:02:16,918 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 04:02:16,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 04:02:16,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2022-02-10 04:02:16,918 INFO L87 Difference]: Start difference. First operand 53983 states and 148338 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 04:02:18,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 04:02:18,518 INFO L93 Difference]: Finished difference Result 85942 states and 226443 transitions. [2022-02-10 04:02:18,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-02-10 04:02:18,518 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-10 04:02:18,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 04:02:18,795 INFO L225 Difference]: With dead ends: 85942 [2022-02-10 04:02:18,795 INFO L226 Difference]: Without dead ends: 85939 [2022-02-10 04:02:18,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2740 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1617, Invalid=5693, Unknown=0, NotChecked=0, Total=7310 [2022-02-10 04:02:18,796 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 484 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-10 04:02:18,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [484 Valid, 236 Invalid, 961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 840 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-10 04:02:18,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85939 states.