/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/three-array-sum.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-4b0ab11 [2022-03-03 19:41:07,722 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-03 19:41:07,723 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-03 19:41:07,765 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-03 19:41:07,805 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-03 19:41:07,806 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-03 19:41:07,806 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-03 19:41:07,807 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-03-03 19:41:07,828 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-03 19:41:07,828 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-03 19:41:07,828 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-03 19:41:07,828 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-03 19:41:07,829 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-03 19:41:07,829 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-03 19:41:07,829 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-03 19:41:07,829 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-03 19:41:07,829 INFO L138 SettingsManager]: * Use SBE=true [2022-03-03 19:41:07,829 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-03 19:41:07,830 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-03 19:41:07,830 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-03 19:41:07,830 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-03 19:41:07,830 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-03 19:41:07,830 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-03 19:41:07,830 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-03 19:41:07,831 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-03 19:41:07,831 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-03 19:41:07,831 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-03 19:41:07,831 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-03 19:41:07,831 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-03 19:41:07,831 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-03 19:41:07,831 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-03 19:41:07,831 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-03 19:41:07,832 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-03 19:41:07,832 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 19:41:07,832 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-03 19:41:07,832 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-03 19:41:07,832 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-03 19:41:07,832 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-03 19:41:07,832 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-03 19:41:07,833 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-03 19:41:07,833 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-03 19:41:07,833 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-03 19:41:08,024 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-03 19:41:08,042 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-03 19:41:08,043 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-03 19:41:08,044 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-03 19:41:08,045 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-03 19:41:08,046 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/three-array-sum.wvr.bpl [2022-03-03 19:41:08,046 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/three-array-sum.wvr.bpl' [2022-03-03 19:41:08,073 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-03 19:41:08,074 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-03 19:41:08,075 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-03 19:41:08,075 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-03 19:41:08,075 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-03 19:41:08,083 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:41:08" (1/1) ... [2022-03-03 19:41:08,088 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:41:08" (1/1) ... [2022-03-03 19:41:08,093 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-03 19:41:08,094 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-03 19:41:08,095 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-03 19:41:08,095 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-03 19:41:08,095 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-03 19:41:08,100 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:41:08" (1/1) ... [2022-03-03 19:41:08,100 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:41:08" (1/1) ... [2022-03-03 19:41:08,101 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:41:08" (1/1) ... [2022-03-03 19:41:08,101 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:41:08" (1/1) ... [2022-03-03 19:41:08,103 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:41:08" (1/1) ... [2022-03-03 19:41:08,105 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:41:08" (1/1) ... [2022-03-03 19:41:08,105 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:41:08" (1/1) ... [2022-03-03 19:41:08,106 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-03 19:41:08,107 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-03 19:41:08,107 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-03 19:41:08,107 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-03 19:41:08,108 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:41:08" (1/1) ... [2022-03-03 19:41:08,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 19:41:08,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:41:08,127 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-03 19:41:08,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-03 19:41:08,173 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-03 19:41:08,173 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-03 19:41:08,173 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-03 19:41:08,173 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-03 19:41:08,173 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-03 19:41:08,174 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-03 19:41:08,174 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-03 19:41:08,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-03 19:41:08,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-03 19:41:08,174 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-03-03 19:41:08,175 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-03-03 19:41:08,175 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-03-03 19:41:08,175 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-03 19:41:08,213 INFO L234 CfgBuilder]: Building ICFG [2022-03-03 19:41:08,213 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-03 19:41:08,288 INFO L275 CfgBuilder]: Performing block encoding [2022-03-03 19:41:08,300 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-03 19:41:08,300 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-03 19:41:08,302 INFO L202 PluginConnector]: Adding new model three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.03 07:41:08 BoogieIcfgContainer [2022-03-03 19:41:08,302 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-03 19:41:08,303 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-03 19:41:08,303 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-03 19:41:08,305 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-03 19:41:08,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:41:08" (1/2) ... [2022-03-03 19:41:08,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f9a51ff and model type three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 07:41:08, skipping insertion in model container [2022-03-03 19:41:08,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.03 07:41:08" (2/2) ... [2022-03-03 19:41:08,307 INFO L111 eAbstractionObserver]: Analyzing ICFG three-array-sum.wvr.bpl [2022-03-03 19:41:08,310 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-03 19:41:08,310 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-03 19:41:08,310 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-03 19:41:08,310 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-03 19:41:08,335 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-03-03 19:41:08,368 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-03 19:41:08,372 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-03 19:41:08,373 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-03-03 19:41:08,379 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 35 places, 29 transitions, 82 flow [2022-03-03 19:41:08,415 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 131 states, 130 states have (on average 3.023076923076923) internal successors, (393), 130 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:08,417 INFO L276 IsEmpty]: Start isEmpty. Operand has 131 states, 130 states have (on average 3.023076923076923) internal successors, (393), 130 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:08,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-03 19:41:08,424 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:41:08,424 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:41:08,425 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:41:08,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:41:08,428 INFO L85 PathProgramCache]: Analyzing trace with hash 510990075, now seen corresponding path program 1 times [2022-03-03 19:41:08,435 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:41:08,435 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644045461] [2022-03-03 19:41:08,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:41:08,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:41:08,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:41:08,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:08,589 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:41:08,590 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644045461] [2022-03-03 19:41:08,590 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644045461] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:41:08,590 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:41:08,590 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-03 19:41:08,591 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110763016] [2022-03-03 19:41:08,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:41:08,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-03 19:41:08,606 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:41:08,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-03 19:41:08,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 19:41:08,625 INFO L87 Difference]: Start difference. First operand has 131 states, 130 states have (on average 3.023076923076923) internal successors, (393), 130 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:08,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:41:08,665 INFO L93 Difference]: Finished difference Result 257 states and 781 transitions. [2022-03-03 19:41:08,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-03 19:41:08,667 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-03 19:41:08,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:41:08,675 INFO L225 Difference]: With dead ends: 257 [2022-03-03 19:41:08,675 INFO L226 Difference]: Without dead ends: 230 [2022-03-03 19:41:08,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 19:41:08,707 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 6 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:41:08,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 27 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:41:08,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-03-03 19:41:08,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 188. [2022-03-03 19:41:08,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 3.0802139037433154) internal successors, (576), 187 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:08,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 576 transitions. [2022-03-03 19:41:08,747 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 576 transitions. Word has length 16 [2022-03-03 19:41:08,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:41:08,748 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 576 transitions. [2022-03-03 19:41:08,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:08,749 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 576 transitions. [2022-03-03 19:41:08,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-03 19:41:08,750 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:41:08,750 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:41:08,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-03 19:41:08,751 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:41:08,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:41:08,752 INFO L85 PathProgramCache]: Analyzing trace with hash 761707259, now seen corresponding path program 1 times [2022-03-03 19:41:08,752 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:41:08,752 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687886296] [2022-03-03 19:41:08,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:41:08,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:41:08,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:41:08,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:08,825 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:41:08,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687886296] [2022-03-03 19:41:08,826 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687886296] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:41:08,826 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:41:08,826 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-03 19:41:08,826 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065654588] [2022-03-03 19:41:08,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:41:08,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 19:41:08,827 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:41:08,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 19:41:08,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-03 19:41:08,828 INFO L87 Difference]: Start difference. First operand 188 states and 576 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:08,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:41:08,878 INFO L93 Difference]: Finished difference Result 355 states and 1087 transitions. [2022-03-03 19:41:08,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-03 19:41:08,878 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-03 19:41:08,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:41:08,881 INFO L225 Difference]: With dead ends: 355 [2022-03-03 19:41:08,881 INFO L226 Difference]: Without dead ends: 355 [2022-03-03 19:41:08,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-03 19:41:08,882 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 28 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:41:08,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 36 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:41:08,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-03-03 19:41:08,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 213. [2022-03-03 19:41:08,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 3.1792452830188678) internal successors, (674), 212 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:08,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 674 transitions. [2022-03-03 19:41:08,897 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 674 transitions. Word has length 18 [2022-03-03 19:41:08,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:41:08,898 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 674 transitions. [2022-03-03 19:41:08,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:08,898 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 674 transitions. [2022-03-03 19:41:08,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-03 19:41:08,899 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:41:08,899 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:41:08,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-03 19:41:08,900 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:41:08,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:41:08,900 INFO L85 PathProgramCache]: Analyzing trace with hash 988928639, now seen corresponding path program 2 times [2022-03-03 19:41:08,900 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:41:08,901 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253835841] [2022-03-03 19:41:08,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:41:08,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:41:08,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:41:08,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:08,946 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:41:08,946 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253835841] [2022-03-03 19:41:08,946 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253835841] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:41:08,946 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:41:08,946 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-03 19:41:08,946 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265096704] [2022-03-03 19:41:08,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:41:08,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 19:41:08,947 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:41:08,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 19:41:08,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:41:08,947 INFO L87 Difference]: Start difference. First operand 213 states and 674 transitions. 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) [2022-03-03 19:41:09,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:41:09,023 INFO L93 Difference]: Finished difference Result 450 states and 1348 transitions. [2022-03-03 19:41:09,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 19:41:09,024 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 [2022-03-03 19:41:09,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:41:09,029 INFO L225 Difference]: With dead ends: 450 [2022-03-03 19:41:09,030 INFO L226 Difference]: Without dead ends: 450 [2022-03-03 19:41:09,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:41:09,034 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 48 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:41:09,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 47 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:41:09,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2022-03-03 19:41:09,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 235. [2022-03-03 19:41:09,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 3.1837606837606836) internal successors, (745), 234 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:09,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 745 transitions. [2022-03-03 19:41:09,056 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 745 transitions. Word has length 18 [2022-03-03 19:41:09,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:41:09,057 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 745 transitions. [2022-03-03 19:41:09,057 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) [2022-03-03 19:41:09,057 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 745 transitions. [2022-03-03 19:41:09,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-03 19:41:09,058 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:41:09,058 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:41:09,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-03 19:41:09,058 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:41:09,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:41:09,060 INFO L85 PathProgramCache]: Analyzing trace with hash 901635393, now seen corresponding path program 3 times [2022-03-03 19:41:09,061 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:41:09,061 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151196585] [2022-03-03 19:41:09,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:41:09,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:41:09,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:41:09,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:09,115 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:41:09,115 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151196585] [2022-03-03 19:41:09,115 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151196585] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:41:09,115 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:41:09,115 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-03 19:41:09,116 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724396987] [2022-03-03 19:41:09,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:41:09,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 19:41:09,116 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:41:09,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 19:41:09,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-03 19:41:09,116 INFO L87 Difference]: Start difference. First operand 235 states and 745 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:09,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:41:09,162 INFO L93 Difference]: Finished difference Result 349 states and 1037 transitions. [2022-03-03 19:41:09,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-03 19:41:09,162 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-03 19:41:09,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:41:09,164 INFO L225 Difference]: With dead ends: 349 [2022-03-03 19:41:09,164 INFO L226 Difference]: Without dead ends: 345 [2022-03-03 19:41:09,164 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 [2022-03-03 19:41:09,171 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 32 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:41:09,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 30 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:41:09,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-03-03 19:41:09,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 274. [2022-03-03 19:41:09,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 3.128205128205128) internal successors, (854), 273 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:09,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 854 transitions. [2022-03-03 19:41:09,188 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 854 transitions. Word has length 18 [2022-03-03 19:41:09,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:41:09,188 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 854 transitions. [2022-03-03 19:41:09,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:09,188 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 854 transitions. [2022-03-03 19:41:09,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-03 19:41:09,189 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:41:09,189 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:41:09,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-03 19:41:09,190 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:41:09,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:41:09,190 INFO L85 PathProgramCache]: Analyzing trace with hash 938496605, now seen corresponding path program 1 times [2022-03-03 19:41:09,190 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:41:09,191 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092035792] [2022-03-03 19:41:09,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:41:09,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:41:09,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:41:09,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:09,229 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:41:09,229 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092035792] [2022-03-03 19:41:09,229 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092035792] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:41:09,229 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:41:09,229 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-03 19:41:09,230 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368299346] [2022-03-03 19:41:09,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:41:09,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 19:41:09,230 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:41:09,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 19:41:09,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-03 19:41:09,231 INFO L87 Difference]: Start difference. First operand 274 states and 854 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:09,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:41:09,280 INFO L93 Difference]: Finished difference Result 345 states and 1038 transitions. [2022-03-03 19:41:09,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 19:41:09,280 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-03 19:41:09,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:41:09,282 INFO L225 Difference]: With dead ends: 345 [2022-03-03 19:41:09,283 INFO L226 Difference]: Without dead ends: 307 [2022-03-03 19:41:09,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:41:09,284 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 36 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:41:09,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 21 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:41:09,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-03-03 19:41:09,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 276. [2022-03-03 19:41:09,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 3.036363636363636) internal successors, (835), 275 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:09,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 835 transitions. [2022-03-03 19:41:09,306 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 835 transitions. Word has length 19 [2022-03-03 19:41:09,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:41:09,306 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 835 transitions. [2022-03-03 19:41:09,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:09,307 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 835 transitions. [2022-03-03 19:41:09,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-03 19:41:09,308 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:41:09,308 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:41:09,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-03 19:41:09,308 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:41:09,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:41:09,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1599468323, now seen corresponding path program 2 times [2022-03-03 19:41:09,309 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:41:09,309 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928519411] [2022-03-03 19:41:09,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:41:09,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:41:09,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:41:09,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:09,370 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:41:09,370 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928519411] [2022-03-03 19:41:09,370 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928519411] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:41:09,370 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:41:09,370 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-03 19:41:09,370 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221595080] [2022-03-03 19:41:09,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:41:09,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-03 19:41:09,371 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:41:09,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-03 19:41:09,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 19:41:09,371 INFO L87 Difference]: Start difference. First operand 276 states and 835 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:09,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:41:09,391 INFO L93 Difference]: Finished difference Result 257 states and 747 transitions. [2022-03-03 19:41:09,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-03 19:41:09,391 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-03 19:41:09,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:41:09,392 INFO L225 Difference]: With dead ends: 257 [2022-03-03 19:41:09,392 INFO L226 Difference]: Without dead ends: 241 [2022-03-03 19:41:09,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 19:41:09,393 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:41:09,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 21 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:41:09,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-03-03 19:41:09,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 231. [2022-03-03 19:41:09,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 3.017391304347826) internal successors, (694), 230 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:09,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 694 transitions. [2022-03-03 19:41:09,401 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 694 transitions. Word has length 19 [2022-03-03 19:41:09,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:41:09,401 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 694 transitions. [2022-03-03 19:41:09,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:09,402 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 694 transitions. [2022-03-03 19:41:09,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 19:41:09,402 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:41:09,402 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] [2022-03-03 19:41:09,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-03 19:41:09,403 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:41:09,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:41:09,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1736700641, now seen corresponding path program 1 times [2022-03-03 19:41:09,403 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:41:09,403 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375174213] [2022-03-03 19:41:09,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:41:09,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:41:09,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:41:09,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:41:09,440 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:41:09,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375174213] [2022-03-03 19:41:09,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375174213] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:41:09,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261380292] [2022-03-03 19:41:09,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:41:09,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:09,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:41:09,445 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:41:09,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-03 19:41:09,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:41:09,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-03 19:41:09,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:41:09,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:41:09,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:41:09,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:41:09,645 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261380292] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:41:09,645 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:41:09,645 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2022-03-03 19:41:09,645 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728181907] [2022-03-03 19:41:09,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:41:09,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-03 19:41:09,646 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:41:09,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-03 19:41:09,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-03 19:41:09,646 INFO L87 Difference]: Start difference. First operand 231 states and 694 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:09,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:41:09,717 INFO L93 Difference]: Finished difference Result 295 states and 908 transitions. [2022-03-03 19:41:09,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-03 19:41:09,718 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 19:41:09,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:41:09,719 INFO L225 Difference]: With dead ends: 295 [2022-03-03 19:41:09,719 INFO L226 Difference]: Without dead ends: 295 [2022-03-03 19:41:09,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-03 19:41:09,720 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 51 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:41:09,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 31 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:41:09,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-03-03 19:41:09,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 203. [2022-03-03 19:41:09,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 3.0247524752475248) internal successors, (611), 202 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:09,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 611 transitions. [2022-03-03 19:41:09,725 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 611 transitions. Word has length 20 [2022-03-03 19:41:09,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:41:09,725 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 611 transitions. [2022-03-03 19:41:09,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:09,726 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 611 transitions. [2022-03-03 19:41:09,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:41:09,726 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:41:09,726 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] [2022-03-03 19:41:09,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-03 19:41:09,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:09,927 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:41:09,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:41:09,928 INFO L85 PathProgramCache]: Analyzing trace with hash 345358593, now seen corresponding path program 1 times [2022-03-03 19:41:09,928 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:41:09,928 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953830255] [2022-03-03 19:41:09,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:41:09,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:41:09,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:41:09,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:41:09,967 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:41:09,967 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953830255] [2022-03-03 19:41:09,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953830255] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:41:09,967 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982778223] [2022-03-03 19:41:09,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:41:09,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:09,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:41:09,968 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:41:09,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-03 19:41:09,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:41:09,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-03 19:41:09,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:41:10,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:41:10,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:41:10,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:41:10,078 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982778223] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:41:10,079 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:41:10,079 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 6 [2022-03-03 19:41:10,079 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548425509] [2022-03-03 19:41:10,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:41:10,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-03 19:41:10,079 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:41:10,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-03 19:41:10,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-03 19:41:10,080 INFO L87 Difference]: Start difference. First operand 203 states and 611 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:10,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:41:10,146 INFO L93 Difference]: Finished difference Result 288 states and 873 transitions. [2022-03-03 19:41:10,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-03 19:41:10,146 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 19:41:10,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:41:10,148 INFO L225 Difference]: With dead ends: 288 [2022-03-03 19:41:10,148 INFO L226 Difference]: Without dead ends: 288 [2022-03-03 19:41:10,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:41:10,149 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 57 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:41:10,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 34 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:41:10,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-03-03 19:41:10,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 215. [2022-03-03 19:41:10,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 3.0233644859813085) internal successors, (647), 214 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:10,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 647 transitions. [2022-03-03 19:41:10,156 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 647 transitions. Word has length 21 [2022-03-03 19:41:10,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:41:10,156 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 647 transitions. [2022-03-03 19:41:10,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:10,156 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 647 transitions. [2022-03-03 19:41:10,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:41:10,157 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:41:10,157 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] [2022-03-03 19:41:10,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-03 19:41:10,373 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,SelfDestructingSolverStorable7 [2022-03-03 19:41:10,373 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:41:10,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:41:10,374 INFO L85 PathProgramCache]: Analyzing trace with hash -41937549, now seen corresponding path program 1 times [2022-03-03 19:41:10,374 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:41:10,374 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833426772] [2022-03-03 19:41:10,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:41:10,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:41:10,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:41:10,475 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:10,475 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:41:10,475 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833426772] [2022-03-03 19:41:10,475 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833426772] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:41:10,475 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371817008] [2022-03-03 19:41:10,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:41:10,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:10,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:41:10,492 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:41:10,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-03 19:41:10,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:41:10,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-03 19:41:10,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:41:10,749 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 18 treesize of output 14 [2022-03-03 19:41:10,752 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 20 treesize of output 16 [2022-03-03 19:41:10,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:41:10,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-03 19:41:10,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:10,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:41:10,887 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 31 treesize of output 29 [2022-03-03 19:41:10,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:10,948 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:41:10,948 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 18 treesize of output 23 [2022-03-03 19:41:10,954 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:41:10,954 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 14 treesize of output 19 [2022-03-03 19:41:10,981 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 18 treesize of output 12 [2022-03-03 19:41:10,984 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 12 treesize of output 5 [2022-03-03 19:41:11,025 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:11,026 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371817008] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:41:11,026 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:41:11,026 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-03-03 19:41:11,026 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453304187] [2022-03-03 19:41:11,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:41:11,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 19:41:11,026 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:41:11,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 19:41:11,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:41:11,027 INFO L87 Difference]: Start difference. First operand 215 states and 647 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:11,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:41:11,133 INFO L93 Difference]: Finished difference Result 476 states and 1460 transitions. [2022-03-03 19:41:11,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-03 19:41:11,133 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 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 23 [2022-03-03 19:41:11,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:41:11,135 INFO L225 Difference]: With dead ends: 476 [2022-03-03 19:41:11,135 INFO L226 Difference]: Without dead ends: 449 [2022-03-03 19:41:11,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:41:11,136 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 35 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:41:11,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 80 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:41:11,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2022-03-03 19:41:11,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 314. [2022-03-03 19:41:11,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 3.073482428115016) internal successors, (962), 313 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:11,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 962 transitions. [2022-03-03 19:41:11,143 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 962 transitions. Word has length 23 [2022-03-03 19:41:11,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:41:11,144 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 962 transitions. [2022-03-03 19:41:11,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:11,144 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 962 transitions. [2022-03-03 19:41:11,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:41:11,145 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:41:11,145 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] [2022-03-03 19:41:11,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-03 19:41:11,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:11,361 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:41:11,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:41:11,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1347256959, now seen corresponding path program 2 times [2022-03-03 19:41:11,361 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:41:11,361 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005275313] [2022-03-03 19:41:11,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:41:11,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:41:11,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:41:11,500 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:11,500 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:41:11,500 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005275313] [2022-03-03 19:41:11,500 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005275313] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:41:11,500 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390314540] [2022-03-03 19:41:11,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:41:11,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:11,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:41:11,502 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:41:11,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-03 19:41:11,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:41:11,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:41:11,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-03 19:41:11,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:41:11,651 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-03 19:41:11,739 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 19 treesize of output 15 [2022-03-03 19:41:11,780 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 24 treesize of output 18 [2022-03-03 19:41:11,783 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 20 treesize of output 14 [2022-03-03 19:41:11,818 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:11,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:41:11,908 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:41:11,908 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 25 treesize of output 30 [2022-03-03 19:41:11,916 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:41:11,917 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 26 [2022-03-03 19:41:11,920 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 33 treesize of output 31 [2022-03-03 19:41:11,957 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 24 treesize of output 20 [2022-03-03 19:41:11,959 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 20 treesize of output 16 [2022-03-03 19:41:11,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:12,046 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:12,046 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390314540] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:41:12,046 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:41:12,046 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-03-03 19:41:12,047 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497209193] [2022-03-03 19:41:12,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:41:12,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 19:41:12,047 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:41:12,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 19:41:12,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-03 19:41:12,048 INFO L87 Difference]: Start difference. First operand 314 states and 962 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:12,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:41:12,139 INFO L93 Difference]: Finished difference Result 517 states and 1600 transitions. [2022-03-03 19:41:12,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-03 19:41:12,139 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 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 23 [2022-03-03 19:41:12,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:41:12,141 INFO L225 Difference]: With dead ends: 517 [2022-03-03 19:41:12,141 INFO L226 Difference]: Without dead ends: 490 [2022-03-03 19:41:12,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-03 19:41:12,142 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 57 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:41:12,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 73 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:41:12,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2022-03-03 19:41:12,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 366. [2022-03-03 19:41:12,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 3.084931506849315) internal successors, (1126), 365 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:12,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1126 transitions. [2022-03-03 19:41:12,150 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1126 transitions. Word has length 23 [2022-03-03 19:41:12,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:41:12,150 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 1126 transitions. [2022-03-03 19:41:12,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:12,151 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1126 transitions. [2022-03-03 19:41:12,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:41:12,151 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:41:12,151 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] [2022-03-03 19:41:12,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-03 19:41:12,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:12,367 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:41:12,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:41:12,367 INFO L85 PathProgramCache]: Analyzing trace with hash 228461667, now seen corresponding path program 3 times [2022-03-03 19:41:12,367 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:41:12,367 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177462481] [2022-03-03 19:41:12,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:41:12,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:41:12,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:41:12,475 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:12,475 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:41:12,475 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177462481] [2022-03-03 19:41:12,475 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177462481] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:41:12,476 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328961547] [2022-03-03 19:41:12,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:41:12,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:12,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:41:12,500 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:41:12,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-03 19:41:12,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 19:41:12,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:41:12,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-03 19:41:12,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:41:12,631 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-03 19:41:12,712 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 21 treesize of output 17 [2022-03-03 19:41:12,714 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 [2022-03-03 19:41:12,728 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 19 treesize of output 15 [2022-03-03 19:41:12,768 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:12,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:41:12,840 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:41:12,841 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 24 treesize of output 29 [2022-03-03 19:41:12,846 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:41:12,846 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 20 treesize of output 25 [2022-03-03 19:41:12,849 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 31 treesize of output 29 [2022-03-03 19:41:12,894 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 24 treesize of output 20 [2022-03-03 19:41:12,897 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 20 treesize of output 16 [2022-03-03 19:41:12,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:12,969 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:12,969 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328961547] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:41:12,970 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:41:12,970 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-03-03 19:41:12,971 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818635605] [2022-03-03 19:41:12,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:41:12,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 19:41:12,971 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:41:12,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 19:41:12,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-03 19:41:12,972 INFO L87 Difference]: Start difference. First operand 366 states and 1126 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:13,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:41:13,109 INFO L93 Difference]: Finished difference Result 572 states and 1775 transitions. [2022-03-03 19:41:13,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-03 19:41:13,109 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 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 23 [2022-03-03 19:41:13,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:41:13,111 INFO L225 Difference]: With dead ends: 572 [2022-03-03 19:41:13,111 INFO L226 Difference]: Without dead ends: 545 [2022-03-03 19:41:13,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-03 19:41:13,112 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 42 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:41:13,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 97 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:41:13,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2022-03-03 19:41:13,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 366. [2022-03-03 19:41:13,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 3.084931506849315) internal successors, (1126), 365 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:13,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1126 transitions. [2022-03-03 19:41:13,121 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1126 transitions. Word has length 23 [2022-03-03 19:41:13,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:41:13,121 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 1126 transitions. [2022-03-03 19:41:13,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:13,121 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1126 transitions. [2022-03-03 19:41:13,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 19:41:13,122 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:41:13,122 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] [2022-03-03 19:41:13,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-03 19:41:13,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-03 19:41:13,336 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:41:13,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:41:13,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1894937297, now seen corresponding path program 4 times [2022-03-03 19:41:13,336 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:41:13,336 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213553229] [2022-03-03 19:41:13,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:41:13,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:41:13,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:41:13,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:13,378 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:41:13,378 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213553229] [2022-03-03 19:41:13,379 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213553229] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:41:13,379 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448719252] [2022-03-03 19:41:13,379 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:41:13,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:13,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:41:13,380 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:41:13,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-03 19:41:13,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:41:13,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:41:13,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 19:41:13,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:41:13,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:13,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:41:13,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:13,514 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448719252] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:41:13,514 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:41:13,515 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-03-03 19:41:13,515 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777658130] [2022-03-03 19:41:13,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:41:13,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-03 19:41:13,516 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:41:13,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-03 19:41:13,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-03-03 19:41:13,517 INFO L87 Difference]: Start difference. First operand 366 states and 1126 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:13,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:41:13,625 INFO L93 Difference]: Finished difference Result 886 states and 2662 transitions. [2022-03-03 19:41:13,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-03 19:41:13,625 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 19:41:13,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:41:13,629 INFO L225 Difference]: With dead ends: 886 [2022-03-03 19:41:13,629 INFO L226 Difference]: Without dead ends: 886 [2022-03-03 19:41:13,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-03-03 19:41:13,630 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 93 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:41:13,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 117 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:41:13,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2022-03-03 19:41:13,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 517. [2022-03-03 19:41:13,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 3.203488372093023) internal successors, (1653), 516 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:13,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 1653 transitions. [2022-03-03 19:41:13,654 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 1653 transitions. Word has length 25 [2022-03-03 19:41:13,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:41:13,654 INFO L470 AbstractCegarLoop]: Abstraction has 517 states and 1653 transitions. [2022-03-03 19:41:13,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:13,655 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 1653 transitions. [2022-03-03 19:41:13,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 19:41:13,656 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:41:13,656 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, 1] [2022-03-03 19:41:13,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-03 19:41:13,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:13,874 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:41:13,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:41:13,874 INFO L85 PathProgramCache]: Analyzing trace with hash -595223613, now seen corresponding path program 5 times [2022-03-03 19:41:13,874 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:41:13,874 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999329068] [2022-03-03 19:41:13,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:41:13,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:41:13,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:41:13,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:13,922 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:41:13,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999329068] [2022-03-03 19:41:13,922 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999329068] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:41:13,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406699972] [2022-03-03 19:41:13,922 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:41:13,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:13,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:41:13,924 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:41:13,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-03 19:41:13,948 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:41:13,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:41:13,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 19:41:13,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:41:13,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:41:13,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:41:14,019 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:41:14,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406699972] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:41:14,019 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:41:14,019 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-03-03 19:41:14,020 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055591408] [2022-03-03 19:41:14,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:41:14,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 19:41:14,020 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:41:14,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 19:41:14,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-03-03 19:41:14,021 INFO L87 Difference]: Start difference. First operand 517 states and 1653 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:14,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:41:14,645 INFO L93 Difference]: Finished difference Result 1033 states and 3239 transitions. [2022-03-03 19:41:14,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-03 19:41:14,645 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 19:41:14,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:41:14,649 INFO L225 Difference]: With dead ends: 1033 [2022-03-03 19:41:14,649 INFO L226 Difference]: Without dead ends: 1033 [2022-03-03 19:41:14,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=398, Invalid=1324, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:41:14,650 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 332 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:41:14,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 85 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:41:14,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2022-03-03 19:41:14,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 646. [2022-03-03 19:41:14,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 645 states have (on average 3.2496124031007754) internal successors, (2096), 645 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:14,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 2096 transitions. [2022-03-03 19:41:14,665 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 2096 transitions. Word has length 25 [2022-03-03 19:41:14,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:41:14,667 INFO L470 AbstractCegarLoop]: Abstraction has 646 states and 2096 transitions. [2022-03-03 19:41:14,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:14,667 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 2096 transitions. [2022-03-03 19:41:14,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 19:41:14,669 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:41:14,669 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] [2022-03-03 19:41:14,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-03 19:41:14,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:14,904 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:41:14,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:41:14,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1959818837, now seen corresponding path program 6 times [2022-03-03 19:41:14,905 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:41:14,905 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748263321] [2022-03-03 19:41:14,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:41:14,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:41:14,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:41:14,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:14,946 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:41:14,946 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748263321] [2022-03-03 19:41:14,946 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748263321] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:41:14,946 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119803146] [2022-03-03 19:41:14,947 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:41:14,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:14,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:41:14,948 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:41:14,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-03 19:41:15,007 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:41:15,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:41:15,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 19:41:15,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:41:15,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:41:15,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:41:15,109 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:41:15,109 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119803146] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:41:15,109 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:41:15,109 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-03-03 19:41:15,110 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810253061] [2022-03-03 19:41:15,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:41:15,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 19:41:15,110 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:41:15,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 19:41:15,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-03 19:41:15,111 INFO L87 Difference]: Start difference. First operand 646 states and 2096 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 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) [2022-03-03 19:41:15,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:41:15,499 INFO L93 Difference]: Finished difference Result 2177 states and 6995 transitions. [2022-03-03 19:41:15,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-03 19:41:15,500 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 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 25 [2022-03-03 19:41:15,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:41:15,539 INFO L225 Difference]: With dead ends: 2177 [2022-03-03 19:41:15,539 INFO L226 Difference]: Without dead ends: 2151 [2022-03-03 19:41:15,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=251, Invalid=741, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:41:15,540 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 240 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:41:15,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 73 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:41:15,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2151 states. [2022-03-03 19:41:15,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2151 to 1034. [2022-03-03 19:41:15,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 1033 states have (on average 3.478218780251694) internal successors, (3593), 1033 states have internal predecessors, (3593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:15,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 3593 transitions. [2022-03-03 19:41:15,569 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 3593 transitions. Word has length 25 [2022-03-03 19:41:15,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:41:15,569 INFO L470 AbstractCegarLoop]: Abstraction has 1034 states and 3593 transitions. [2022-03-03 19:41:15,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 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) [2022-03-03 19:41:15,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 3593 transitions. [2022-03-03 19:41:15,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 19:41:15,571 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:41:15,571 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] [2022-03-03 19:41:15,601 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-03-03 19:41:15,802 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,SelfDestructingSolverStorable13 [2022-03-03 19:41:15,802 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:41:15,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:41:15,803 INFO L85 PathProgramCache]: Analyzing trace with hash -131125633, now seen corresponding path program 7 times [2022-03-03 19:41:15,803 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:41:15,803 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845998131] [2022-03-03 19:41:15,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:41:15,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:41:15,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:41:15,832 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:15,832 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:41:15,833 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845998131] [2022-03-03 19:41:15,833 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845998131] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:41:15,833 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220704730] [2022-03-03 19:41:15,833 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:41:15,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:15,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:41:15,834 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:41:15,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-03 19:41:15,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:41:15,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 19:41:15,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:41:15,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:15,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:41:15,937 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:15,937 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220704730] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:41:15,937 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:41:15,937 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-03-03 19:41:15,939 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77073915] [2022-03-03 19:41:15,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:41:15,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-03 19:41:15,940 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:41:15,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-03 19:41:15,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-03 19:41:15,940 INFO L87 Difference]: Start difference. First operand 1034 states and 3593 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:16,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:41:16,022 INFO L93 Difference]: Finished difference Result 1476 states and 4927 transitions. [2022-03-03 19:41:16,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-03 19:41:16,022 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 19:41:16,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:41:16,028 INFO L225 Difference]: With dead ends: 1476 [2022-03-03 19:41:16,028 INFO L226 Difference]: Without dead ends: 1470 [2022-03-03 19:41:16,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-03-03 19:41:16,030 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 60 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:41:16,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 92 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:41:16,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2022-03-03 19:41:16,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 1051. [2022-03-03 19:41:16,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1051 states, 1050 states have (on average 3.4647619047619047) internal successors, (3638), 1050 states have internal predecessors, (3638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:16,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 3638 transitions. [2022-03-03 19:41:16,052 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 3638 transitions. Word has length 25 [2022-03-03 19:41:16,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:41:16,053 INFO L470 AbstractCegarLoop]: Abstraction has 1051 states and 3638 transitions. [2022-03-03 19:41:16,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:16,053 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 3638 transitions. [2022-03-03 19:41:16,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 19:41:16,056 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:41:16,056 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] [2022-03-03 19:41:16,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-03 19:41:16,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-03 19:41:16,272 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:41:16,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:41:16,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1794697629, now seen corresponding path program 8 times [2022-03-03 19:41:16,272 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:41:16,272 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147325144] [2022-03-03 19:41:16,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:41:16,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:41:16,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:41:16,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:16,300 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:41:16,300 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147325144] [2022-03-03 19:41:16,300 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147325144] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:41:16,300 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820272251] [2022-03-03 19:41:16,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:41:16,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:16,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:41:16,314 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:41:16,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-03 19:41:16,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:41:16,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:41:16,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 19:41:16,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:41:16,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:16,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:41:16,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:16,421 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820272251] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:41:16,421 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:41:16,421 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-03-03 19:41:16,421 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103971992] [2022-03-03 19:41:16,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:41:16,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-03 19:41:16,422 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:41:16,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-03 19:41:16,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-03 19:41:16,422 INFO L87 Difference]: Start difference. First operand 1051 states and 3638 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:16,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:41:16,511 INFO L93 Difference]: Finished difference Result 1980 states and 6727 transitions. [2022-03-03 19:41:16,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-03 19:41:16,511 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 19:41:16,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:41:16,519 INFO L225 Difference]: With dead ends: 1980 [2022-03-03 19:41:16,519 INFO L226 Difference]: Without dead ends: 1968 [2022-03-03 19:41:16,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-03 19:41:16,520 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 95 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:41:16,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 84 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:41:16,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1968 states. [2022-03-03 19:41:16,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1968 to 1297. [2022-03-03 19:41:16,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1297 states, 1296 states have (on average 3.580246913580247) internal successors, (4640), 1296 states have internal predecessors, (4640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:16,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 4640 transitions. [2022-03-03 19:41:16,548 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 4640 transitions. Word has length 25 [2022-03-03 19:41:16,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:41:16,548 INFO L470 AbstractCegarLoop]: Abstraction has 1297 states and 4640 transitions. [2022-03-03 19:41:16,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:16,549 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 4640 transitions. [2022-03-03 19:41:16,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 19:41:16,551 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:41:16,551 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] [2022-03-03 19:41:16,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-03 19:41:16,766 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,SelfDestructingSolverStorable15 [2022-03-03 19:41:16,766 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:41:16,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:41:16,766 INFO L85 PathProgramCache]: Analyzing trace with hash -675454435, now seen corresponding path program 9 times [2022-03-03 19:41:16,766 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:41:16,767 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236112659] [2022-03-03 19:41:16,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:41:16,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:41:16,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:41:16,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:16,813 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:41:16,814 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236112659] [2022-03-03 19:41:16,814 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236112659] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:41:16,814 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861298391] [2022-03-03 19:41:16,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:41:16,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:16,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:41:16,815 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:41:16,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:41:16,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:41:16,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 19:41:16,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:41:16,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-03 19:41:16,909 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:16,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:41:16,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:16,943 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861298391] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:41:16,943 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:41:16,943 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-03-03 19:41:16,943 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251409382] [2022-03-03 19:41:16,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:41:16,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-03 19:41:16,944 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:41:16,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-03 19:41:16,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-03 19:41:16,944 INFO L87 Difference]: Start difference. First operand 1297 states and 4640 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:17,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:41:17,039 INFO L93 Difference]: Finished difference Result 2951 states and 10415 transitions. [2022-03-03 19:41:17,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-03 19:41:17,039 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 19:41:17,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:41:17,064 INFO L225 Difference]: With dead ends: 2951 [2022-03-03 19:41:17,065 INFO L226 Difference]: Without dead ends: 2945 [2022-03-03 19:41:17,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-03 19:41:17,065 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 159 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:41:17,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 41 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:41:17,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2945 states. [2022-03-03 19:41:17,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2945 to 2000. [2022-03-03 19:41:17,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2000 states, 1999 states have (on average 3.773886943471736) internal successors, (7544), 1999 states have internal predecessors, (7544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:17,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2000 states to 2000 states and 7544 transitions. [2022-03-03 19:41:17,133 INFO L78 Accepts]: Start accepts. Automaton has 2000 states and 7544 transitions. Word has length 25 [2022-03-03 19:41:17,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:41:17,133 INFO L470 AbstractCegarLoop]: Abstraction has 2000 states and 7544 transitions. [2022-03-03 19:41:17,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:17,133 INFO L276 IsEmpty]: Start isEmpty. Operand 2000 states and 7544 transitions. [2022-03-03 19:41:17,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 19:41:17,137 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:41:17,137 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] [2022-03-03 19:41:17,153 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-03-03 19:41:17,352 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,SelfDestructingSolverStorable16 [2022-03-03 19:41:17,353 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:41:17,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:41:17,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1549423517, now seen corresponding path program 10 times [2022-03-03 19:41:17,353 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:41:17,353 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874540008] [2022-03-03 19:41:17,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:41:17,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:41:17,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:41:17,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:17,374 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:41:17,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874540008] [2022-03-03 19:41:17,374 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874540008] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:41:17,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962529635] [2022-03-03 19:41:17,375 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:41:17,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:17,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:41:17,376 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:41:17,412 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:41:17,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:41:17,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 19:41:17,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:41:17,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-03 19:41:17,442 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:41:17,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:41:17,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:41:17,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962529635] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:41:17,471 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:41:17,471 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-03-03 19:41:17,471 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610783028] [2022-03-03 19:41:17,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:41:17,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-03 19:41:17,472 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:41:17,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-03 19:41:17,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-03 19:41:17,472 INFO L87 Difference]: Start difference. First operand 2000 states and 7544 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:17,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:41:17,563 INFO L93 Difference]: Finished difference Result 2777 states and 9915 transitions. [2022-03-03 19:41:17,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-03 19:41:17,563 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 19:41:17,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:41:17,570 INFO L225 Difference]: With dead ends: 2777 [2022-03-03 19:41:17,571 INFO L226 Difference]: Without dead ends: 2759 [2022-03-03 19:41:17,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:41:17,571 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 92 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:41:17,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 67 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:41:17,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2759 states. [2022-03-03 19:41:17,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2759 to 1995. [2022-03-03 19:41:17,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1995 states, 1994 states have (on average 3.7703109327983952) internal successors, (7518), 1994 states have internal predecessors, (7518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:17,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1995 states to 1995 states and 7518 transitions. [2022-03-03 19:41:17,612 INFO L78 Accepts]: Start accepts. Automaton has 1995 states and 7518 transitions. Word has length 25 [2022-03-03 19:41:17,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:41:17,612 INFO L470 AbstractCegarLoop]: Abstraction has 1995 states and 7518 transitions. [2022-03-03 19:41:17,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:17,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1995 states and 7518 transitions. [2022-03-03 19:41:17,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:41:17,617 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:41:17,617 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:41:17,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-03 19:41:17,832 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,SelfDestructingSolverStorable17 [2022-03-03 19:41:17,832 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:41:17,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:41:17,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1017584555, now seen corresponding path program 11 times [2022-03-03 19:41:17,833 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:41:17,833 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186628231] [2022-03-03 19:41:17,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:41:17,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:41:17,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:41:17,861 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:41:17,861 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:41:17,861 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186628231] [2022-03-03 19:41:17,861 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186628231] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:41:17,861 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041134364] [2022-03-03 19:41:17,861 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:41:17,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:17,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:41:17,862 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:41:17,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-03 19:41:17,903 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:41:17,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:41:17,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 19:41:17,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:41:17,945 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:41:17,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:41:17,978 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:41:17,978 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041134364] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:41:17,978 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:41:17,978 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-03 19:41:17,978 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570841986] [2022-03-03 19:41:17,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:41:17,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 19:41:17,979 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:41:17,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 19:41:17,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:41:17,979 INFO L87 Difference]: Start difference. First operand 1995 states and 7518 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 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) [2022-03-03 19:41:18,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:41:18,318 INFO L93 Difference]: Finished difference Result 4088 states and 14079 transitions. [2022-03-03 19:41:18,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-03 19:41:18,326 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 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 26 [2022-03-03 19:41:18,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:41:18,334 INFO L225 Difference]: With dead ends: 4088 [2022-03-03 19:41:18,334 INFO L226 Difference]: Without dead ends: 3536 [2022-03-03 19:41:18,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=227, Invalid=703, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:41:18,335 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 220 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:41:18,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 107 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:41:18,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3536 states. [2022-03-03 19:41:18,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3536 to 2540. [2022-03-03 19:41:18,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2540 states, 2539 states have (on average 3.588814493895234) internal successors, (9112), 2539 states have internal predecessors, (9112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:18,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2540 states to 2540 states and 9112 transitions. [2022-03-03 19:41:18,417 INFO L78 Accepts]: Start accepts. Automaton has 2540 states and 9112 transitions. Word has length 26 [2022-03-03 19:41:18,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:41:18,417 INFO L470 AbstractCegarLoop]: Abstraction has 2540 states and 9112 transitions. [2022-03-03 19:41:18,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 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) [2022-03-03 19:41:18,417 INFO L276 IsEmpty]: Start isEmpty. Operand 2540 states and 9112 transitions. [2022-03-03 19:41:18,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 19:41:18,422 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:41:18,422 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:41:18,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-03 19:41:18,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:18,638 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:41:18,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:41:18,638 INFO L85 PathProgramCache]: Analyzing trace with hash 226713273, now seen corresponding path program 12 times [2022-03-03 19:41:18,638 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:41:18,638 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912660119] [2022-03-03 19:41:18,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:41:18,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:41:18,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:41:18,668 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:18,669 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:41:18,669 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912660119] [2022-03-03 19:41:18,669 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912660119] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:41:18,669 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357498259] [2022-03-03 19:41:18,669 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:41:18,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:18,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:41:18,670 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:41:18,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-03 19:41:18,696 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:41:18,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:41:18,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 19:41:18,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:41:18,730 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:41:18,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:41:18,776 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:41:18,776 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357498259] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:41:18,776 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:41:18,776 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-03-03 19:41:18,776 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142902978] [2022-03-03 19:41:18,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:41:18,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-03 19:41:18,777 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:41:18,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-03 19:41:18,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-03 19:41:18,777 INFO L87 Difference]: Start difference. First operand 2540 states and 9112 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:18,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:41:18,881 INFO L93 Difference]: Finished difference Result 5012 states and 17668 transitions. [2022-03-03 19:41:18,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-03 19:41:18,881 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 19:41:18,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:41:18,892 INFO L225 Difference]: With dead ends: 5012 [2022-03-03 19:41:18,893 INFO L226 Difference]: Without dead ends: 4982 [2022-03-03 19:41:18,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-03 19:41:18,894 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 90 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:41:18,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 61 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:41:18,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4982 states. [2022-03-03 19:41:18,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4982 to 3891. [2022-03-03 19:41:18,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3891 states, 3890 states have (on average 3.6817480719794347) internal successors, (14322), 3890 states have internal predecessors, (14322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:18,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3891 states to 3891 states and 14322 transitions. [2022-03-03 19:41:18,991 INFO L78 Accepts]: Start accepts. Automaton has 3891 states and 14322 transitions. Word has length 28 [2022-03-03 19:41:18,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:41:18,991 INFO L470 AbstractCegarLoop]: Abstraction has 3891 states and 14322 transitions. [2022-03-03 19:41:18,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:18,992 INFO L276 IsEmpty]: Start isEmpty. Operand 3891 states and 14322 transitions. [2022-03-03 19:41:19,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 19:41:19,000 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:41:19,000 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:41:19,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-03 19:41:19,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:19,216 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:41:19,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:41:19,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1762243953, now seen corresponding path program 13 times [2022-03-03 19:41:19,216 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:41:19,216 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366669167] [2022-03-03 19:41:19,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:41:19,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:41:19,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:41:19,249 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:19,249 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:41:19,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366669167] [2022-03-03 19:41:19,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366669167] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:41:19,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875830374] [2022-03-03 19:41:19,249 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:41:19,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:19,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:41:19,250 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:41:19,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-03 19:41:19,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:41:19,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 19:41:19,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:41:19,331 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:41:19,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:41:19,402 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:41:19,402 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875830374] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:41:19,402 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:41:19,402 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 7 [2022-03-03 19:41:19,402 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694009744] [2022-03-03 19:41:19,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:41:19,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-03 19:41:19,406 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:41:19,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-03 19:41:19,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-03 19:41:19,411 INFO L87 Difference]: Start difference. First operand 3891 states and 14322 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:19,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:41:19,709 INFO L93 Difference]: Finished difference Result 9890 states and 33297 transitions. [2022-03-03 19:41:19,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-03 19:41:19,709 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 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 [2022-03-03 19:41:19,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:41:19,736 INFO L225 Difference]: With dead ends: 9890 [2022-03-03 19:41:19,736 INFO L226 Difference]: Without dead ends: 9836 [2022-03-03 19:41:19,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:41:19,737 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 199 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:41:19,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 131 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:41:19,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9836 states. [2022-03-03 19:41:19,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9836 to 6083. [2022-03-03 19:41:19,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6083 states, 6082 states have (on average 3.672640578756988) internal successors, (22337), 6082 states have internal predecessors, (22337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:19,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6083 states to 6083 states and 22337 transitions. [2022-03-03 19:41:19,927 INFO L78 Accepts]: Start accepts. Automaton has 6083 states and 22337 transitions. Word has length 28 [2022-03-03 19:41:19,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:41:19,928 INFO L470 AbstractCegarLoop]: Abstraction has 6083 states and 22337 transitions. [2022-03-03 19:41:19,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:19,929 INFO L276 IsEmpty]: Start isEmpty. Operand 6083 states and 22337 transitions. [2022-03-03 19:41:19,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 19:41:19,941 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:41:19,941 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:41:19,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-03 19:41:20,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:20,158 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:41:20,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:41:20,158 INFO L85 PathProgramCache]: Analyzing trace with hash 2006057489, now seen corresponding path program 14 times [2022-03-03 19:41:20,158 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:41:20,158 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081290912] [2022-03-03 19:41:20,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:41:20,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:41:20,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:41:20,209 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:20,209 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:41:20,209 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081290912] [2022-03-03 19:41:20,209 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081290912] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:41:20,209 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480101106] [2022-03-03 19:41:20,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:41:20,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:20,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:41:20,211 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:41:20,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-03 19:41:20,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:41:20,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:41:20,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 19:41:20,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:41:20,284 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:41:20,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:41:20,322 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:41:20,323 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480101106] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:41:20,323 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:41:20,323 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-03-03 19:41:20,323 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622101435] [2022-03-03 19:41:20,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:41:20,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-03 19:41:20,323 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:41:20,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-03 19:41:20,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-03 19:41:20,324 INFO L87 Difference]: Start difference. First operand 6083 states and 22337 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:20,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:41:20,434 INFO L93 Difference]: Finished difference Result 8194 states and 29343 transitions. [2022-03-03 19:41:20,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-03 19:41:20,434 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 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 28 [2022-03-03 19:41:20,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:41:20,452 INFO L225 Difference]: With dead ends: 8194 [2022-03-03 19:41:20,453 INFO L226 Difference]: Without dead ends: 8152 [2022-03-03 19:41:20,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-03-03 19:41:20,453 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 61 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:41:20,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 74 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:41:20,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8152 states. [2022-03-03 19:41:20,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8152 to 7162. [2022-03-03 19:41:20,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7162 states, 7161 states have (on average 3.697807568775311) internal successors, (26480), 7161 states have internal predecessors, (26480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:20,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7162 states to 7162 states and 26480 transitions. [2022-03-03 19:41:20,575 INFO L78 Accepts]: Start accepts. Automaton has 7162 states and 26480 transitions. Word has length 28 [2022-03-03 19:41:20,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:41:20,575 INFO L470 AbstractCegarLoop]: Abstraction has 7162 states and 26480 transitions. [2022-03-03 19:41:20,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:20,575 INFO L276 IsEmpty]: Start isEmpty. Operand 7162 states and 26480 transitions. [2022-03-03 19:41:20,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 19:41:20,587 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:41:20,587 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:41:20,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-03 19:41:20,803 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,SelfDestructingSolverStorable21 [2022-03-03 19:41:20,803 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:41:20,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:41:20,804 INFO L85 PathProgramCache]: Analyzing trace with hash -753379127, now seen corresponding path program 15 times [2022-03-03 19:41:20,804 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:41:20,804 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462311809] [2022-03-03 19:41:20,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:41:20,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:41:20,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:41:20,882 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:20,883 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:41:20,883 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462311809] [2022-03-03 19:41:20,883 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462311809] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:41:20,883 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278954754] [2022-03-03 19:41:20,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:41:20,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:20,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:41:20,901 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:41:20,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-03 19:41:20,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-03 19:41:20,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:41:20,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 19:41:20,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:41:20,995 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:41:20,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:41:21,056 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:41:21,056 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278954754] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:41:21,056 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:41:21,056 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-03-03 19:41:21,056 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186102153] [2022-03-03 19:41:21,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:41:21,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 19:41:21,057 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:41:21,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 19:41:21,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:41:21,057 INFO L87 Difference]: Start difference. First operand 7162 states and 26480 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:21,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:41:21,433 INFO L93 Difference]: Finished difference Result 11815 states and 40319 transitions. [2022-03-03 19:41:21,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-03 19:41:21,447 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 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 [2022-03-03 19:41:21,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:41:21,474 INFO L225 Difference]: With dead ends: 11815 [2022-03-03 19:41:21,474 INFO L226 Difference]: Without dead ends: 11657 [2022-03-03 19:41:21,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:41:21,475 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 208 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:41:21,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 171 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:41:21,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11657 states. [2022-03-03 19:41:21,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11657 to 9193. [2022-03-03 19:41:21,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9193 states, 9192 states have (on average 3.609769364664926) internal successors, (33181), 9192 states have internal predecessors, (33181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:21,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9193 states to 9193 states and 33181 transitions. [2022-03-03 19:41:21,736 INFO L78 Accepts]: Start accepts. Automaton has 9193 states and 33181 transitions. Word has length 28 [2022-03-03 19:41:21,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:41:21,736 INFO L470 AbstractCegarLoop]: Abstraction has 9193 states and 33181 transitions. [2022-03-03 19:41:21,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:21,737 INFO L276 IsEmpty]: Start isEmpty. Operand 9193 states and 33181 transitions. [2022-03-03 19:41:21,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:41:21,752 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:41:21,752 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:41:21,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-03 19:41:21,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:21,969 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:41:21,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:41:21,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1894836115, now seen corresponding path program 16 times [2022-03-03 19:41:21,969 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:41:21,969 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699608849] [2022-03-03 19:41:21,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:41:21,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:41:21,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:41:22,203 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:22,203 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:41:22,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699608849] [2022-03-03 19:41:22,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699608849] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:41:22,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260964347] [2022-03-03 19:41:22,203 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:41:22,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:22,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:41:22,205 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:41:22,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-03 19:41:22,230 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:41:22,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:41:22,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 19:41:22,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:41:22,427 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-03 19:41:22,526 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 33 treesize of output 25 [2022-03-03 19:41:22,528 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 28 treesize of output 20 [2022-03-03 19:41:22,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-03-03 19:41:22,570 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 29 treesize of output 21 [2022-03-03 19:41:22,600 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:22,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:41:22,699 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:41:22,699 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 518 treesize of output 486 [2022-03-03 19:41:22,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:22,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:22,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:22,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:22,933 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-03 19:41:22,933 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 38 treesize of output 63 [2022-03-03 19:41:22,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:22,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:22,956 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:41:22,957 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 26 treesize of output 55 [2022-03-03 19:41:23,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:23,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:23,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:23,086 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 38 treesize of output 22 [2022-03-03 19:41:23,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:23,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:23,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:23,090 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 22 treesize of output 5 [2022-03-03 19:41:23,136 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:23,136 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260964347] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:41:23,136 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:41:23,136 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-03 19:41:23,137 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165368654] [2022-03-03 19:41:23,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:41:23,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:41:23,137 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:41:23,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:41:23,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:41:23,137 INFO L87 Difference]: Start difference. First operand 9193 states and 33181 transitions. Second operand has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:23,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:41:23,914 INFO L93 Difference]: Finished difference Result 12792 states and 45116 transitions. [2022-03-03 19:41:23,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-03 19:41:23,914 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:41:23,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:41:24,025 INFO L225 Difference]: With dead ends: 12792 [2022-03-03 19:41:24,026 INFO L226 Difference]: Without dead ends: 12771 [2022-03-03 19:41:24,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=152, Invalid=904, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:41:24,026 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 224 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 983 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:41:24,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 200 Invalid, 1013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 983 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 19:41:24,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12771 states. [2022-03-03 19:41:24,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12771 to 9338. [2022-03-03 19:41:24,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9338 states, 9337 states have (on average 3.6080111384813107) internal successors, (33688), 9337 states have internal predecessors, (33688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:24,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9338 states to 9338 states and 33688 transitions. [2022-03-03 19:41:24,215 INFO L78 Accepts]: Start accepts. Automaton has 9338 states and 33688 transitions. Word has length 30 [2022-03-03 19:41:24,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:41:24,215 INFO L470 AbstractCegarLoop]: Abstraction has 9338 states and 33688 transitions. [2022-03-03 19:41:24,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:24,215 INFO L276 IsEmpty]: Start isEmpty. Operand 9338 states and 33688 transitions. [2022-03-03 19:41:24,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:41:24,231 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:41:24,232 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:41:24,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-03 19:41:24,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:24,449 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:41:24,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:41:24,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1216905027, now seen corresponding path program 17 times [2022-03-03 19:41:24,450 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:41:24,450 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666324142] [2022-03-03 19:41:24,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:41:24,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:41:24,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:41:24,679 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:24,680 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:41:24,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666324142] [2022-03-03 19:41:24,680 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666324142] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:41:24,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177448066] [2022-03-03 19:41:24,680 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:41:24,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:24,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:41:24,687 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:41:24,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-03 19:41:24,716 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:41:24,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:41:24,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 19:41:24,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:41:24,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-03 19:41:25,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:25,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:25,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:25,094 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 33 treesize of output 25 [2022-03-03 19:41:25,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:25,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:25,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:25,098 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2022-03-03 19:41:25,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:25,102 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 16 [2022-03-03 19:41:25,227 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 32 treesize of output 20 [2022-03-03 19:41:25,255 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:25,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:41:25,396 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:25,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:25,400 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 445 treesize of output 413 [2022-03-03 19:41:25,771 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 19:41:25,772 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 72 treesize of output 97 [2022-03-03 19:41:25,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:25,795 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:41:25,796 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 52 treesize of output 77 [2022-03-03 19:41:26,200 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:26,200 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177448066] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:41:26,200 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:41:26,200 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-03-03 19:41:26,200 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377738178] [2022-03-03 19:41:26,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:41:26,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:41:26,200 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:41:26,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:41:26,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:41:26,201 INFO L87 Difference]: Start difference. First operand 9338 states and 33688 transitions. Second operand has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 22 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:27,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:41:27,604 INFO L93 Difference]: Finished difference Result 9951 states and 35487 transitions. [2022-03-03 19:41:27,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-03 19:41:27,605 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 22 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:41:27,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:41:27,626 INFO L225 Difference]: With dead ends: 9951 [2022-03-03 19:41:27,626 INFO L226 Difference]: Without dead ends: 9924 [2022-03-03 19:41:27,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=175, Invalid=1231, Unknown=0, NotChecked=0, Total=1406 [2022-03-03 19:41:27,627 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 177 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 1300 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 1952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 632 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:41:27,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 322 Invalid, 1952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1300 Invalid, 0 Unknown, 632 Unchecked, 0.7s Time] [2022-03-03 19:41:27,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9924 states. [2022-03-03 19:41:27,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9924 to 9370. [2022-03-03 19:41:27,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9370 states, 9369 states have (on average 3.604653644999466) internal successors, (33772), 9369 states have internal predecessors, (33772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:27,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9370 states to 9370 states and 33772 transitions. [2022-03-03 19:41:27,772 INFO L78 Accepts]: Start accepts. Automaton has 9370 states and 33772 transitions. Word has length 30 [2022-03-03 19:41:27,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:41:27,772 INFO L470 AbstractCegarLoop]: Abstraction has 9370 states and 33772 transitions. [2022-03-03 19:41:27,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 22 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:27,772 INFO L276 IsEmpty]: Start isEmpty. Operand 9370 states and 33772 transitions. [2022-03-03 19:41:27,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:41:27,833 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:41:27,834 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:41:27,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-03 19:41:28,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:28,050 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:41:28,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:41:28,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1367781517, now seen corresponding path program 18 times [2022-03-03 19:41:28,051 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:41:28,051 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989404197] [2022-03-03 19:41:28,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:41:28,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:41:28,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:41:28,282 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:28,282 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:41:28,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989404197] [2022-03-03 19:41:28,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989404197] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:41:28,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940715594] [2022-03-03 19:41:28,283 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:41:28,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:28,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:41:28,295 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:41:28,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-03 19:41:28,323 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:41:28,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:41:28,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 19:41:28,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:41:28,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-03 19:41:28,664 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 35 treesize of output 27 [2022-03-03 19:41:28,666 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 28 treesize of output 20 [2022-03-03 19:41:28,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:28,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-03-03 19:41:28,709 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 22 treesize of output 14 [2022-03-03 19:41:28,731 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:28,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:41:28,862 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:41:28,862 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 614 treesize of output 582 [2022-03-03 19:41:28,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:28,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:28,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:28,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:29,002 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-03 19:41:29,002 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 38 treesize of output 63 [2022-03-03 19:41:29,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:29,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:29,021 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:41:29,021 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 26 treesize of output 55 [2022-03-03 19:41:29,130 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:29,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:29,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:29,132 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 38 treesize of output 22 [2022-03-03 19:41:29,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:29,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:29,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:29,135 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 22 treesize of output 5 [2022-03-03 19:41:29,182 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:29,182 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940715594] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:41:29,182 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:41:29,182 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-03 19:41:29,182 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675160516] [2022-03-03 19:41:29,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:41:29,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:41:29,183 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:41:29,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:41:29,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:41:29,183 INFO L87 Difference]: Start difference. First operand 9370 states and 33772 transitions. Second operand has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:30,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:41:30,159 INFO L93 Difference]: Finished difference Result 13421 states and 47075 transitions. [2022-03-03 19:41:30,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-03 19:41:30,159 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:41:30,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:41:30,192 INFO L225 Difference]: With dead ends: 13421 [2022-03-03 19:41:30,192 INFO L226 Difference]: Without dead ends: 13367 [2022-03-03 19:41:30,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=192, Invalid=998, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 19:41:30,193 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 214 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 1154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:41:30,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 189 Invalid, 1154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1116 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 19:41:30,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13367 states. [2022-03-03 19:41:30,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13367 to 9537. [2022-03-03 19:41:30,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9537 states, 9536 states have (on average 3.606753355704698) internal successors, (34394), 9536 states have internal predecessors, (34394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:30,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9537 states to 9537 states and 34394 transitions. [2022-03-03 19:41:30,380 INFO L78 Accepts]: Start accepts. Automaton has 9537 states and 34394 transitions. Word has length 30 [2022-03-03 19:41:30,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:41:30,381 INFO L470 AbstractCegarLoop]: Abstraction has 9537 states and 34394 transitions. [2022-03-03 19:41:30,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:30,381 INFO L276 IsEmpty]: Start isEmpty. Operand 9537 states and 34394 transitions. [2022-03-03 19:41:30,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:41:30,396 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:41:30,396 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:41:30,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-03 19:41:30,600 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,SelfDestructingSolverStorable25 [2022-03-03 19:41:30,601 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:41:30,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:41:30,601 INFO L85 PathProgramCache]: Analyzing trace with hash 782322175, now seen corresponding path program 19 times [2022-03-03 19:41:30,601 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:41:30,601 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496373693] [2022-03-03 19:41:30,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:41:30,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:41:30,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:41:30,910 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:30,910 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:41:30,910 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496373693] [2022-03-03 19:41:30,910 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496373693] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:41:30,910 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946675822] [2022-03-03 19:41:30,911 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:41:30,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:30,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:41:30,912 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:41:30,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-03 19:41:30,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:41:30,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 19:41:30,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:41:31,108 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-03 19:41:31,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:31,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:31,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2022-03-03 19:41:31,304 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 43 treesize of output 37 [2022-03-03 19:41:31,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2022-03-03 19:41:31,341 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 27 treesize of output 19 [2022-03-03 19:41:31,375 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:31,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:41:31,461 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:41:31,461 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 614 treesize of output 582 [2022-03-03 19:41:31,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:31,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:31,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:31,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:31,574 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-03 19:41:31,574 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 38 treesize of output 63 [2022-03-03 19:41:31,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:31,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:31,587 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:41:31,587 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 26 treesize of output 55 [2022-03-03 19:41:31,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:31,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:31,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:31,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2022-03-03 19:41:31,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:31,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:31,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:31,701 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 22 treesize of output 5 [2022-03-03 19:41:31,744 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:31,745 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946675822] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:41:31,745 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:41:31,745 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 20 [2022-03-03 19:41:31,745 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240915461] [2022-03-03 19:41:31,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:41:31,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:41:31,746 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:41:31,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:41:31,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:41:31,746 INFO L87 Difference]: Start difference. First operand 9537 states and 34394 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:32,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:41:32,878 INFO L93 Difference]: Finished difference Result 13632 states and 47787 transitions. [2022-03-03 19:41:32,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-03 19:41:32,878 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 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 30 [2022-03-03 19:41:32,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:41:32,908 INFO L225 Difference]: With dead ends: 13632 [2022-03-03 19:41:32,908 INFO L226 Difference]: Without dead ends: 13611 [2022-03-03 19:41:32,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=172, Invalid=1088, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 19:41:32,909 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 194 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 1619 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 1660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:41:32,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 347 Invalid, 1660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1619 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-03 19:41:32,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13611 states. [2022-03-03 19:41:33,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13611 to 9566. [2022-03-03 19:41:33,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9566 states, 9565 states have (on average 3.6065865133298485) internal successors, (34497), 9565 states have internal predecessors, (34497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:33,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9566 states to 9566 states and 34497 transitions. [2022-03-03 19:41:33,094 INFO L78 Accepts]: Start accepts. Automaton has 9566 states and 34497 transitions. Word has length 30 [2022-03-03 19:41:33,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:41:33,094 INFO L470 AbstractCegarLoop]: Abstraction has 9566 states and 34497 transitions. [2022-03-03 19:41:33,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:33,094 INFO L276 IsEmpty]: Start isEmpty. Operand 9566 states and 34497 transitions. [2022-03-03 19:41:33,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:41:33,109 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:41:33,109 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:41:33,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-03 19:41:33,324 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,SelfDestructingSolverStorable26 [2022-03-03 19:41:33,324 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:41:33,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:41:33,325 INFO L85 PathProgramCache]: Analyzing trace with hash -336473117, now seen corresponding path program 20 times [2022-03-03 19:41:33,325 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:41:33,325 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791796616] [2022-03-03 19:41:33,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:41:33,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:41:33,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:41:33,567 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:33,567 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:41:33,568 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791796616] [2022-03-03 19:41:33,568 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791796616] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:41:33,568 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507254866] [2022-03-03 19:41:33,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:41:33,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:33,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:41:33,569 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:41:33,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-03 19:41:33,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:41:33,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:41:33,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 19:41:33,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:41:33,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-03 19:41:33,805 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:33,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:33,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 39 [2022-03-03 19:41:33,880 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 30 treesize of output 22 [2022-03-03 19:41:33,882 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 27 treesize of output 19 [2022-03-03 19:41:33,897 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 11 treesize of output 7 [2022-03-03 19:41:33,928 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:33,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:41:34,032 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:41:34,032 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 614 treesize of output 582 [2022-03-03 19:41:34,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:34,141 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:34,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:34,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:34,217 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-03 19:41:34,217 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 38 treesize of output 63 [2022-03-03 19:41:34,221 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:34,221 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:34,235 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:41:34,235 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 26 treesize of output 55 [2022-03-03 19:41:34,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:34,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:34,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:34,347 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 38 treesize of output 22 [2022-03-03 19:41:34,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:34,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:34,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:34,350 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-03 19:41:34,394 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:34,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507254866] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:41:34,394 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:41:34,394 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 20 [2022-03-03 19:41:34,394 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138280324] [2022-03-03 19:41:34,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:41:34,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:41:34,395 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:41:34,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:41:34,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:41:34,395 INFO L87 Difference]: Start difference. First operand 9566 states and 34497 transitions. Second operand has 21 states, 21 states have (on average 3.0) 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) [2022-03-03 19:41:35,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:41:35,747 INFO L93 Difference]: Finished difference Result 13438 states and 47172 transitions. [2022-03-03 19:41:35,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-03 19:41:35,751 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) 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 30 [2022-03-03 19:41:35,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:41:35,783 INFO L225 Difference]: With dead ends: 13438 [2022-03-03 19:41:35,784 INFO L226 Difference]: Without dead ends: 13417 [2022-03-03 19:41:35,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=223, Invalid=1417, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:41:35,784 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 205 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 1886 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 1930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 19:41:35,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 352 Invalid, 1930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1886 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-03 19:41:35,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13417 states. [2022-03-03 19:41:35,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13417 to 9556. [2022-03-03 19:41:36,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9556 states, 9555 states have (on average 3.6063840920983776) internal successors, (34459), 9555 states have internal predecessors, (34459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:36,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9556 states to 9556 states and 34459 transitions. [2022-03-03 19:41:36,039 INFO L78 Accepts]: Start accepts. Automaton has 9556 states and 34459 transitions. Word has length 30 [2022-03-03 19:41:36,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:41:36,039 INFO L470 AbstractCegarLoop]: Abstraction has 9556 states and 34459 transitions. [2022-03-03 19:41:36,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0) 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) [2022-03-03 19:41:36,040 INFO L276 IsEmpty]: Start isEmpty. Operand 9556 states and 34459 transitions. [2022-03-03 19:41:36,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:41:36,055 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:41:36,055 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:41:36,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-03-03 19:41:36,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-03 19:41:36,271 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:41:36,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:41:36,271 INFO L85 PathProgramCache]: Analyzing trace with hash 418455901, now seen corresponding path program 21 times [2022-03-03 19:41:36,272 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:41:36,272 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798322047] [2022-03-03 19:41:36,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:41:36,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:41:36,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:41:36,459 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:36,460 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:41:36,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798322047] [2022-03-03 19:41:36,460 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798322047] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:41:36,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69552438] [2022-03-03 19:41:36,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:41:36,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:36,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:41:36,462 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:41:36,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-03 19:41:36,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:41:36,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:41:36,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-03 19:41:36,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:41:36,581 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-03 19:41:36,758 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:41:36,758 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 33 treesize of output 41 [2022-03-03 19:41:36,766 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:41:36,766 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 55 treesize of output 61 [2022-03-03 19:41:36,775 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-03-03 19:41:36,775 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-03 19:41:36,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:36,976 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:41:36,976 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 26 treesize of output 26 [2022-03-03 19:41:37,029 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:37,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:41:37,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:37,484 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 113 treesize of output 109 [2022-03-03 19:41:37,704 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 19:41:37,705 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 73 treesize of output 98 [2022-03-03 19:41:37,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:37,728 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:41:37,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 78 [2022-03-03 19:41:38,124 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:38,124 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69552438] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:41:38,124 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:41:38,124 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 27 [2022-03-03 19:41:38,124 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895523365] [2022-03-03 19:41:38,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:41:38,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 19:41:38,125 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:41:38,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 19:41:38,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:41:38,125 INFO L87 Difference]: Start difference. First operand 9556 states and 34459 transitions. Second operand has 28 states, 28 states have (on average 2.75) internal successors, (77), 27 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:42,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:41:42,859 INFO L93 Difference]: Finished difference Result 20722 states and 72136 transitions. [2022-03-03 19:41:42,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-03-03 19:41:42,859 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.75) internal successors, (77), 27 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:41:42,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:41:42,905 INFO L225 Difference]: With dead ends: 20722 [2022-03-03 19:41:42,905 INFO L226 Difference]: Without dead ends: 20668 [2022-03-03 19:41:42,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 45 SyntacticMatches, 6 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3576 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1107, Invalid=9813, Unknown=0, NotChecked=0, Total=10920 [2022-03-03 19:41:42,907 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 590 mSDsluCounter, 1750 mSDsCounter, 0 mSdLazyCounter, 2765 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 590 SdHoareTripleChecker+Valid, 851 SdHoareTripleChecker+Invalid, 5299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 2765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2451 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:41:42,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [590 Valid, 851 Invalid, 5299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 2765 Invalid, 0 Unknown, 2451 Unchecked, 1.4s Time] [2022-03-03 19:41:42,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20668 states. [2022-03-03 19:41:43,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20668 to 9634. [2022-03-03 19:41:43,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9634 states, 9633 states have (on average 3.6039655351396243) internal successors, (34717), 9633 states have internal predecessors, (34717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:43,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9634 states to 9634 states and 34717 transitions. [2022-03-03 19:41:43,147 INFO L78 Accepts]: Start accepts. Automaton has 9634 states and 34717 transitions. Word has length 30 [2022-03-03 19:41:43,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:41:43,147 INFO L470 AbstractCegarLoop]: Abstraction has 9634 states and 34717 transitions. [2022-03-03 19:41:43,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.75) internal successors, (77), 27 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:43,147 INFO L276 IsEmpty]: Start isEmpty. Operand 9634 states and 34717 transitions. [2022-03-03 19:41:43,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:41:43,161 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:41:43,161 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:41:43,176 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-03-03 19:41:43,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:43,363 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:41:43,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:41:43,363 INFO L85 PathProgramCache]: Analyzing trace with hash 2138468893, now seen corresponding path program 22 times [2022-03-03 19:41:43,363 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:41:43,363 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49916427] [2022-03-03 19:41:43,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:41:43,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:41:43,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:41:43,623 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:43,623 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:41:43,623 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49916427] [2022-03-03 19:41:43,623 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49916427] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:41:43,623 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811745855] [2022-03-03 19:41:43,624 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:41:43,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:43,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:41:43,643 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:41:43,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-03 19:41:43,676 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:41:43,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:41:43,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 19:41:43,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:41:43,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-03 19:41:43,899 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 33 treesize of output 25 [2022-03-03 19:41:43,901 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 28 treesize of output 20 [2022-03-03 19:41:43,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 16 [2022-03-03 19:41:44,034 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 32 treesize of output 20 [2022-03-03 19:41:44,054 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:44,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:41:44,176 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:41:44,176 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 2390 treesize of output 2294 [2022-03-03 19:41:44,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:44,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:44,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:44,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:44,855 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-03 19:41:44,855 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 38 treesize of output 63 [2022-03-03 19:41:44,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:44,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:44,874 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:41:44,875 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 26 treesize of output 55 [2022-03-03 19:41:44,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:44,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:44,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:44,968 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 38 treesize of output 22 [2022-03-03 19:41:44,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:44,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:44,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:44,971 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 22 treesize of output 5 [2022-03-03 19:41:45,015 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:45,015 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811745855] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:41:45,015 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:41:45,015 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-03 19:41:45,015 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658873912] [2022-03-03 19:41:45,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:41:45,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:41:45,016 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:41:45,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:41:45,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:41:45,016 INFO L87 Difference]: Start difference. First operand 9634 states and 34717 transitions. Second operand has 20 states, 20 states have (on average 3.5) internal successors, (70), 19 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:46,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:41:46,051 INFO L93 Difference]: Finished difference Result 13699 states and 47972 transitions. [2022-03-03 19:41:46,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-03 19:41:46,052 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 19 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:41:46,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:41:46,081 INFO L225 Difference]: With dead ends: 13699 [2022-03-03 19:41:46,081 INFO L226 Difference]: Without dead ends: 13656 [2022-03-03 19:41:46,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=166, Invalid=1166, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 19:41:46,082 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 209 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 1364 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 1397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:41:46,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 287 Invalid, 1397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1364 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 19:41:46,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13656 states. [2022-03-03 19:41:46,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13656 to 9867. [2022-03-03 19:41:46,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9867 states, 9866 states have (on average 3.5997364686803164) internal successors, (35515), 9866 states have internal predecessors, (35515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:46,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9867 states to 9867 states and 35515 transitions. [2022-03-03 19:41:46,305 INFO L78 Accepts]: Start accepts. Automaton has 9867 states and 35515 transitions. Word has length 30 [2022-03-03 19:41:46,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:41:46,305 INFO L470 AbstractCegarLoop]: Abstraction has 9867 states and 35515 transitions. [2022-03-03 19:41:46,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 19 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:46,306 INFO L276 IsEmpty]: Start isEmpty. Operand 9867 states and 35515 transitions. [2022-03-03 19:41:46,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:41:46,321 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:41:46,321 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:41:46,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-03 19:41:46,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:46,536 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:41:46,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:41:46,536 INFO L85 PathProgramCache]: Analyzing trace with hash -586467713, now seen corresponding path program 23 times [2022-03-03 19:41:46,536 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:41:46,536 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582829140] [2022-03-03 19:41:46,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:41:46,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:41:46,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:41:46,844 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:46,844 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:41:46,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582829140] [2022-03-03 19:41:46,845 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582829140] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:41:46,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273765867] [2022-03-03 19:41:46,845 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:41:46,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:46,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:41:46,847 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:41:46,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-03 19:41:46,879 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-03 19:41:46,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:41:46,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-03 19:41:46,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:41:47,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-03 19:41:47,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:47,113 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-03-03 19:41:47,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:47,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:47,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:47,395 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:41:47,395 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 45 treesize of output 63 [2022-03-03 19:41:47,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:47,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:47,542 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:47,542 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:47,543 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 32 treesize of output 22 [2022-03-03 19:41:47,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:47,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:47,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:47,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:47,546 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 15 [2022-03-03 19:41:47,577 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:47,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:41:47,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:47,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:47,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:48,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:48,082 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-03 19:41:48,082 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 77 treesize of output 90 [2022-03-03 19:41:48,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:48,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:48,100 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:41:48,101 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 53 treesize of output 70 [2022-03-03 19:41:48,336 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:48,336 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273765867] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:41:48,336 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:41:48,336 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-03-03 19:41:48,336 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694453878] [2022-03-03 19:41:48,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:41:48,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-03 19:41:48,337 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:41:48,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-03 19:41:48,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:41:48,337 INFO L87 Difference]: Start difference. First operand 9867 states and 35515 transitions. Second operand has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:56,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:41:56,971 INFO L93 Difference]: Finished difference Result 21914 states and 76487 transitions. [2022-03-03 19:41:56,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-03-03 19:41:56,971 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:41:56,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:41:57,022 INFO L225 Difference]: With dead ends: 21914 [2022-03-03 19:41:57,023 INFO L226 Difference]: Without dead ends: 21875 [2022-03-03 19:41:57,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7848 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=2494, Invalid=18676, Unknown=0, NotChecked=0, Total=21170 [2022-03-03 19:41:57,027 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 487 mSDsluCounter, 1972 mSDsCounter, 0 mSdLazyCounter, 2846 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 876 SdHoareTripleChecker+Invalid, 6896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 2846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3947 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:41:57,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 876 Invalid, 6896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 2846 Invalid, 0 Unknown, 3947 Unchecked, 1.5s Time] [2022-03-03 19:41:57,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21875 states. [2022-03-03 19:41:57,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21875 to 10145. [2022-03-03 19:41:57,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10145 states, 10144 states have (on average 3.597594637223975) internal successors, (36494), 10144 states have internal predecessors, (36494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:57,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10145 states to 10145 states and 36494 transitions. [2022-03-03 19:41:57,342 INFO L78 Accepts]: Start accepts. Automaton has 10145 states and 36494 transitions. Word has length 30 [2022-03-03 19:41:57,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:41:57,342 INFO L470 AbstractCegarLoop]: Abstraction has 10145 states and 36494 transitions. [2022-03-03 19:41:57,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:57,342 INFO L276 IsEmpty]: Start isEmpty. Operand 10145 states and 36494 transitions. [2022-03-03 19:41:57,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:41:57,358 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:41:57,358 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:41:57,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-03 19:41:57,571 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,SelfDestructingSolverStorable30 [2022-03-03 19:41:57,571 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:41:57,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:41:57,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1705263005, now seen corresponding path program 24 times [2022-03-03 19:41:57,572 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:41:57,572 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540008216] [2022-03-03 19:41:57,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:41:57,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:41:57,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:41:57,830 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:57,831 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:41:57,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540008216] [2022-03-03 19:41:57,831 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540008216] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:41:57,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646661027] [2022-03-03 19:41:57,831 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:41:57,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:57,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:41:57,832 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:41:57,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-03 19:41:57,862 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-03 19:41:57,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:41:57,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-03 19:41:57,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:41:57,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-03 19:41:58,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2022-03-03 19:41:58,244 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 32 treesize of output 24 [2022-03-03 19:41:58,247 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 29 treesize of output 21 [2022-03-03 19:41:58,291 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:41:58,291 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 31 treesize of output 39 [2022-03-03 19:41:58,486 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:58,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:41:58,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:58,950 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:41:58,950 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 1149 treesize of output 1110 [2022-03-03 19:41:59,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:59,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:59,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:59,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:59,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2022-03-03 19:41:59,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:59,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:59,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:59,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:59,854 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 22 treesize of output 5 [2022-03-03 19:41:59,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:59,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:59,865 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:59,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:59,866 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 87 treesize of output 58 [2022-03-03 19:41:59,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:59,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:59,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:59,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:59,871 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 58 treesize of output 28 [2022-03-03 19:41:59,881 WARN L234 Elim1Store]: Array PQE input equivalent to true [2022-03-03 19:41:59,967 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:59,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646661027] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:41:59,967 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:41:59,967 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 30 [2022-03-03 19:41:59,967 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716348258] [2022-03-03 19:41:59,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:41:59,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:41:59,968 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:41:59,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:41:59,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:41:59,969 INFO L87 Difference]: Start difference. First operand 10145 states and 36494 transitions. Second operand has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:28,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:42:29,000 INFO L93 Difference]: Finished difference Result 25914 states and 90193 transitions. [2022-03-03 19:42:29,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 183 states. [2022-03-03 19:42:29,000 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:42:29,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:42:29,065 INFO L225 Difference]: With dead ends: 25914 [2022-03-03 19:42:29,066 INFO L226 Difference]: Without dead ends: 25884 [2022-03-03 19:42:29,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 47 SyntacticMatches, 8 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13959 ImplicationChecksByTransitivity, 28.1s TimeCoverageRelationStatistics Valid=3729, Invalid=31803, Unknown=0, NotChecked=0, Total=35532 [2022-03-03 19:42:29,070 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 573 mSDsluCounter, 2057 mSDsCounter, 0 mSdLazyCounter, 1814 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 573 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 6627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4690 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:42:29,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [573 Valid, 776 Invalid, 6627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1814 Invalid, 0 Unknown, 4690 Unchecked, 1.1s Time] [2022-03-03 19:42:29,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25884 states. [2022-03-03 19:42:29,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25884 to 10509. [2022-03-03 19:42:29,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10509 states, 10508 states have (on average 3.586410354015988) internal successors, (37686), 10508 states have internal predecessors, (37686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:29,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10509 states to 10509 states and 37686 transitions. [2022-03-03 19:42:29,351 INFO L78 Accepts]: Start accepts. Automaton has 10509 states and 37686 transitions. Word has length 30 [2022-03-03 19:42:29,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:42:29,352 INFO L470 AbstractCegarLoop]: Abstraction has 10509 states and 37686 transitions. [2022-03-03 19:42:29,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:29,352 INFO L276 IsEmpty]: Start isEmpty. Operand 10509 states and 37686 transitions. [2022-03-03 19:42:29,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:42:29,382 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:42:29,382 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:42:29,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-03 19:42:29,582 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,SelfDestructingSolverStorable31 [2022-03-03 19:42:29,583 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:42:29,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:42:29,583 INFO L85 PathProgramCache]: Analyzing trace with hash 66333555, now seen corresponding path program 25 times [2022-03-03 19:42:29,583 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:42:29,583 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159095992] [2022-03-03 19:42:29,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:42:29,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:42:29,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:42:29,866 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:29,867 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:42:29,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159095992] [2022-03-03 19:42:29,867 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159095992] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:42:29,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055940772] [2022-03-03 19:42:29,867 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:42:29,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:42:29,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:42:29,869 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:42:29,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-03 19:42:29,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:42:29,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 19:42:29,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:42:30,052 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-03 19:42:30,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:30,114 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-03-03 19:42:30,244 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 34 treesize of output 26 [2022-03-03 19:42:30,247 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 29 treesize of output 21 [2022-03-03 19:42:30,275 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 22 treesize of output 14 [2022-03-03 19:42:30,311 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:30,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:42:30,435 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:42:30,436 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 2390 treesize of output 2294 [2022-03-03 19:42:31,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:31,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:31,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:31,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:31,150 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-03 19:42:31,150 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 38 treesize of output 63 [2022-03-03 19:42:31,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:31,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:31,169 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:42:31,169 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 26 treesize of output 55 [2022-03-03 19:42:31,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:31,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:31,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:31,274 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 38 treesize of output 22 [2022-03-03 19:42:31,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:31,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:31,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:31,277 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 22 treesize of output 5 [2022-03-03 19:42:31,324 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:31,324 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055940772] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:42:31,324 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:42:31,324 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 20 [2022-03-03 19:42:31,324 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859283986] [2022-03-03 19:42:31,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:42:31,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:42:31,325 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:42:31,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:42:31,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:42:31,325 INFO L87 Difference]: Start difference. First operand 10509 states and 37686 transitions. Second operand has 21 states, 21 states have (on average 3.0) 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) [2022-03-03 19:42:32,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:42:32,427 INFO L93 Difference]: Finished difference Result 14830 states and 51892 transitions. [2022-03-03 19:42:32,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-03 19:42:32,427 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) 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 30 [2022-03-03 19:42:32,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:42:32,459 INFO L225 Difference]: With dead ends: 14830 [2022-03-03 19:42:32,460 INFO L226 Difference]: Without dead ends: 14791 [2022-03-03 19:42:32,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=168, Invalid=1164, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 19:42:32,460 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 177 mSDsluCounter, 745 mSDsCounter, 0 mSdLazyCounter, 1686 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 1731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:42:32,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 388 Invalid, 1731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1686 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-03 19:42:32,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14791 states. [2022-03-03 19:42:32,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14791 to 10482. [2022-03-03 19:42:32,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10482 states, 10481 states have (on average 3.5968896097700602) internal successors, (37699), 10481 states have internal predecessors, (37699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:32,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10482 states to 10482 states and 37699 transitions. [2022-03-03 19:42:32,695 INFO L78 Accepts]: Start accepts. Automaton has 10482 states and 37699 transitions. Word has length 30 [2022-03-03 19:42:32,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:42:32,695 INFO L470 AbstractCegarLoop]: Abstraction has 10482 states and 37699 transitions. [2022-03-03 19:42:32,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0) 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) [2022-03-03 19:42:32,695 INFO L276 IsEmpty]: Start isEmpty. Operand 10482 states and 37699 transitions. [2022-03-03 19:42:32,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:42:32,711 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:42:32,711 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:42:32,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-03 19:42:32,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:42:32,926 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:42:32,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:42:32,927 INFO L85 PathProgramCache]: Analyzing trace with hash 639992413, now seen corresponding path program 26 times [2022-03-03 19:42:32,927 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:42:32,927 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139855475] [2022-03-03 19:42:32,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:42:32,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:42:32,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:42:33,235 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:33,235 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:42:33,235 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139855475] [2022-03-03 19:42:33,235 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139855475] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:42:33,235 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066025992] [2022-03-03 19:42:33,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:42:33,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:42:33,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:42:33,252 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:42:33,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-03 19:42:33,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:42:33,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:42:33,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 19:42:33,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:42:33,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-03 19:42:33,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2022-03-03 19:42:33,494 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 32 treesize of output 24 [2022-03-03 19:42:33,496 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 34 treesize of output 26 [2022-03-03 19:42:33,537 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 32 treesize of output 20 [2022-03-03 19:42:33,561 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:33,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:42:33,675 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:42:33,675 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 2390 treesize of output 2294 [2022-03-03 19:42:34,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:34,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:34,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:34,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:34,788 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-03 19:42:34,788 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 38 treesize of output 63 [2022-03-03 19:42:34,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:34,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:34,807 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:42:34,807 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 26 treesize of output 55 [2022-03-03 19:42:34,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:34,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:34,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:34,903 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 38 treesize of output 22 [2022-03-03 19:42:34,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:34,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:34,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:34,907 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 22 treesize of output 5 [2022-03-03 19:42:34,954 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:34,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066025992] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:42:34,954 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:42:34,954 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 20 [2022-03-03 19:42:34,954 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988803470] [2022-03-03 19:42:34,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:42:34,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:42:34,955 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:42:34,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:42:34,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:42:34,955 INFO L87 Difference]: Start difference. First operand 10482 states and 37699 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:36,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:42:36,267 INFO L93 Difference]: Finished difference Result 14320 states and 50335 transitions. [2022-03-03 19:42:36,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-03 19:42:36,267 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 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 30 [2022-03-03 19:42:36,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:42:36,299 INFO L225 Difference]: With dead ends: 14320 [2022-03-03 19:42:36,299 INFO L226 Difference]: Without dead ends: 14281 [2022-03-03 19:42:36,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=150, Invalid=1040, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 19:42:36,301 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 171 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 1764 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 1800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 19:42:36,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 395 Invalid, 1800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1764 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-03 19:42:36,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14281 states. [2022-03-03 19:42:36,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14281 to 10505. [2022-03-03 19:42:36,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10505 states, 10504 states have (on average 3.598153084539223) internal successors, (37795), 10504 states have internal predecessors, (37795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:36,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10505 states to 10505 states and 37795 transitions. [2022-03-03 19:42:36,483 INFO L78 Accepts]: Start accepts. Automaton has 10505 states and 37795 transitions. Word has length 30 [2022-03-03 19:42:36,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:42:36,483 INFO L470 AbstractCegarLoop]: Abstraction has 10505 states and 37795 transitions. [2022-03-03 19:42:36,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:36,483 INFO L276 IsEmpty]: Start isEmpty. Operand 10505 states and 37795 transitions. [2022-03-03 19:42:36,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:42:36,499 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:42:36,500 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:42:36,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-03 19:42:36,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:42:36,704 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:42:36,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:42:36,704 INFO L85 PathProgramCache]: Analyzing trace with hash -35543505, now seen corresponding path program 27 times [2022-03-03 19:42:36,704 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:42:36,704 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106377559] [2022-03-03 19:42:36,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:42:36,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:42:36,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:42:36,895 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:36,895 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:42:36,895 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106377559] [2022-03-03 19:42:36,895 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106377559] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:42:36,895 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005646483] [2022-03-03 19:42:36,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:42:36,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:42:36,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:42:36,912 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:42:36,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-03 19:42:36,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:42:36,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:42:36,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-03 19:42:36,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:42:37,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-03 19:42:37,319 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 38 treesize of output 30 [2022-03-03 19:42:37,321 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 28 treesize of output 20 [2022-03-03 19:42:37,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-03-03 19:42:37,416 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:42:37,416 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 [2022-03-03 19:42:37,535 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:37,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:42:38,153 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:38,181 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-03 19:42:38,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 124 treesize of output 133 [2022-03-03 19:42:38,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:38,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:38,203 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:42:38,203 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 96 treesize of output 109 [2022-03-03 19:42:38,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:38,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:38,208 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 81 treesize of output 77 [2022-03-03 19:42:38,504 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:38,504 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005646483] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:42:38,504 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:42:38,504 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 28 [2022-03-03 19:42:38,504 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114136043] [2022-03-03 19:42:38,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:42:38,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-03 19:42:38,504 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:42:38,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-03 19:42:38,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:42:38,505 INFO L87 Difference]: Start difference. First operand 10505 states and 37795 transitions. Second operand has 29 states, 29 states have (on average 2.8275862068965516) internal successors, (82), 28 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:41,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:42:41,239 INFO L93 Difference]: Finished difference Result 19262 states and 66696 transitions. [2022-03-03 19:42:41,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-03 19:42:41,239 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.8275862068965516) internal successors, (82), 28 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:42:41,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:42:41,282 INFO L225 Difference]: With dead ends: 19262 [2022-03-03 19:42:41,282 INFO L226 Difference]: Without dead ends: 19205 [2022-03-03 19:42:41,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1677 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=597, Invalid=5409, Unknown=0, NotChecked=0, Total=6006 [2022-03-03 19:42:41,283 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 324 mSDsluCounter, 1038 mSDsCounter, 0 mSdLazyCounter, 1861 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 3154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1241 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 19:42:41,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 600 Invalid, 3154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1861 Invalid, 0 Unknown, 1241 Unchecked, 0.9s Time] [2022-03-03 19:42:41,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19205 states. [2022-03-03 19:42:41,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19205 to 10656. [2022-03-03 19:42:41,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10656 states, 10655 states have (on average 3.596433599249179) internal successors, (38320), 10655 states have internal predecessors, (38320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:41,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10656 states to 10656 states and 38320 transitions. [2022-03-03 19:42:41,507 INFO L78 Accepts]: Start accepts. Automaton has 10656 states and 38320 transitions. Word has length 30 [2022-03-03 19:42:41,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:42:41,507 INFO L470 AbstractCegarLoop]: Abstraction has 10656 states and 38320 transitions. [2022-03-03 19:42:41,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.8275862068965516) internal successors, (82), 28 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:41,507 INFO L276 IsEmpty]: Start isEmpty. Operand 10656 states and 38320 transitions. [2022-03-03 19:42:41,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:42:41,522 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:42:41,522 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:42:41,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-03 19:42:41,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:42:41,738 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:42:41,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:42:41,738 INFO L85 PathProgramCache]: Analyzing trace with hash 2114560187, now seen corresponding path program 28 times [2022-03-03 19:42:41,738 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:42:41,738 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231796518] [2022-03-03 19:42:41,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:42:41,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:42:41,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:42:42,004 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:42,004 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:42:42,004 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231796518] [2022-03-03 19:42:42,005 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231796518] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:42:42,005 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444915629] [2022-03-03 19:42:42,005 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:42:42,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:42:42,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:42:42,006 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:42:42,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-03 19:42:42,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:42:42,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:42:42,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 19:42:42,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:42:42,127 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-03 19:42:42,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:42,271 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2022-03-03 19:42:42,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:42,350 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 54 treesize of output 46 [2022-03-03 19:42:42,393 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 30 treesize of output 22 [2022-03-03 19:42:42,394 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 26 treesize of output 18 [2022-03-03 19:42:42,420 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:42,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:42:42,590 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:42:42,590 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 63 treesize of output 86 [2022-03-03 19:42:42,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:42,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:42,609 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:42:42,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 76 [2022-03-03 19:42:42,619 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:42:42,619 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 214 treesize of output 198 [2022-03-03 19:42:42,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:42,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:42,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:42,765 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 63 treesize of output 49 [2022-03-03 19:42:42,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:42,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:42,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:42,768 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 49 treesize of output 35 [2022-03-03 19:42:42,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:42,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:42,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:42,828 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:42,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444915629] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:42:42,829 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:42:42,829 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-03-03 19:42:42,829 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624791024] [2022-03-03 19:42:42,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:42:42,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:42:42,829 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:42:42,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:42:42,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:42:42,830 INFO L87 Difference]: Start difference. First operand 10656 states and 38320 transitions. Second operand has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:44,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:42:44,422 INFO L93 Difference]: Finished difference Result 16958 states and 60208 transitions. [2022-03-03 19:42:44,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-03 19:42:44,423 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:42:44,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:42:44,461 INFO L225 Difference]: With dead ends: 16958 [2022-03-03 19:42:44,461 INFO L226 Difference]: Without dead ends: 16880 [2022-03-03 19:42:44,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=409, Invalid=1571, Unknown=0, NotChecked=0, Total=1980 [2022-03-03 19:42:44,462 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 322 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 1139 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:42:44,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 189 Invalid, 1198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1139 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 19:42:44,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16880 states. [2022-03-03 19:42:44,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16880 to 10813. [2022-03-03 19:42:44,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10813 states, 10812 states have (on average 3.5926748057713653) internal successors, (38844), 10812 states have internal predecessors, (38844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:44,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10813 states to 10813 states and 38844 transitions. [2022-03-03 19:42:44,670 INFO L78 Accepts]: Start accepts. Automaton has 10813 states and 38844 transitions. Word has length 30 [2022-03-03 19:42:44,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:42:44,670 INFO L470 AbstractCegarLoop]: Abstraction has 10813 states and 38844 transitions. [2022-03-03 19:42:44,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:44,670 INFO L276 IsEmpty]: Start isEmpty. Operand 10813 states and 38844 transitions. [2022-03-03 19:42:44,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:42:44,686 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:42:44,686 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:42:44,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-03-03 19:42:44,899 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,SelfDestructingSolverStorable35 [2022-03-03 19:42:44,899 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:42:44,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:42:44,900 INFO L85 PathProgramCache]: Analyzing trace with hash 995764895, now seen corresponding path program 29 times [2022-03-03 19:42:44,900 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:42:44,900 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231929738] [2022-03-03 19:42:44,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:42:44,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:42:44,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:42:45,140 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:45,140 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:42:45,140 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231929738] [2022-03-03 19:42:45,140 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231929738] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:42:45,140 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765397177] [2022-03-03 19:42:45,141 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:42:45,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:42:45,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:42:45,142 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:42:45,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-03 19:42:45,173 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 19:42:45,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:42:45,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-03 19:42:45,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:42:45,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-03 19:42:45,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:45,574 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2022-03-03 19:42:45,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:45,687 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 65 treesize of output 49 [2022-03-03 19:42:45,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:45,689 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 42 treesize of output 30 [2022-03-03 19:42:45,720 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 29 treesize of output 21 [2022-03-03 19:42:45,773 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:45,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:42:46,035 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:46,062 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-03 19:42:46,062 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 63 treesize of output 86 [2022-03-03 19:42:46,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:46,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:46,082 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:42:46,082 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 49 treesize of output 76 [2022-03-03 19:42:46,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:46,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:46,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:46,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:46,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:46,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:46,197 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 63 treesize of output 49 [2022-03-03 19:42:46,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:46,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:46,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:46,200 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 49 treesize of output 35 [2022-03-03 19:42:46,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:46,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:46,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:46,299 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:46,300 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765397177] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:42:46,300 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:42:46,300 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 25 [2022-03-03 19:42:46,300 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799749206] [2022-03-03 19:42:46,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:42:46,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:42:46,300 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:42:46,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:42:46,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:42:46,301 INFO L87 Difference]: Start difference. First operand 10813 states and 38844 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:53,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:42:53,021 INFO L93 Difference]: Finished difference Result 20992 states and 73014 transitions. [2022-03-03 19:42:53,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-03-03 19:42:53,021 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:42:53,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:42:53,075 INFO L225 Difference]: With dead ends: 20992 [2022-03-03 19:42:53,076 INFO L226 Difference]: Without dead ends: 20938 [2022-03-03 19:42:53,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4448 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1917, Invalid=10293, Unknown=0, NotChecked=0, Total=12210 [2022-03-03 19:42:53,085 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 462 mSDsluCounter, 846 mSDsCounter, 0 mSdLazyCounter, 2596 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 3055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 2596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 330 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:42:53,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [462 Valid, 424 Invalid, 3055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 2596 Invalid, 0 Unknown, 330 Unchecked, 1.7s Time] [2022-03-03 19:42:53,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20938 states. [2022-03-03 19:42:53,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20938 to 11234. [2022-03-03 19:42:53,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11234 states, 11233 states have (on average 3.589958158995816) internal successors, (40326), 11233 states have internal predecessors, (40326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:53,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11234 states to 11234 states and 40326 transitions. [2022-03-03 19:42:53,355 INFO L78 Accepts]: Start accepts. Automaton has 11234 states and 40326 transitions. Word has length 30 [2022-03-03 19:42:53,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:42:53,355 INFO L470 AbstractCegarLoop]: Abstraction has 11234 states and 40326 transitions. [2022-03-03 19:42:53,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:53,356 INFO L276 IsEmpty]: Start isEmpty. Operand 11234 states and 40326 transitions. [2022-03-03 19:42:53,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:42:53,373 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:42:53,373 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:42:53,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-03 19:42:53,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-03 19:42:53,587 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:42:53,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:42:53,588 INFO L85 PathProgramCache]: Analyzing trace with hash -382774213, now seen corresponding path program 30 times [2022-03-03 19:42:53,588 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:42:53,588 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205179401] [2022-03-03 19:42:53,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:42:53,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:42:53,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:42:53,817 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:53,818 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:42:53,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205179401] [2022-03-03 19:42:53,818 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205179401] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:42:53,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531085481] [2022-03-03 19:42:53,818 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:42:53,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:42:53,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:42:53,819 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:42:53,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-03 19:42:53,849 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 19:42:53,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:42:53,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 19:42:53,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:42:53,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-03 19:42:54,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:54,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 39 [2022-03-03 19:42:54,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:54,070 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 41 treesize of output 29 [2022-03-03 19:42:54,129 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 25 treesize of output 17 [2022-03-03 19:42:54,130 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 20 treesize of output 12 [2022-03-03 19:42:54,151 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:54,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:42:54,303 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:42:54,303 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 63 treesize of output 86 [2022-03-03 19:42:54,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:54,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:54,318 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:42:54,318 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 49 treesize of output 76 [2022-03-03 19:42:54,325 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:42:54,325 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 478 treesize of output 446 [2022-03-03 19:42:54,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:54,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:54,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:54,524 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 63 treesize of output 49 [2022-03-03 19:42:54,550 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:54,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:54,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:54,552 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 49 treesize of output 35 [2022-03-03 19:42:54,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:54,553 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:54,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:54,612 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:54,612 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531085481] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:42:54,612 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:42:54,612 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-03-03 19:42:54,612 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485609671] [2022-03-03 19:42:54,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:42:54,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:42:54,616 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:42:54,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:42:54,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:42:54,616 INFO L87 Difference]: Start difference. First operand 11234 states and 40326 transitions. Second operand has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:56,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:42:56,261 INFO L93 Difference]: Finished difference Result 18303 states and 64746 transitions. [2022-03-03 19:42:56,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-03 19:42:56,265 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:42:56,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:42:56,307 INFO L225 Difference]: With dead ends: 18303 [2022-03-03 19:42:56,307 INFO L226 Difference]: Without dead ends: 18282 [2022-03-03 19:42:56,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=296, Invalid=1866, Unknown=0, NotChecked=0, Total=2162 [2022-03-03 19:42:56,308 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 254 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 1437 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 1486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:42:56,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 256 Invalid, 1486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1437 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-03 19:42:56,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18282 states. [2022-03-03 19:42:56,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18282 to 11276. [2022-03-03 19:42:56,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11276 states, 11275 states have (on average 3.5881152993348113) internal successors, (40456), 11275 states have internal predecessors, (40456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:56,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11276 states to 11276 states and 40456 transitions. [2022-03-03 19:42:56,532 INFO L78 Accepts]: Start accepts. Automaton has 11276 states and 40456 transitions. Word has length 30 [2022-03-03 19:42:56,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:42:56,532 INFO L470 AbstractCegarLoop]: Abstraction has 11276 states and 40456 transitions. [2022-03-03 19:42:56,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:56,533 INFO L276 IsEmpty]: Start isEmpty. Operand 11276 states and 40456 transitions. [2022-03-03 19:42:56,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:42:56,549 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:42:56,549 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:42:56,564 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-03-03 19:42:56,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-03 19:42:56,764 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:42:56,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:42:56,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1803225825, now seen corresponding path program 31 times [2022-03-03 19:42:56,765 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:42:56,765 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152358911] [2022-03-03 19:42:56,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:42:56,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:42:56,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:42:56,959 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:56,960 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:42:56,960 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152358911] [2022-03-03 19:42:56,960 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152358911] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:42:56,960 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520794757] [2022-03-03 19:42:56,960 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:42:56,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:42:56,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:42:56,961 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:42:56,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-03 19:42:56,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:42:56,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 19:42:56,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:42:57,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-03 19:42:57,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:57,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 39 [2022-03-03 19:42:57,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:57,355 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 42 treesize of output 30 [2022-03-03 19:42:57,414 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-03-03 19:42:57,415 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 29 treesize of output 21 [2022-03-03 19:42:57,448 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:57,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:42:57,665 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:42:57,665 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 63 treesize of output 86 [2022-03-03 19:42:57,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:57,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:57,683 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:42:57,684 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 49 treesize of output 76 [2022-03-03 19:42:57,691 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:42:57,692 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 478 treesize of output 446 [2022-03-03 19:42:57,932 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:57,932 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:57,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:57,933 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 63 treesize of output 49 [2022-03-03 19:42:57,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:57,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:57,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:57,937 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 49 treesize of output 35 [2022-03-03 19:42:57,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:57,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:57,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:58,012 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:58,012 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520794757] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:42:58,012 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:42:58,012 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-03-03 19:42:58,012 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781307692] [2022-03-03 19:42:58,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:42:58,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:42:58,012 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:42:58,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:42:58,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:42:58,013 INFO L87 Difference]: Start difference. First operand 11276 states and 40456 transitions. Second operand has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:59,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:42:59,510 INFO L93 Difference]: Finished difference Result 17844 states and 63269 transitions. [2022-03-03 19:42:59,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-03 19:42:59,510 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:42:59,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:42:59,552 INFO L225 Difference]: With dead ends: 17844 [2022-03-03 19:42:59,552 INFO L226 Difference]: Without dead ends: 17793 [2022-03-03 19:42:59,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=318, Invalid=1662, Unknown=0, NotChecked=0, Total=1980 [2022-03-03 19:42:59,553 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 266 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 1258 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 1314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:42:59,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 221 Invalid, 1314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1258 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-03 19:42:59,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17793 states. [2022-03-03 19:42:59,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17793 to 11285. [2022-03-03 19:42:59,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11285 states, 11284 states have (on average 3.588709677419355) internal successors, (40495), 11284 states have internal predecessors, (40495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:59,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11285 states to 11285 states and 40495 transitions. [2022-03-03 19:42:59,777 INFO L78 Accepts]: Start accepts. Automaton has 11285 states and 40495 transitions. Word has length 30 [2022-03-03 19:42:59,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:42:59,777 INFO L470 AbstractCegarLoop]: Abstraction has 11285 states and 40495 transitions. [2022-03-03 19:42:59,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:59,777 INFO L276 IsEmpty]: Start isEmpty. Operand 11285 states and 40495 transitions. [2022-03-03 19:42:59,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:42:59,794 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:42:59,794 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:42:59,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-03 19:43:00,003 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,SelfDestructingSolverStorable38 [2022-03-03 19:43:00,004 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:43:00,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:43:00,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1471923427, now seen corresponding path program 32 times [2022-03-03 19:43:00,004 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:43:00,004 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931196946] [2022-03-03 19:43:00,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:43:00,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:43:00,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:43:00,240 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:00,240 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:43:00,240 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931196946] [2022-03-03 19:43:00,241 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931196946] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:43:00,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022859079] [2022-03-03 19:43:00,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:43:00,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:43:00,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:43:00,242 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:43:00,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-03 19:43:00,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:43:00,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:43:00,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 19:43:00,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:43:00,401 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-03 19:43:00,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:00,523 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 39 [2022-03-03 19:43:00,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:00,676 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 65 treesize of output 49 [2022-03-03 19:43:00,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:00,679 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 34 treesize of output 22 [2022-03-03 19:43:00,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:00,706 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 30 treesize of output 15 [2022-03-03 19:43:00,744 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:00,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:43:01,030 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:43:01,031 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 63 treesize of output 86 [2022-03-03 19:43:01,035 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:01,035 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:01,051 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:43:01,051 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 49 treesize of output 76 [2022-03-03 19:43:01,058 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:43:01,058 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 214 treesize of output 198 [2022-03-03 19:43:01,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:01,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:01,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:01,235 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 64 treesize of output 50 [2022-03-03 19:43:01,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:01,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:01,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:01,238 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 50 treesize of output 36 [2022-03-03 19:43:01,239 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:01,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:01,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:01,301 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:01,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022859079] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:43:01,301 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:43:01,301 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2022-03-03 19:43:01,301 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059008333] [2022-03-03 19:43:01,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:43:01,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:43:01,302 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:43:01,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:43:01,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:43:01,302 INFO L87 Difference]: Start difference. First operand 11285 states and 40495 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:02,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:43:02,610 INFO L93 Difference]: Finished difference Result 18171 states and 64224 transitions. [2022-03-03 19:43:02,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-03 19:43:02,610 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:43:02,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:43:02,653 INFO L225 Difference]: With dead ends: 18171 [2022-03-03 19:43:02,653 INFO L226 Difference]: Without dead ends: 18150 [2022-03-03 19:43:02,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=279, Invalid=1613, Unknown=0, NotChecked=0, Total=1892 [2022-03-03 19:43:02,654 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 295 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 1505 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 1560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:43:02,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 247 Invalid, 1560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1505 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 19:43:02,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18150 states. [2022-03-03 19:43:02,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18150 to 11289. [2022-03-03 19:43:02,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11289 states, 11288 states have (on average 3.5893869596031185) internal successors, (40517), 11288 states have internal predecessors, (40517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:02,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11289 states to 11289 states and 40517 transitions. [2022-03-03 19:43:02,879 INFO L78 Accepts]: Start accepts. Automaton has 11289 states and 40517 transitions. Word has length 30 [2022-03-03 19:43:02,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:43:02,879 INFO L470 AbstractCegarLoop]: Abstraction has 11289 states and 40517 transitions. [2022-03-03 19:43:02,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:02,879 INFO L276 IsEmpty]: Start isEmpty. Operand 11289 states and 40517 transitions. [2022-03-03 19:43:02,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:43:02,896 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:43:02,897 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:43:02,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-03 19:43:03,112 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,SelfDestructingSolverStorable39 [2022-03-03 19:43:03,112 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:43:03,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:43:03,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1713539717, now seen corresponding path program 33 times [2022-03-03 19:43:03,112 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:43:03,112 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803403695] [2022-03-03 19:43:03,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:43:03,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:43:03,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:43:03,351 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:03,352 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:43:03,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803403695] [2022-03-03 19:43:03,352 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803403695] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:43:03,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109295770] [2022-03-03 19:43:03,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:43:03,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:43:03,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:43:03,353 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:43:03,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-03 19:43:03,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:43:03,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:43:03,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 19:43:03,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:43:03,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-03 19:43:03,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:03,754 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 43 treesize of output 31 [2022-03-03 19:43:03,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:03,757 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2022-03-03 19:43:03,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:03,760 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 39 treesize of output 27 [2022-03-03 19:43:03,817 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 22 treesize of output 14 [2022-03-03 19:43:03,840 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:03,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:43:04,086 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:43:04,086 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 63 treesize of output 86 [2022-03-03 19:43:04,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:04,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:04,107 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:43:04,108 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 49 treesize of output 76 [2022-03-03 19:43:04,115 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:43:04,115 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 478 treesize of output 446 [2022-03-03 19:43:04,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:04,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:04,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:04,284 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 63 treesize of output 49 [2022-03-03 19:43:04,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:04,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:04,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:04,287 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 49 treesize of output 35 [2022-03-03 19:43:04,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:04,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:04,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:04,359 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:04,359 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109295770] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:43:04,360 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:43:04,360 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-03-03 19:43:04,360 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810976947] [2022-03-03 19:43:04,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:43:04,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:43:04,360 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:43:04,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:43:04,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:43:04,360 INFO L87 Difference]: Start difference. First operand 11289 states and 40517 transitions. Second operand has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:06,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:43:06,102 INFO L93 Difference]: Finished difference Result 15127 states and 51549 transitions. [2022-03-03 19:43:06,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-03 19:43:06,102 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:43:06,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:43:06,139 INFO L225 Difference]: With dead ends: 15127 [2022-03-03 19:43:06,139 INFO L226 Difference]: Without dead ends: 15091 [2022-03-03 19:43:06,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=348, Invalid=2102, Unknown=0, NotChecked=0, Total=2450 [2022-03-03 19:43:06,140 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 395 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 1483 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 1545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 19:43:06,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [395 Valid, 264 Invalid, 1545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1483 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-03 19:43:06,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15091 states. [2022-03-03 19:43:06,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15091 to 11206. [2022-03-03 19:43:06,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11206 states, 11205 states have (on average 3.5927710843373495) internal successors, (40257), 11205 states have internal predecessors, (40257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:06,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11206 states to 11206 states and 40257 transitions. [2022-03-03 19:43:06,355 INFO L78 Accepts]: Start accepts. Automaton has 11206 states and 40257 transitions. Word has length 30 [2022-03-03 19:43:06,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:43:06,355 INFO L470 AbstractCegarLoop]: Abstraction has 11206 states and 40257 transitions. [2022-03-03 19:43:06,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:06,355 INFO L276 IsEmpty]: Start isEmpty. Operand 11206 states and 40257 transitions. [2022-03-03 19:43:06,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:43:06,372 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:43:06,372 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:43:06,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-03 19:43:06,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:43:06,587 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:43:06,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:43:06,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1448303207, now seen corresponding path program 34 times [2022-03-03 19:43:06,588 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:43:06,588 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450995749] [2022-03-03 19:43:06,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:43:06,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:43:06,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:43:06,810 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:06,810 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:43:06,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450995749] [2022-03-03 19:43:06,810 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450995749] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:43:06,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864540377] [2022-03-03 19:43:06,810 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:43:06,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:43:06,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:43:06,811 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:43:06,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-03 19:43:06,841 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:43:06,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:43:06,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 19:43:06,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:43:06,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-03 19:43:07,188 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 38 treesize of output 30 [2022-03-03 19:43:07,190 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 28 treesize of output 20 [2022-03-03 19:43:07,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-03 19:43:07,232 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 22 treesize of output 14 [2022-03-03 19:43:07,253 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:07,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:43:07,431 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:43:07,432 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 63 treesize of output 86 [2022-03-03 19:43:07,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:07,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:07,450 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:43:07,450 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 49 treesize of output 76 [2022-03-03 19:43:07,456 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:43:07,457 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 478 treesize of output 446 [2022-03-03 19:43:07,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:07,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:07,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:07,715 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 63 treesize of output 49 [2022-03-03 19:43:07,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:07,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:07,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:07,723 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 49 treesize of output 35 [2022-03-03 19:43:07,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:07,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:07,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:07,795 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:07,795 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864540377] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:43:07,795 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:43:07,795 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-03-03 19:43:07,795 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796204906] [2022-03-03 19:43:07,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:43:07,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:43:07,795 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:43:07,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:43:07,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:43:07,796 INFO L87 Difference]: Start difference. First operand 11206 states and 40257 transitions. Second operand has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:09,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:43:09,960 INFO L93 Difference]: Finished difference Result 15682 states and 53273 transitions. [2022-03-03 19:43:09,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-03 19:43:09,961 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:43:09,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:43:10,000 INFO L225 Difference]: With dead ends: 15682 [2022-03-03 19:43:10,001 INFO L226 Difference]: Without dead ends: 15646 [2022-03-03 19:43:10,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=489, Invalid=2703, Unknown=0, NotChecked=0, Total=3192 [2022-03-03 19:43:10,001 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 418 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 1538 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 1607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 19:43:10,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 289 Invalid, 1607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1538 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-03 19:43:10,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15646 states. [2022-03-03 19:43:10,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15646 to 11312. [2022-03-03 19:43:10,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11312 states, 11311 states have (on average 3.5949076120590577) internal successors, (40662), 11311 states have internal predecessors, (40662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:10,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11312 states to 11312 states and 40662 transitions. [2022-03-03 19:43:10,232 INFO L78 Accepts]: Start accepts. Automaton has 11312 states and 40662 transitions. Word has length 30 [2022-03-03 19:43:10,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:43:10,232 INFO L470 AbstractCegarLoop]: Abstraction has 11312 states and 40662 transitions. [2022-03-03 19:43:10,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:10,232 INFO L276 IsEmpty]: Start isEmpty. Operand 11312 states and 40662 transitions. [2022-03-03 19:43:10,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:43:10,249 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:43:10,250 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:43:10,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-03 19:43:10,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:43:10,467 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:43:10,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:43:10,467 INFO L85 PathProgramCache]: Analyzing trace with hash 701800485, now seen corresponding path program 35 times [2022-03-03 19:43:10,467 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:43:10,467 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219140572] [2022-03-03 19:43:10,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:43:10,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:43:10,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:43:10,727 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:10,727 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:43:10,727 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219140572] [2022-03-03 19:43:10,727 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219140572] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:43:10,727 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508188123] [2022-03-03 19:43:10,727 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:43:10,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:43:10,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:43:10,728 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:43:10,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-03 19:43:10,759 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 19:43:10,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:43:10,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-03 19:43:10,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:43:10,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-03 19:43:11,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:11,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2022-03-03 19:43:11,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:11,308 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 52 treesize of output 42 [2022-03-03 19:43:11,384 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 33 treesize of output 25 [2022-03-03 19:43:11,385 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 27 treesize of output 19 [2022-03-03 19:43:11,420 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:11,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:43:11,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:11,637 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-03 19:43:11,637 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 63 treesize of output 86 [2022-03-03 19:43:11,641 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:11,641 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:11,654 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:43:11,655 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 49 treesize of output 76 [2022-03-03 19:43:11,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:11,657 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:11,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:11,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:11,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:11,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:11,765 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 63 treesize of output 49 [2022-03-03 19:43:11,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:11,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:11,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:11,768 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 49 treesize of output 35 [2022-03-03 19:43:11,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:11,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:11,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:11,848 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:11,848 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508188123] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:43:11,848 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:43:11,848 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 25 [2022-03-03 19:43:11,848 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015056079] [2022-03-03 19:43:11,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:43:11,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:43:11,848 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:43:11,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:43:11,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:43:11,849 INFO L87 Difference]: Start difference. First operand 11312 states and 40662 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:17,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:43:17,823 INFO L93 Difference]: Finished difference Result 21377 states and 74506 transitions. [2022-03-03 19:43:17,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-03-03 19:43:17,823 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 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 30 [2022-03-03 19:43:17,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:43:17,871 INFO L225 Difference]: With dead ends: 21377 [2022-03-03 19:43:17,871 INFO L226 Difference]: Without dead ends: 21326 [2022-03-03 19:43:17,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3772 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1660, Invalid=8642, Unknown=0, NotChecked=0, Total=10302 [2022-03-03 19:43:17,872 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 534 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 2905 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 3025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 2905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:43:17,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [534 Valid, 460 Invalid, 3025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 2905 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-03 19:43:17,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21326 states. [2022-03-03 19:43:18,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21326 to 11846. [2022-03-03 19:43:18,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11846 states, 11845 states have (on average 3.599409033347404) internal successors, (42635), 11845 states have internal predecessors, (42635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:18,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11846 states to 11846 states and 42635 transitions. [2022-03-03 19:43:18,127 INFO L78 Accepts]: Start accepts. Automaton has 11846 states and 42635 transitions. Word has length 30 [2022-03-03 19:43:18,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:43:18,127 INFO L470 AbstractCegarLoop]: Abstraction has 11846 states and 42635 transitions. [2022-03-03 19:43:18,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:18,127 INFO L276 IsEmpty]: Start isEmpty. Operand 11846 states and 42635 transitions. [2022-03-03 19:43:18,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:43:18,145 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:43:18,145 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:43:18,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-03 19:43:18,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:43:18,361 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:43:18,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:43:18,361 INFO L85 PathProgramCache]: Analyzing trace with hash -416994807, now seen corresponding path program 36 times [2022-03-03 19:43:18,361 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:43:18,361 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838613993] [2022-03-03 19:43:18,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:43:18,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:43:18,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:43:18,567 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:18,567 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:43:18,567 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838613993] [2022-03-03 19:43:18,567 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838613993] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:43:18,567 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27273123] [2022-03-03 19:43:18,567 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:43:18,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:43:18,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:43:18,569 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:43:18,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-03 19:43:18,601 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 19:43:18,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:43:18,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 19:43:18,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:43:18,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-03 19:43:18,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:18,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:18,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 38 [2022-03-03 19:43:18,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:18,928 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 107 treesize of output 65 [2022-03-03 19:43:18,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:18,931 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 94 treesize of output 52 [2022-03-03 19:43:18,953 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 25 treesize of output 17 [2022-03-03 19:43:18,985 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:18,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:43:19,172 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:43:19,172 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 63 treesize of output 86 [2022-03-03 19:43:19,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:19,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:19,190 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:43:19,190 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 49 treesize of output 76 [2022-03-03 19:43:19,196 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:43:19,196 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 214 treesize of output 198 [2022-03-03 19:43:19,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:19,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:19,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:19,351 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 64 treesize of output 50 [2022-03-03 19:43:19,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:19,353 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:19,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:19,353 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 50 treesize of output 36 [2022-03-03 19:43:19,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:19,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:19,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:19,417 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:19,417 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27273123] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:43:19,417 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:43:19,417 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2022-03-03 19:43:19,417 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781411212] [2022-03-03 19:43:19,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:43:19,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:43:19,417 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:43:19,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:43:19,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:43:19,418 INFO L87 Difference]: Start difference. First operand 11846 states and 42635 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:21,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:43:21,353 INFO L93 Difference]: Finished difference Result 18406 states and 65255 transitions. [2022-03-03 19:43:21,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-03 19:43:21,354 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:43:21,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:43:21,399 INFO L225 Difference]: With dead ends: 18406 [2022-03-03 19:43:21,399 INFO L226 Difference]: Without dead ends: 18352 [2022-03-03 19:43:21,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=372, Invalid=1608, Unknown=0, NotChecked=0, Total=1980 [2022-03-03 19:43:21,399 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 359 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 1470 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 1536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 19:43:21,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 208 Invalid, 1536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1470 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-03 19:43:21,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18352 states. [2022-03-03 19:43:21,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18352 to 11938. [2022-03-03 19:43:21,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11938 states, 11937 states have (on average 3.600150791656195) internal successors, (42975), 11937 states have internal predecessors, (42975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:21,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11938 states to 11938 states and 42975 transitions. [2022-03-03 19:43:21,634 INFO L78 Accepts]: Start accepts. Automaton has 11938 states and 42975 transitions. Word has length 30 [2022-03-03 19:43:21,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:43:21,634 INFO L470 AbstractCegarLoop]: Abstraction has 11938 states and 42975 transitions. [2022-03-03 19:43:21,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:21,634 INFO L276 IsEmpty]: Start isEmpty. Operand 11938 states and 42975 transitions. [2022-03-03 19:43:21,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:43:21,654 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:43:21,654 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:43:21,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-03 19:43:21,867 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,SelfDestructingSolverStorable43 [2022-03-03 19:43:21,867 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:43:21,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:43:21,868 INFO L85 PathProgramCache]: Analyzing trace with hash -22684839, now seen corresponding path program 37 times [2022-03-03 19:43:21,868 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:43:21,868 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882362045] [2022-03-03 19:43:21,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:43:21,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:43:21,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:43:22,088 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:22,088 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:43:22,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882362045] [2022-03-03 19:43:22,088 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882362045] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:43:22,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708450013] [2022-03-03 19:43:22,088 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:43:22,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:43:22,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:43:22,089 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:43:22,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-03 19:43:22,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:43:22,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 19:43:22,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:43:22,241 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-03 19:43:22,489 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 38 treesize of output 30 [2022-03-03 19:43:22,491 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 30 treesize of output 22 [2022-03-03 19:43:22,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:22,493 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-03-03 19:43:22,539 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 12 treesize of output 8 [2022-03-03 19:43:22,562 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:22,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:43:22,762 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:43:22,762 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 63 treesize of output 86 [2022-03-03 19:43:22,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:22,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:22,783 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:43:22,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 76 [2022-03-03 19:43:22,791 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:43:22,791 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 478 treesize of output 446 [2022-03-03 19:43:23,011 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:23,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:23,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:23,013 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 63 treesize of output 49 [2022-03-03 19:43:23,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:23,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:23,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:23,016 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 49 treesize of output 35 [2022-03-03 19:43:23,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:23,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:23,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:23,091 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:23,091 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708450013] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:43:23,091 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:43:23,091 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-03-03 19:43:23,091 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143687357] [2022-03-03 19:43:23,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:43:23,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:43:23,092 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:43:23,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:43:23,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:43:23,092 INFO L87 Difference]: Start difference. First operand 11938 states and 42975 transitions. Second operand has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:26,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:43:26,529 INFO L93 Difference]: Finished difference Result 22417 states and 74446 transitions. [2022-03-03 19:43:26,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-03 19:43:26,529 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:43:26,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:43:26,584 INFO L225 Difference]: With dead ends: 22417 [2022-03-03 19:43:26,584 INFO L226 Difference]: Without dead ends: 22288 [2022-03-03 19:43:26,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1590 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=747, Invalid=4509, Unknown=0, NotChecked=0, Total=5256 [2022-03-03 19:43:26,585 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 515 mSDsluCounter, 1243 mSDsCounter, 0 mSdLazyCounter, 3065 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 3133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 3065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:43:26,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [515 Valid, 682 Invalid, 3133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 3065 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-03 19:43:26,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22288 states. [2022-03-03 19:43:26,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22288 to 12527. [2022-03-03 19:43:26,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12527 states, 12526 states have (on average 3.6147213795305766) internal successors, (45278), 12526 states have internal predecessors, (45278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:26,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12527 states to 12527 states and 45278 transitions. [2022-03-03 19:43:26,951 INFO L78 Accepts]: Start accepts. Automaton has 12527 states and 45278 transitions. Word has length 30 [2022-03-03 19:43:26,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:43:26,952 INFO L470 AbstractCegarLoop]: Abstraction has 12527 states and 45278 transitions. [2022-03-03 19:43:26,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:26,952 INFO L276 IsEmpty]: Start isEmpty. Operand 12527 states and 45278 transitions. [2022-03-03 19:43:26,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:43:26,970 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:43:26,970 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:43:26,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-03-03 19:43:27,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-03-03 19:43:27,185 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:43:27,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:43:27,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1697328153, now seen corresponding path program 38 times [2022-03-03 19:43:27,186 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:43:27,186 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607906653] [2022-03-03 19:43:27,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:43:27,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:43:27,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:43:27,425 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:27,425 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:43:27,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607906653] [2022-03-03 19:43:27,425 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607906653] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:43:27,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785187265] [2022-03-03 19:43:27,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:43:27,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:43:27,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:43:27,426 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:43:27,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-03 19:43:27,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:43:27,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:43:27,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-03 19:43:27,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:43:27,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-03 19:43:27,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:27,750 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 42 treesize of output 30 [2022-03-03 19:43:27,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:27,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 28 [2022-03-03 19:43:27,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:27,755 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2022-03-03 19:43:27,835 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 22 treesize of output 14 [2022-03-03 19:43:27,870 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:27,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:43:28,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:28,164 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-03 19:43:28,164 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 79 treesize of output 98 [2022-03-03 19:43:28,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:28,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:28,183 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:43:28,183 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 61 treesize of output 84 [2022-03-03 19:43:28,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:28,190 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 1014 treesize of output 966 [2022-03-03 19:43:28,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:28,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:28,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:28,351 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 78 treesize of output 60 [2022-03-03 19:43:28,353 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:28,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:28,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:28,354 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 60 treesize of output 42 [2022-03-03 19:43:28,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:28,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:28,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:28,437 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:28,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785187265] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:43:28,437 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:43:28,437 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 27 [2022-03-03 19:43:28,437 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968123758] [2022-03-03 19:43:28,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:43:28,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 19:43:28,438 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:43:28,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 19:43:28,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:43:28,438 INFO L87 Difference]: Start difference. First operand 12527 states and 45278 transitions. Second operand has 28 states, 28 states have (on average 2.9285714285714284) internal successors, (82), 27 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:36,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:43:36,716 INFO L93 Difference]: Finished difference Result 23372 states and 81645 transitions. [2022-03-03 19:43:36,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-03-03 19:43:36,717 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.9285714285714284) internal successors, (82), 27 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:43:36,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:43:36,772 INFO L225 Difference]: With dead ends: 23372 [2022-03-03 19:43:36,773 INFO L226 Difference]: Without dead ends: 23302 [2022-03-03 19:43:36,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3353 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=1788, Invalid=8718, Unknown=0, NotChecked=0, Total=10506 [2022-03-03 19:43:36,773 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 670 mSDsluCounter, 1158 mSDsCounter, 0 mSdLazyCounter, 3720 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 670 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 3856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 3720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:43:36,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [670 Valid, 468 Invalid, 3856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 3720 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-03 19:43:36,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23302 states. [2022-03-03 19:43:37,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23302 to 13527. [2022-03-03 19:43:37,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13527 states, 13526 states have (on average 3.618142836019518) internal successors, (48939), 13526 states have internal predecessors, (48939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:37,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13527 states to 13527 states and 48939 transitions. [2022-03-03 19:43:37,061 INFO L78 Accepts]: Start accepts. Automaton has 13527 states and 48939 transitions. Word has length 30 [2022-03-03 19:43:37,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:43:37,061 INFO L470 AbstractCegarLoop]: Abstraction has 13527 states and 48939 transitions. [2022-03-03 19:43:37,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.9285714285714284) internal successors, (82), 27 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:37,062 INFO L276 IsEmpty]: Start isEmpty. Operand 13527 states and 48939 transitions. [2022-03-03 19:43:37,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:43:37,084 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:43:37,085 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:43:37,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-03 19:43:37,286 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,SelfDestructingSolverStorable45 [2022-03-03 19:43:37,286 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:43:37,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:43:37,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1027608453, now seen corresponding path program 39 times [2022-03-03 19:43:37,286 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:43:37,286 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080633773] [2022-03-03 19:43:37,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:43:37,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:43:37,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:43:37,459 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:37,459 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:43:37,459 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080633773] [2022-03-03 19:43:37,459 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080633773] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:43:37,459 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284648586] [2022-03-03 19:43:37,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:43:37,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:43:37,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:43:37,461 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:43:37,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-03 19:43:37,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-03 19:43:37,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:43:37,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-03 19:43:37,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:43:37,603 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-03 19:43:37,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:37,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-03-03 19:43:37,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:37,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:37,964 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 42 treesize of output 30 [2022-03-03 19:43:38,014 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 30 treesize of output 22 [2022-03-03 19:43:38,016 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 [2022-03-03 19:43:38,048 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:38,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:43:38,418 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:38,451 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-03 19:43:38,451 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 153 treesize of output 154 [2022-03-03 19:43:38,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:38,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:38,474 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:43:38,474 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 117 treesize of output 122 [2022-03-03 19:43:38,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:38,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:38,482 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 413 treesize of output 389 [2022-03-03 19:43:38,878 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:38,878 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284648586] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:43:38,878 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:43:38,879 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-03-03 19:43:38,879 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421004226] [2022-03-03 19:43:38,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:43:38,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:43:38,879 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:43:38,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:43:38,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:43:38,879 INFO L87 Difference]: Start difference. First operand 13527 states and 48939 transitions. Second operand has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:39,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:43:39,686 INFO L93 Difference]: Finished difference Result 15110 states and 53669 transitions. [2022-03-03 19:43:39,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-03 19:43:39,686 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:43:39,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:43:39,729 INFO L225 Difference]: With dead ends: 15110 [2022-03-03 19:43:39,729 INFO L226 Difference]: Without dead ends: 15052 [2022-03-03 19:43:39,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=159, Invalid=833, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:43:39,729 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 157 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 1027 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 1545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 503 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:43:39,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 283 Invalid, 1545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1027 Invalid, 0 Unknown, 503 Unchecked, 0.5s Time] [2022-03-03 19:43:39,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15052 states. [2022-03-03 19:43:39,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15052 to 13566. [2022-03-03 19:43:39,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13566 states, 13565 states have (on average 3.6155547364541096) internal successors, (49045), 13565 states have internal predecessors, (49045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:39,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13566 states to 13566 states and 49045 transitions. [2022-03-03 19:43:39,973 INFO L78 Accepts]: Start accepts. Automaton has 13566 states and 49045 transitions. Word has length 30 [2022-03-03 19:43:39,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:43:39,973 INFO L470 AbstractCegarLoop]: Abstraction has 13566 states and 49045 transitions. [2022-03-03 19:43:39,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:39,973 INFO L276 IsEmpty]: Start isEmpty. Operand 13566 states and 49045 transitions. [2022-03-03 19:43:39,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:43:39,996 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:43:39,996 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:43:40,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-03 19:43:40,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-03-03 19:43:40,199 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:43:40,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:43:40,199 INFO L85 PathProgramCache]: Analyzing trace with hash -2146403745, now seen corresponding path program 40 times [2022-03-03 19:43:40,199 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:43:40,199 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975254853] [2022-03-03 19:43:40,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:43:40,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:43:40,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:43:40,407 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:40,408 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:43:40,408 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975254853] [2022-03-03 19:43:40,408 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975254853] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:43:40,408 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652834623] [2022-03-03 19:43:40,408 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:43:40,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:43:40,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:43:40,409 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:43:40,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-03 19:43:40,458 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:43:40,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:43:40,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 19:43:40,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:43:40,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-03 19:43:40,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:40,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-03-03 19:43:40,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:40,853 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 45 treesize of output 33 [2022-03-03 19:43:40,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:40,856 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 44 treesize of output 32 [2022-03-03 19:43:40,880 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 25 treesize of output 17 [2022-03-03 19:43:40,918 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:40,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:43:41,108 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:43:41,109 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 78 treesize of output 97 [2022-03-03 19:43:41,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:41,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:41,130 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:43:41,131 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 60 treesize of output 83 [2022-03-03 19:43:41,139 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:43:41,139 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 1962 treesize of output 1866 [2022-03-03 19:43:41,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:41,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:41,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:41,791 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 78 treesize of output 60 [2022-03-03 19:43:41,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:41,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:41,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:41,795 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 60 treesize of output 42 [2022-03-03 19:43:41,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:41,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:41,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:41,868 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:41,868 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652834623] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:43:41,868 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:43:41,868 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-03-03 19:43:41,868 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2900850] [2022-03-03 19:43:41,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:43:41,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:43:41,869 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:43:41,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:43:41,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:43:41,869 INFO L87 Difference]: Start difference. First operand 13566 states and 49045 transitions. Second operand has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:42,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:43:42,393 INFO L93 Difference]: Finished difference Result 14686 states and 52491 transitions. [2022-03-03 19:43:42,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:43:42,393 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:43:42,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:43:42,428 INFO L225 Difference]: With dead ends: 14686 [2022-03-03 19:43:42,428 INFO L226 Difference]: Without dead ends: 14661 [2022-03-03 19:43:42,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:43:42,429 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 164 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:43:42,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 192 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:43:42,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14661 states. [2022-03-03 19:43:42,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14661 to 13684. [2022-03-03 19:43:42,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13684 states, 13683 states have (on average 3.6158737119052837) internal successors, (49476), 13683 states have internal predecessors, (49476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:42,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13684 states to 13684 states and 49476 transitions. [2022-03-03 19:43:42,657 INFO L78 Accepts]: Start accepts. Automaton has 13684 states and 49476 transitions. Word has length 30 [2022-03-03 19:43:42,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:43:42,657 INFO L470 AbstractCegarLoop]: Abstraction has 13684 states and 49476 transitions. [2022-03-03 19:43:42,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:42,657 INFO L276 IsEmpty]: Start isEmpty. Operand 13684 states and 49476 transitions. [2022-03-03 19:43:42,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:43:42,680 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:43:42,680 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:43:42,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-03 19:43:42,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:43:42,896 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:43:42,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:43:42,897 INFO L85 PathProgramCache]: Analyzing trace with hash 198851673, now seen corresponding path program 41 times [2022-03-03 19:43:42,897 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:43:42,897 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53605106] [2022-03-03 19:43:42,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:43:42,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:43:42,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:43:43,086 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:43,087 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:43:43,087 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53605106] [2022-03-03 19:43:43,087 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53605106] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:43:43,087 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628190699] [2022-03-03 19:43:43,087 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:43:43,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:43:43,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:43:43,091 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:43:43,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-03 19:43:43,125 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 19:43:43,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:43:43,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-03 19:43:43,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:43:43,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-03 19:43:43,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:43,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-03-03 19:43:43,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:43,565 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 44 treesize of output 32 [2022-03-03 19:43:43,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:43,567 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 40 treesize of output 28 [2022-03-03 19:43:43,630 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 [2022-03-03 19:43:43,676 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:43,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:43:44,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:44,045 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-03 19:43:44,045 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 79 treesize of output 98 [2022-03-03 19:43:44,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:44,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:44,066 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:43:44,067 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 61 treesize of output 84 [2022-03-03 19:43:44,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:44,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:44,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:44,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:44,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:44,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:44,192 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 78 treesize of output 60 [2022-03-03 19:43:44,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:44,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:44,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:44,196 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 60 treesize of output 42 [2022-03-03 19:43:44,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:44,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:44,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:44,300 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:44,300 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628190699] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:43:44,300 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:43:44,300 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 27 [2022-03-03 19:43:44,300 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268935528] [2022-03-03 19:43:44,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:43:44,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 19:43:44,301 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:43:44,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 19:43:44,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:43:44,301 INFO L87 Difference]: Start difference. First operand 13684 states and 49476 transitions. Second operand has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:48,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:43:48,490 INFO L93 Difference]: Finished difference Result 24766 states and 86992 transitions. [2022-03-03 19:43:48,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-03 19:43:48,490 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:43:48,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:43:48,576 INFO L225 Difference]: With dead ends: 24766 [2022-03-03 19:43:48,576 INFO L226 Difference]: Without dead ends: 24705 [2022-03-03 19:43:48,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3121 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1200, Invalid=8306, Unknown=0, NotChecked=0, Total=9506 [2022-03-03 19:43:48,576 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 474 mSDsluCounter, 876 mSDsCounter, 0 mSdLazyCounter, 2899 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 3345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 2899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 377 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:43:48,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [474 Valid, 411 Invalid, 3345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 2899 Invalid, 0 Unknown, 377 Unchecked, 1.5s Time] [2022-03-03 19:43:48,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24705 states. [2022-03-03 19:43:48,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24705 to 13889. [2022-03-03 19:43:48,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13889 states, 13888 states have (on average 3.6162154377880182) internal successors, (50222), 13888 states have internal predecessors, (50222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:48,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13889 states to 13889 states and 50222 transitions. [2022-03-03 19:43:48,913 INFO L78 Accepts]: Start accepts. Automaton has 13889 states and 50222 transitions. Word has length 30 [2022-03-03 19:43:48,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:43:48,913 INFO L470 AbstractCegarLoop]: Abstraction has 13889 states and 50222 transitions. [2022-03-03 19:43:48,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:48,913 INFO L276 IsEmpty]: Start isEmpty. Operand 13889 states and 50222 transitions. [2022-03-03 19:43:48,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:43:48,936 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:43:48,936 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:43:48,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-03 19:43:49,151 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,SelfDestructingSolverStorable48 [2022-03-03 19:43:49,151 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:43:49,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:43:49,152 INFO L85 PathProgramCache]: Analyzing trace with hash 2114563583, now seen corresponding path program 42 times [2022-03-03 19:43:49,152 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:43:49,152 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358634379] [2022-03-03 19:43:49,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:43:49,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:43:49,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:43:49,355 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:49,355 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:43:49,355 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358634379] [2022-03-03 19:43:49,355 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358634379] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:43:49,355 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928340743] [2022-03-03 19:43:49,355 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:43:49,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:43:49,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:43:49,356 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:43:49,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-03 19:43:49,390 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 19:43:49,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:43:49,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 19:43:49,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:43:49,501 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-03 19:43:49,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:49,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2022-03-03 19:43:49,774 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 32 treesize of output 24 [2022-03-03 19:43:49,799 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 30 treesize of output 22 [2022-03-03 19:43:49,801 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 [2022-03-03 19:43:49,839 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:49,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:43:50,026 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:43:50,027 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 63 treesize of output 86 [2022-03-03 19:43:50,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:50,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:50,048 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:43:50,049 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 49 treesize of output 76 [2022-03-03 19:43:50,056 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:43:50,056 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 234 treesize of output 218 [2022-03-03 19:43:50,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:50,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:50,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:50,265 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 63 treesize of output 49 [2022-03-03 19:43:50,267 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:50,267 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:50,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:50,268 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 49 treesize of output 35 [2022-03-03 19:43:50,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:50,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:50,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:50,336 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:50,336 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928340743] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:43:50,336 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:43:50,336 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-03 19:43:50,336 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776772790] [2022-03-03 19:43:50,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:43:50,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 19:43:50,337 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:43:50,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 19:43:50,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:43:50,337 INFO L87 Difference]: Start difference. First operand 13889 states and 50222 transitions. Second operand has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:50,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:43:50,966 INFO L93 Difference]: Finished difference Result 15095 states and 53867 transitions. [2022-03-03 19:43:50,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:43:50,967 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:43:50,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:43:51,004 INFO L225 Difference]: With dead ends: 15095 [2022-03-03 19:43:51,004 INFO L226 Difference]: Without dead ends: 15056 [2022-03-03 19:43:51,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:43:51,005 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 143 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:43:51,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 186 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:43:51,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15056 states. [2022-03-03 19:43:51,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15056 to 13856. [2022-03-03 19:43:51,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13856 states, 13855 states have (on average 3.6176109707686757) internal successors, (50122), 13855 states have internal predecessors, (50122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:51,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13856 states to 13856 states and 50122 transitions. [2022-03-03 19:43:51,258 INFO L78 Accepts]: Start accepts. Automaton has 13856 states and 50122 transitions. Word has length 30 [2022-03-03 19:43:51,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:43:51,258 INFO L470 AbstractCegarLoop]: Abstraction has 13856 states and 50122 transitions. [2022-03-03 19:43:51,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:51,258 INFO L276 IsEmpty]: Start isEmpty. Operand 13856 states and 50122 transitions. [2022-03-03 19:43:51,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:43:51,284 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:43:51,284 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:43:51,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-03 19:43:51,500 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,SelfDestructingSolverStorable49 [2022-03-03 19:43:51,500 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:43:51,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:43:51,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1529864005, now seen corresponding path program 43 times [2022-03-03 19:43:51,501 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:43:51,501 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152898073] [2022-03-03 19:43:51,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:43:51,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:43:51,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:43:51,671 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:51,672 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:43:51,672 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152898073] [2022-03-03 19:43:51,672 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152898073] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:43:51,672 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425437922] [2022-03-03 19:43:51,672 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:43:51,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:43:51,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:43:51,673 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:43:51,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-03 19:43:51,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:43:51,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 19:43:51,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:43:51,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-03 19:43:51,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:51,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-03-03 19:43:52,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:52,032 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 44 treesize of output 32 [2022-03-03 19:43:52,124 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 30 treesize of output 22 [2022-03-03 19:43:52,126 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 27 treesize of output 19 [2022-03-03 19:43:52,159 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:52,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:43:52,372 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:43:52,372 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 78 treesize of output 97 [2022-03-03 19:43:52,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:52,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:52,393 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:43:52,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 60 treesize of output 83 [2022-03-03 19:43:52,401 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:43:52,401 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 982 treesize of output 934 [2022-03-03 19:43:52,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:52,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:52,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:52,758 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 78 treesize of output 60 [2022-03-03 19:43:52,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:52,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:52,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:52,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2022-03-03 19:43:52,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:52,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:52,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:52,838 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:52,838 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425437922] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:43:52,839 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:43:52,839 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-03-03 19:43:52,839 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463382210] [2022-03-03 19:43:52,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:43:52,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:43:52,839 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:43:52,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:43:52,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:43:52,839 INFO L87 Difference]: Start difference. First operand 13856 states and 50122 transitions. Second operand has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:53,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:43:53,395 INFO L93 Difference]: Finished difference Result 15000 states and 53772 transitions. [2022-03-03 19:43:53,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 19:43:53,396 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:43:53,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:43:53,429 INFO L225 Difference]: With dead ends: 15000 [2022-03-03 19:43:53,429 INFO L226 Difference]: Without dead ends: 14967 [2022-03-03 19:43:53,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:43:53,429 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 100 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:43:53,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 302 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:43:53,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14967 states. [2022-03-03 19:43:53,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14967 to 13886. [2022-03-03 19:43:53,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13886 states, 13885 states have (on average 3.616996759092546) internal successors, (50222), 13885 states have internal predecessors, (50222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:53,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13886 states to 13886 states and 50222 transitions. [2022-03-03 19:43:53,662 INFO L78 Accepts]: Start accepts. Automaton has 13886 states and 50222 transitions. Word has length 30 [2022-03-03 19:43:53,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:43:53,663 INFO L470 AbstractCegarLoop]: Abstraction has 13886 states and 50222 transitions. [2022-03-03 19:43:53,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:53,663 INFO L276 IsEmpty]: Start isEmpty. Operand 13886 states and 50222 transitions. [2022-03-03 19:43:53,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:43:53,687 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:43:53,687 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:43:53,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-03 19:43:53,902 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,SelfDestructingSolverStorable50 [2022-03-03 19:43:53,903 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:43:53,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:43:53,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1344651679, now seen corresponding path program 44 times [2022-03-03 19:43:53,903 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:43:53,903 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855726911] [2022-03-03 19:43:53,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:43:53,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:43:53,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:43:54,082 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:54,083 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:43:54,083 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855726911] [2022-03-03 19:43:54,083 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855726911] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:43:54,083 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675256997] [2022-03-03 19:43:54,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:43:54,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:43:54,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:43:54,084 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:43:54,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-03 19:43:54,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:43:54,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:43:54,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 19:43:54,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:43:54,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-03 19:43:54,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:54,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-03-03 19:43:54,469 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 34 treesize of output 26 [2022-03-03 19:43:54,520 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 32 treesize of output 24 [2022-03-03 19:43:54,522 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 26 treesize of output 18 [2022-03-03 19:43:54,553 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:54,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:43:54,739 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:43:54,739 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 78 treesize of output 97 [2022-03-03 19:43:54,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:54,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:54,760 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:43:54,760 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 60 treesize of output 83 [2022-03-03 19:43:54,767 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:43:54,767 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 452 treesize of output 428 [2022-03-03 19:43:55,021 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:55,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:55,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:55,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 60 [2022-03-03 19:43:55,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:55,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:55,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:55,026 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 60 treesize of output 42 [2022-03-03 19:43:55,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:55,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:55,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:55,102 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:55,103 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675256997] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:43:55,103 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:43:55,103 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-03-03 19:43:55,103 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033637515] [2022-03-03 19:43:55,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:43:55,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:43:55,103 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:43:55,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:43:55,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:43:55,104 INFO L87 Difference]: Start difference. First operand 13886 states and 50222 transitions. Second operand has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:55,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:43:55,547 INFO L93 Difference]: Finished difference Result 14845 states and 53246 transitions. [2022-03-03 19:43:55,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 19:43:55,547 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:43:55,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:43:55,582 INFO L225 Difference]: With dead ends: 14845 [2022-03-03 19:43:55,583 INFO L226 Difference]: Without dead ends: 14782 [2022-03-03 19:43:55,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:43:55,583 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 104 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:43:55,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 225 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:43:55,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14782 states. [2022-03-03 19:43:55,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14782 to 13895. [2022-03-03 19:43:55,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13895 states, 13894 states have (on average 3.617244853893767) internal successors, (50258), 13894 states have internal predecessors, (50258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:55,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13895 states to 13895 states and 50258 transitions. [2022-03-03 19:43:55,857 INFO L78 Accepts]: Start accepts. Automaton has 13895 states and 50258 transitions. Word has length 30 [2022-03-03 19:43:55,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:43:55,857 INFO L470 AbstractCegarLoop]: Abstraction has 13895 states and 50258 transitions. [2022-03-03 19:43:55,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:55,857 INFO L276 IsEmpty]: Start isEmpty. Operand 13895 states and 50258 transitions. [2022-03-03 19:43:55,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:43:55,880 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:43:55,880 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:43:55,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-03 19:43:56,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:43:56,095 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:43:56,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:43:56,096 INFO L85 PathProgramCache]: Analyzing trace with hash 324833635, now seen corresponding path program 45 times [2022-03-03 19:43:56,096 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:43:56,096 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126602531] [2022-03-03 19:43:56,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:43:56,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:43:56,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:43:56,274 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:56,274 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:43:56,274 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126602531] [2022-03-03 19:43:56,274 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126602531] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:43:56,274 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218787150] [2022-03-03 19:43:56,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:43:56,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:43:56,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:43:56,275 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:43:56,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-03 19:43:56,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-03 19:43:56,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:43:56,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-03 19:43:56,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:43:56,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-03 19:43:56,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:56,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-03-03 19:43:56,676 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 32 treesize of output 24 [2022-03-03 19:43:56,678 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 31 treesize of output 23 [2022-03-03 19:43:56,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:56,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:56,705 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 [2022-03-03 19:43:56,735 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:56,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:43:57,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:57,046 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-03 19:43:57,046 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 153 treesize of output 154 [2022-03-03 19:43:57,051 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:57,051 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:57,069 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:43:57,069 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 117 treesize of output 122 [2022-03-03 19:43:57,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:57,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:57,079 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 805 treesize of output 757 [2022-03-03 19:43:57,871 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:57,871 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218787150] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:43:57,871 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:43:57,871 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-03-03 19:43:57,872 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931334544] [2022-03-03 19:43:57,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:43:57,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:43:57,872 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:43:57,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:43:57,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:43:57,872 INFO L87 Difference]: Start difference. First operand 13895 states and 50258 transitions. Second operand has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 21 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:58,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:43:58,727 INFO L93 Difference]: Finished difference Result 16534 states and 58806 transitions. [2022-03-03 19:43:58,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-03 19:43:58,728 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 21 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 30 [2022-03-03 19:43:58,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:43:58,766 INFO L225 Difference]: With dead ends: 16534 [2022-03-03 19:43:58,766 INFO L226 Difference]: Without dead ends: 16501 [2022-03-03 19:43:58,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:43:58,766 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 154 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 874 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 264 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:43:58,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 327 Invalid, 1159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 874 Invalid, 0 Unknown, 264 Unchecked, 0.5s Time] [2022-03-03 19:43:58,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16501 states. [2022-03-03 19:43:58,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16501 to 14057. [2022-03-03 19:43:58,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14057 states, 14056 states have (on average 3.6129055207740466) internal successors, (50783), 14056 states have internal predecessors, (50783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:59,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14057 states to 14057 states and 50783 transitions. [2022-03-03 19:43:59,010 INFO L78 Accepts]: Start accepts. Automaton has 14057 states and 50783 transitions. Word has length 30 [2022-03-03 19:43:59,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:43:59,010 INFO L470 AbstractCegarLoop]: Abstraction has 14057 states and 50783 transitions. [2022-03-03 19:43:59,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 21 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:59,011 INFO L276 IsEmpty]: Start isEmpty. Operand 14057 states and 50783 transitions. [2022-03-03 19:43:59,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:43:59,034 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:43:59,034 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:43:59,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-03 19:43:59,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:43:59,247 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:43:59,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:43:59,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1748496823, now seen corresponding path program 46 times [2022-03-03 19:43:59,248 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:43:59,248 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603849878] [2022-03-03 19:43:59,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:43:59,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:43:59,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:43:59,406 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:59,406 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:43:59,406 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603849878] [2022-03-03 19:43:59,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603849878] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:43:59,406 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749469305] [2022-03-03 19:43:59,406 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:43:59,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:43:59,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:43:59,407 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:43:59,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-03 19:43:59,451 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:43:59,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:43:59,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 19:43:59,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:43:59,571 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-03 19:43:59,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:59,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-03-03 19:43:59,829 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 32 treesize of output 24 [2022-03-03 19:43:59,831 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 27 treesize of output 19 [2022-03-03 19:43:59,874 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 22 treesize of output 14 [2022-03-03 19:43:59,897 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:59,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:44:00,086 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:44:00,086 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 78 treesize of output 97 [2022-03-03 19:44:00,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:00,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:00,108 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:44:00,108 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 60 treesize of output 83 [2022-03-03 19:44:00,116 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:44:00,117 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 978 treesize of output 930 [2022-03-03 19:44:00,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:00,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:00,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:00,482 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 78 treesize of output 60 [2022-03-03 19:44:00,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:00,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:00,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:00,485 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 60 treesize of output 42 [2022-03-03 19:44:00,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:00,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:00,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:00,559 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:00,559 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749469305] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:44:00,559 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:44:00,559 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-03-03 19:44:00,559 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090026853] [2022-03-03 19:44:00,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:44:00,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:44:00,560 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:44:00,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:44:00,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:44:00,560 INFO L87 Difference]: Start difference. First operand 14057 states and 50783 transitions. Second operand has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:01,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:44:01,103 INFO L93 Difference]: Finished difference Result 14932 states and 53497 transitions. [2022-03-03 19:44:01,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 19:44:01,103 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:44:01,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:44:01,138 INFO L225 Difference]: With dead ends: 14932 [2022-03-03 19:44:01,139 INFO L226 Difference]: Without dead ends: 14907 [2022-03-03 19:44:01,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:44:01,139 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 71 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:44:01,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 284 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 903 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:44:01,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14907 states. [2022-03-03 19:44:01,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14907 to 13958. [2022-03-03 19:44:01,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13958 states, 13957 states have (on average 3.6155334240882713) internal successors, (50462), 13957 states have internal predecessors, (50462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:01,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13958 states to 13958 states and 50462 transitions. [2022-03-03 19:44:01,377 INFO L78 Accepts]: Start accepts. Automaton has 13958 states and 50462 transitions. Word has length 30 [2022-03-03 19:44:01,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:44:01,377 INFO L470 AbstractCegarLoop]: Abstraction has 13958 states and 50462 transitions. [2022-03-03 19:44:01,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:01,377 INFO L276 IsEmpty]: Start isEmpty. Operand 13958 states and 50462 transitions. [2022-03-03 19:44:01,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:44:01,400 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:44:01,400 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:44:01,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-03 19:44:01,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:01,615 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:44:01,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:44:01,616 INFO L85 PathProgramCache]: Analyzing trace with hash 277277977, now seen corresponding path program 47 times [2022-03-03 19:44:01,616 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:44:01,616 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602672731] [2022-03-03 19:44:01,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:44:01,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:44:01,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:01,794 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:01,795 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:44:01,795 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602672731] [2022-03-03 19:44:01,795 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602672731] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:44:01,795 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472967431] [2022-03-03 19:44:01,795 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:44:01,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:01,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:44:01,804 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:44:01,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-03 19:44:01,838 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 19:44:01,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:44:01,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-03 19:44:01,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:44:01,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-03 19:44:02,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:02,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-03-03 19:44:02,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:02,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:02,488 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:44:02,489 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 43 treesize of output 69 [2022-03-03 19:44:02,846 INFO L353 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2022-03-03 19:44:02,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 249 treesize of output 203 [2022-03-03 19:44:02,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:02,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:02,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:02,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:02,851 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 38 treesize of output 28 [2022-03-03 19:44:02,968 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:02,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:44:03,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:03,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:03,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:03,552 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:44:03,552 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 153 treesize of output 148 [2022-03-03 19:44:03,556 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:03,556 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:03,557 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:03,569 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:44:03,569 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 117 treesize of output 112 [2022-03-03 19:44:03,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:03,572 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:03,573 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:03,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:03,746 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:03,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472967431] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:44:03,746 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:44:03,746 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 30 [2022-03-03 19:44:03,746 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688209486] [2022-03-03 19:44:03,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:44:03,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:44:03,747 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:44:03,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:44:03,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:44:03,748 INFO L87 Difference]: Start difference. First operand 13958 states and 50462 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:08,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:44:08,920 INFO L93 Difference]: Finished difference Result 17619 states and 62768 transitions. [2022-03-03 19:44:08,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-03 19:44:08,920 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:44:08,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:44:08,968 INFO L225 Difference]: With dead ends: 17619 [2022-03-03 19:44:08,968 INFO L226 Difference]: Without dead ends: 17590 [2022-03-03 19:44:08,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 53 SyntacticMatches, 10 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2009 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1079, Invalid=5401, Unknown=0, NotChecked=0, Total=6480 [2022-03-03 19:44:08,969 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 259 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 1542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1051 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:44:08,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 469 Invalid, 1542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 474 Invalid, 0 Unknown, 1051 Unchecked, 0.3s Time] [2022-03-03 19:44:08,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17590 states. [2022-03-03 19:44:09,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17590 to 14619. [2022-03-03 19:44:09,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14619 states, 14618 states have (on average 3.619715419346012) internal successors, (52913), 14618 states have internal predecessors, (52913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:09,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14619 states to 14619 states and 52913 transitions. [2022-03-03 19:44:09,295 INFO L78 Accepts]: Start accepts. Automaton has 14619 states and 52913 transitions. Word has length 30 [2022-03-03 19:44:09,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:44:09,295 INFO L470 AbstractCegarLoop]: Abstraction has 14619 states and 52913 transitions. [2022-03-03 19:44:09,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:09,295 INFO L276 IsEmpty]: Start isEmpty. Operand 14619 states and 52913 transitions. [2022-03-03 19:44:09,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:44:09,319 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:44:09,319 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:44:09,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-03 19:44:09,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-03-03 19:44:09,534 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:44:09,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:44:09,535 INFO L85 PathProgramCache]: Analyzing trace with hash -742540067, now seen corresponding path program 48 times [2022-03-03 19:44:09,535 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:44:09,535 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656613160] [2022-03-03 19:44:09,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:44:09,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:44:09,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:09,748 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:09,748 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:44:09,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656613160] [2022-03-03 19:44:09,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656613160] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:44:09,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106958985] [2022-03-03 19:44:09,749 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:44:09,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:09,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:44:09,750 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:44:09,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-03 19:44:09,785 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 19:44:09,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:44:09,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 19:44:09,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:44:09,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-03 19:44:09,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:09,930 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-03-03 19:44:10,096 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 32 treesize of output 24 [2022-03-03 19:44:10,098 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 29 treesize of output 21 [2022-03-03 19:44:10,119 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 26 treesize of output 18 [2022-03-03 19:44:10,155 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:10,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:44:10,320 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:44:10,321 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 78 treesize of output 97 [2022-03-03 19:44:10,324 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:10,324 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:10,339 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:44:10,340 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 60 treesize of output 83 [2022-03-03 19:44:10,346 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:44:10,347 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 978 treesize of output 930 [2022-03-03 19:44:10,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:10,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:10,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:10,619 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 78 treesize of output 60 [2022-03-03 19:44:10,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:10,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:10,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:10,622 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 60 treesize of output 42 [2022-03-03 19:44:10,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:10,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:10,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:10,730 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:10,730 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106958985] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:44:10,731 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:44:10,731 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-03-03 19:44:10,731 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589563081] [2022-03-03 19:44:10,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:44:10,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:44:10,731 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:44:10,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:44:10,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:44:10,731 INFO L87 Difference]: Start difference. First operand 14619 states and 52913 transitions. Second operand has 20 states, 20 states have (on average 3.35) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:11,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:44:11,115 INFO L93 Difference]: Finished difference Result 15793 states and 56665 transitions. [2022-03-03 19:44:11,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:44:11,115 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 19 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 30 [2022-03-03 19:44:11,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:44:11,157 INFO L225 Difference]: With dead ends: 15793 [2022-03-03 19:44:11,157 INFO L226 Difference]: Without dead ends: 15760 [2022-03-03 19:44:11,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:44:11,161 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 133 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:44:11,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 189 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 492 Invalid, 0 Unknown, 121 Unchecked, 0.2s Time] [2022-03-03 19:44:11,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15760 states. [2022-03-03 19:44:11,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15760 to 14779. [2022-03-03 19:44:11,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14779 states, 14778 states have (on average 3.6170659087833266) internal successors, (53453), 14778 states have internal predecessors, (53453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:11,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14779 states to 14779 states and 53453 transitions. [2022-03-03 19:44:11,566 INFO L78 Accepts]: Start accepts. Automaton has 14779 states and 53453 transitions. Word has length 30 [2022-03-03 19:44:11,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:44:11,566 INFO L470 AbstractCegarLoop]: Abstraction has 14779 states and 53453 transitions. [2022-03-03 19:44:11,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:11,566 INFO L276 IsEmpty]: Start isEmpty. Operand 14779 states and 53453 transitions. [2022-03-03 19:44:11,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:44:11,593 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:44:11,593 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:44:11,609 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-03-03 19:44:11,806 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,SelfDestructingSolverStorable55 [2022-03-03 19:44:11,807 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:44:11,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:44:11,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1479096771, now seen corresponding path program 49 times [2022-03-03 19:44:11,807 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:44:11,808 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93551146] [2022-03-03 19:44:11,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:44:11,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:44:11,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:12,026 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:12,026 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:44:12,026 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93551146] [2022-03-03 19:44:12,026 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93551146] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:44:12,026 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610890645] [2022-03-03 19:44:12,026 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:44:12,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:12,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:44:12,027 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:44:12,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-03 19:44:12,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:12,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 19:44:12,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:44:12,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-03 19:44:12,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:12,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-03-03 19:44:12,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:12,545 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 108 treesize of output 66 [2022-03-03 19:44:12,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:12,547 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 94 treesize of output 52 [2022-03-03 19:44:12,621 INFO L353 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2022-03-03 19:44:12,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 67 [2022-03-03 19:44:12,642 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:12,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:44:12,856 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:44:12,856 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 78 treesize of output 97 [2022-03-03 19:44:12,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:12,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:12,877 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:44:12,877 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 60 treesize of output 83 [2022-03-03 19:44:12,886 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:44:12,886 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 1766 treesize of output 1670 [2022-03-03 19:44:13,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:13,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:13,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:13,843 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 78 treesize of output 60 [2022-03-03 19:44:13,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:13,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:13,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:13,847 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 60 treesize of output 42 [2022-03-03 19:44:13,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:13,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:13,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:13,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:13,911 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:13,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610890645] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:44:13,911 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:44:13,911 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-03-03 19:44:13,911 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800081788] [2022-03-03 19:44:13,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:44:13,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:44:13,912 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:44:13,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:44:13,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:44:13,912 INFO L87 Difference]: Start difference. First operand 14779 states and 53453 transitions. Second operand has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:14,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:44:14,371 INFO L93 Difference]: Finished difference Result 15575 states and 55865 transitions. [2022-03-03 19:44:14,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 19:44:14,371 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:44:14,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:44:14,406 INFO L225 Difference]: With dead ends: 15575 [2022-03-03 19:44:14,406 INFO L226 Difference]: Without dead ends: 15542 [2022-03-03 19:44:14,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:44:14,406 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 104 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:44:14,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 195 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:44:14,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15542 states. [2022-03-03 19:44:14,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15542 to 14580. [2022-03-03 19:44:14,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14580 states, 14579 states have (on average 3.619795596405789) internal successors, (52773), 14579 states have internal predecessors, (52773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:14,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14580 states to 14580 states and 52773 transitions. [2022-03-03 19:44:14,648 INFO L78 Accepts]: Start accepts. Automaton has 14580 states and 52773 transitions. Word has length 30 [2022-03-03 19:44:14,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:44:14,648 INFO L470 AbstractCegarLoop]: Abstraction has 14580 states and 52773 transitions. [2022-03-03 19:44:14,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:14,648 INFO L276 IsEmpty]: Start isEmpty. Operand 14580 states and 52773 transitions. [2022-03-03 19:44:14,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:44:14,672 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:44:14,672 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:44:14,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-03 19:44:14,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-03-03 19:44:14,880 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:44:14,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:44:14,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1602758267, now seen corresponding path program 50 times [2022-03-03 19:44:14,881 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:44:14,881 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717646626] [2022-03-03 19:44:14,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:44:14,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:44:14,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:15,045 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:15,045 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:44:15,045 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717646626] [2022-03-03 19:44:15,045 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717646626] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:44:15,045 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923135723] [2022-03-03 19:44:15,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:44:15,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:15,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:44:15,056 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:44:15,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-03 19:44:15,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:44:15,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:44:15,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 19:44:15,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:44:15,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-03 19:44:15,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:15,270 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-03-03 19:44:15,469 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 37 treesize of output 29 [2022-03-03 19:44:15,502 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 32 treesize of output 24 [2022-03-03 19:44:15,504 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 31 treesize of output 23 [2022-03-03 19:44:15,526 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:15,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:44:15,708 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:44:15,708 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 78 treesize of output 97 [2022-03-03 19:44:15,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:15,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:15,740 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:44:15,740 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 60 treesize of output 83 [2022-03-03 19:44:15,749 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:44:15,750 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 488 treesize of output 464 [2022-03-03 19:44:16,035 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:16,036 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:16,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:16,037 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 78 treesize of output 60 [2022-03-03 19:44:16,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:16,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:16,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:16,042 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 60 treesize of output 42 [2022-03-03 19:44:16,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:16,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:16,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:16,131 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:16,132 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923135723] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:44:16,132 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:44:16,132 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-03-03 19:44:16,132 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195820899] [2022-03-03 19:44:16,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:44:16,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:44:16,132 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:44:16,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:44:16,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:44:16,133 INFO L87 Difference]: Start difference. First operand 14580 states and 52773 transitions. Second operand has 20 states, 20 states have (on average 3.5) internal successors, (70), 19 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:16,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:44:16,739 INFO L93 Difference]: Finished difference Result 15487 states and 55627 transitions. [2022-03-03 19:44:16,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 19:44:16,739 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 19 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:44:16,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:44:16,778 INFO L225 Difference]: With dead ends: 15487 [2022-03-03 19:44:16,778 INFO L226 Difference]: Without dead ends: 15454 [2022-03-03 19:44:16,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:44:16,778 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 88 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:44:16,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 274 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 823 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:44:16,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15454 states. [2022-03-03 19:44:16,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15454 to 14400. [2022-03-03 19:44:17,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14400 states, 14399 states have (on average 3.621154246822696) internal successors, (52141), 14399 states have internal predecessors, (52141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:17,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14400 states to 14400 states and 52141 transitions. [2022-03-03 19:44:17,049 INFO L78 Accepts]: Start accepts. Automaton has 14400 states and 52141 transitions. Word has length 30 [2022-03-03 19:44:17,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:44:17,049 INFO L470 AbstractCegarLoop]: Abstraction has 14400 states and 52141 transitions. [2022-03-03 19:44:17,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 19 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:17,049 INFO L276 IsEmpty]: Start isEmpty. Operand 14400 states and 52141 transitions. [2022-03-03 19:44:17,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:44:17,075 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:44:17,075 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:44:17,091 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-03-03 19:44:17,289 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,SelfDestructingSolverStorable57 [2022-03-03 19:44:17,289 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:44:17,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:44:17,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1465748903, now seen corresponding path program 51 times [2022-03-03 19:44:17,289 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:44:17,289 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942709174] [2022-03-03 19:44:17,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:44:17,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:44:17,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:17,451 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:17,451 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:44:17,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942709174] [2022-03-03 19:44:17,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942709174] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:44:17,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3759931] [2022-03-03 19:44:17,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:44:17,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:17,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:44:17,468 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:44:17,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-03 19:44:17,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-03 19:44:17,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:44:17,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-03 19:44:17,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:44:17,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-03 19:44:17,697 INFO L353 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2022-03-03 19:44:17,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-03 19:44:17,924 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-03-03 19:44:17,924 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 33 treesize of output 41 [2022-03-03 19:44:17,940 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:44:17,940 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 71 treesize of output 83 [2022-03-03 19:44:18,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:18,400 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:18,400 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 61 treesize of output 51 [2022-03-03 19:44:18,568 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:18,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:44:19,188 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:44:19,189 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 126 treesize of output 151 [2022-03-03 19:44:19,218 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:44:19,219 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 102 treesize of output 127 [2022-03-03 19:44:19,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:19,229 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:19,230 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 925 treesize of output 861 [2022-03-03 19:44:27,783 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:27,783 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3759931] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:44:27,783 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:44:27,783 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 27 [2022-03-03 19:44:27,783 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840791459] [2022-03-03 19:44:27,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:44:27,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 19:44:27,783 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:44:27,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 19:44:27,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:44:27,784 INFO L87 Difference]: Start difference. First operand 14400 states and 52141 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:31,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:44:31,428 INFO L93 Difference]: Finished difference Result 25864 states and 90108 transitions. [2022-03-03 19:44:31,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-03 19:44:31,428 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:44:31,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:44:31,495 INFO L225 Difference]: With dead ends: 25864 [2022-03-03 19:44:31,496 INFO L226 Difference]: Without dead ends: 25832 [2022-03-03 19:44:31,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2608 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1313, Invalid=6877, Unknown=0, NotChecked=0, Total=8190 [2022-03-03 19:44:31,497 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 290 mSDsluCounter, 1145 mSDsCounter, 0 mSdLazyCounter, 1500 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 2837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1302 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:44:31,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 680 Invalid, 2837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1500 Invalid, 0 Unknown, 1302 Unchecked, 0.7s Time] [2022-03-03 19:44:31,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25832 states. [2022-03-03 19:44:31,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25832 to 14555. [2022-03-03 19:44:31,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14555 states, 14554 states have (on average 3.6130960560670604) internal successors, (52585), 14554 states have internal predecessors, (52585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:31,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14555 states to 14555 states and 52585 transitions. [2022-03-03 19:44:31,978 INFO L78 Accepts]: Start accepts. Automaton has 14555 states and 52585 transitions. Word has length 30 [2022-03-03 19:44:31,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:44:31,978 INFO L470 AbstractCegarLoop]: Abstraction has 14555 states and 52585 transitions. [2022-03-03 19:44:31,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:31,978 INFO L276 IsEmpty]: Start isEmpty. Operand 14555 states and 52585 transitions. [2022-03-03 19:44:32,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:44:32,004 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:44:32,004 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:44:32,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-03 19:44:32,220 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,SelfDestructingSolverStorable58 [2022-03-03 19:44:32,221 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:44:32,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:44:32,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1700194329, now seen corresponding path program 52 times [2022-03-03 19:44:32,221 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:44:32,222 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649485404] [2022-03-03 19:44:32,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:44:32,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:44:32,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:32,460 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:32,461 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:44:32,461 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649485404] [2022-03-03 19:44:32,461 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649485404] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:44:32,461 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796137272] [2022-03-03 19:44:32,461 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:44:32,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:32,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:44:32,463 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:44:32,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-03 19:44:32,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:44:32,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:44:32,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 19:44:32,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:44:32,591 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-03-03 19:44:32,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:32,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-03-03 19:44:32,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:32,767 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 45 treesize of output 33 [2022-03-03 19:44:32,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:32,769 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 37 treesize of output 25 [2022-03-03 19:44:32,833 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 [2022-03-03 19:44:32,852 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:32,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:44:33,023 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:44:33,024 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 78 treesize of output 97 [2022-03-03 19:44:33,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:33,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:33,042 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:44:33,042 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 60 treesize of output 83 [2022-03-03 19:44:33,049 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:44:33,049 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 878 treesize of output 830 [2022-03-03 19:44:33,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:33,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:33,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:33,286 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 78 treesize of output 60 [2022-03-03 19:44:33,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:33,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:33,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:33,289 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 60 treesize of output 42 [2022-03-03 19:44:33,290 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:33,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:33,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:33,364 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:33,365 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796137272] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:44:33,365 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:44:33,365 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 22 [2022-03-03 19:44:33,365 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815728125] [2022-03-03 19:44:33,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:44:33,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:44:33,365 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:44:33,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:44:33,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:44:33,366 INFO L87 Difference]: Start difference. First operand 14555 states and 52585 transitions. Second operand has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:34,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:44:34,333 INFO L93 Difference]: Finished difference Result 19873 states and 70314 transitions. [2022-03-03 19:44:34,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 19:44:34,333 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:44:34,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:44:34,378 INFO L225 Difference]: With dead ends: 19873 [2022-03-03 19:44:34,378 INFO L226 Difference]: Without dead ends: 19840 [2022-03-03 19:44:34,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=156, Invalid=900, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:44:34,379 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 145 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 1344 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 1372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:44:34,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 261 Invalid, 1372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1344 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 19:44:34,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19840 states. [2022-03-03 19:44:34,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19840 to 14402. [2022-03-03 19:44:34,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14402 states, 14401 states have (on average 3.616762724810777) internal successors, (52085), 14401 states have internal predecessors, (52085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:34,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14402 states to 14402 states and 52085 transitions. [2022-03-03 19:44:34,831 INFO L78 Accepts]: Start accepts. Automaton has 14402 states and 52085 transitions. Word has length 30 [2022-03-03 19:44:34,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:44:34,832 INFO L470 AbstractCegarLoop]: Abstraction has 14402 states and 52085 transitions. [2022-03-03 19:44:34,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:34,832 INFO L276 IsEmpty]: Start isEmpty. Operand 14402 states and 52085 transitions. [2022-03-03 19:44:34,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:44:34,856 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:44:34,856 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:44:34,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-03 19:44:35,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-03-03 19:44:35,072 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:44:35,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:44:35,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1959107467, now seen corresponding path program 53 times [2022-03-03 19:44:35,073 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:44:35,073 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37201399] [2022-03-03 19:44:35,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:44:35,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:44:35,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:35,118 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:35,119 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:44:35,119 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37201399] [2022-03-03 19:44:35,119 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37201399] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:44:35,119 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602745556] [2022-03-03 19:44:35,119 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:44:35,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:35,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:44:35,120 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:44:35,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-03 19:44:35,170 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:44:35,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:44:35,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:44:35,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:44:35,227 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:35,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:44:35,297 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:35,297 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602745556] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:44:35,297 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:44:35,297 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-03-03 19:44:35,297 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798169136] [2022-03-03 19:44:35,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:44:35,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 19:44:35,297 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:44:35,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 19:44:35,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:44:35,298 INFO L87 Difference]: Start difference. First operand 14402 states and 52085 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:35,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:44:35,593 INFO L93 Difference]: Finished difference Result 18934 states and 66901 transitions. [2022-03-03 19:44:35,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 19:44:35,593 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 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 32 [2022-03-03 19:44:35,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:44:35,639 INFO L225 Difference]: With dead ends: 18934 [2022-03-03 19:44:35,639 INFO L226 Difference]: Without dead ends: 18868 [2022-03-03 19:44:35,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-03-03 19:44:35,640 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 112 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:44:35,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 199 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:44:35,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18868 states. [2022-03-03 19:44:35,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18868 to 15192. [2022-03-03 19:44:35,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15192 states, 15191 states have (on average 3.615101046672372) internal successors, (54917), 15191 states have internal predecessors, (54917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:35,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15192 states to 15192 states and 54917 transitions. [2022-03-03 19:44:35,951 INFO L78 Accepts]: Start accepts. Automaton has 15192 states and 54917 transitions. Word has length 32 [2022-03-03 19:44:35,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:44:35,951 INFO L470 AbstractCegarLoop]: Abstraction has 15192 states and 54917 transitions. [2022-03-03 19:44:35,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:35,951 INFO L276 IsEmpty]: Start isEmpty. Operand 15192 states and 54917 transitions. [2022-03-03 19:44:35,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:44:35,978 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:44:35,978 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:44:35,995 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-03-03 19:44:36,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:36,195 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:44:36,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:44:36,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1104567263, now seen corresponding path program 54 times [2022-03-03 19:44:36,195 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:44:36,195 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378639597] [2022-03-03 19:44:36,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:44:36,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:44:36,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:36,255 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:44:36,255 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:44:36,255 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378639597] [2022-03-03 19:44:36,256 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378639597] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:44:36,256 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016881314] [2022-03-03 19:44:36,256 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:44:36,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:36,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:44:36,257 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:44:36,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-03 19:44:36,304 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 19:44:36,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:44:36,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:44:36,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:44:36,400 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:44:36,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:44:36,454 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:44:36,454 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016881314] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:44:36,454 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:44:36,454 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2022-03-03 19:44:36,454 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749749827] [2022-03-03 19:44:36,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:44:36,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 19:44:36,455 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:44:36,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 19:44:36,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-03-03 19:44:36,455 INFO L87 Difference]: Start difference. First operand 15192 states and 54917 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:37,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:44:37,890 INFO L93 Difference]: Finished difference Result 35953 states and 124062 transitions. [2022-03-03 19:44:37,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-03 19:44:37,890 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 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 32 [2022-03-03 19:44:37,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:44:38,010 INFO L225 Difference]: With dead ends: 35953 [2022-03-03 19:44:38,011 INFO L226 Difference]: Without dead ends: 35659 [2022-03-03 19:44:38,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3652 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1722, Invalid=7784, Unknown=0, NotChecked=0, Total=9506 [2022-03-03 19:44:38,012 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 578 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 1155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:44:38,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [578 Valid, 233 Invalid, 1155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1030 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 19:44:38,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35659 states. [2022-03-03 19:44:38,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35659 to 25698. [2022-03-03 19:44:38,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25698 states, 25697 states have (on average 3.710900105070631) internal successors, (95359), 25697 states have internal predecessors, (95359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:38,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25698 states to 25698 states and 95359 transitions. [2022-03-03 19:44:38,806 INFO L78 Accepts]: Start accepts. Automaton has 25698 states and 95359 transitions. Word has length 32 [2022-03-03 19:44:38,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:44:38,806 INFO L470 AbstractCegarLoop]: Abstraction has 25698 states and 95359 transitions. [2022-03-03 19:44:38,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:38,807 INFO L276 IsEmpty]: Start isEmpty. Operand 25698 states and 95359 transitions. [2022-03-03 19:44:38,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:44:38,856 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:44:38,856 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:44:38,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-03 19:44:39,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:39,073 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:44:39,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:44:39,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1606264049, now seen corresponding path program 55 times [2022-03-03 19:44:39,073 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:44:39,073 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530777049] [2022-03-03 19:44:39,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:44:39,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:44:39,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:39,106 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:39,106 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:44:39,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530777049] [2022-03-03 19:44:39,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530777049] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:44:39,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267811394] [2022-03-03 19:44:39,106 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:44:39,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:39,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:44:39,124 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:44:39,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-03 19:44:39,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:39,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:44:39,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:44:39,209 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:39,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:44:39,266 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:39,266 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267811394] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:44:39,266 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:44:39,266 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-03-03 19:44:39,266 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739624193] [2022-03-03 19:44:39,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:44:39,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-03 19:44:39,266 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:44:39,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-03 19:44:39,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-03 19:44:39,267 INFO L87 Difference]: Start difference. First operand 25698 states and 95359 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:39,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:44:39,491 INFO L93 Difference]: Finished difference Result 27246 states and 99861 transitions. [2022-03-03 19:44:39,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 19:44:39,492 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 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 32 [2022-03-03 19:44:39,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:44:39,566 INFO L225 Difference]: With dead ends: 27246 [2022-03-03 19:44:39,567 INFO L226 Difference]: Without dead ends: 27222 [2022-03-03 19:44:39,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-03 19:44:39,567 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 70 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:44:39,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 119 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:44:39,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27222 states. [2022-03-03 19:44:40,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27222 to 25622. [2022-03-03 19:44:40,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25622 states, 25621 states have (on average 3.71164279302135) internal successors, (95096), 25621 states have internal predecessors, (95096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:40,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25622 states to 25622 states and 95096 transitions. [2022-03-03 19:44:40,400 INFO L78 Accepts]: Start accepts. Automaton has 25622 states and 95096 transitions. Word has length 32 [2022-03-03 19:44:40,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:44:40,400 INFO L470 AbstractCegarLoop]: Abstraction has 25622 states and 95096 transitions. [2022-03-03 19:44:40,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:40,401 INFO L276 IsEmpty]: Start isEmpty. Operand 25622 states and 95096 transitions. [2022-03-03 19:44:40,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:44:40,552 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:44:40,552 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:44:40,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-03-03 19:44:40,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:40,769 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:44:40,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:44:40,770 INFO L85 PathProgramCache]: Analyzing trace with hash 252646705, now seen corresponding path program 56 times [2022-03-03 19:44:40,770 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:44:40,770 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562750185] [2022-03-03 19:44:40,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:44:40,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:44:40,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:40,803 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:44:40,803 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:44:40,804 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562750185] [2022-03-03 19:44:40,804 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562750185] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:44:40,804 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967189005] [2022-03-03 19:44:40,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:44:40,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:40,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:44:40,832 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:44:40,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-03 19:44:40,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:44:40,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:44:40,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:44:40,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:44:40,982 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:44:40,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:44:41,035 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:44:41,035 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967189005] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:44:41,035 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:44:41,036 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 12 [2022-03-03 19:44:41,036 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538934464] [2022-03-03 19:44:41,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:44:41,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-03 19:44:41,037 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:44:41,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-03 19:44:41,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-03-03 19:44:41,040 INFO L87 Difference]: Start difference. First operand 25622 states and 95096 transitions. Second operand has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 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) [2022-03-03 19:44:42,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:44:42,698 INFO L93 Difference]: Finished difference Result 79810 states and 282459 transitions. [2022-03-03 19:44:42,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-03 19:44:42,699 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 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 32 [2022-03-03 19:44:42,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:44:43,068 INFO L225 Difference]: With dead ends: 79810 [2022-03-03 19:44:43,069 INFO L226 Difference]: Without dead ends: 79786 [2022-03-03 19:44:43,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2018 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1390, Invalid=4160, Unknown=0, NotChecked=0, Total=5550 [2022-03-03 19:44:43,069 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 494 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:44:43,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [494 Valid, 250 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:44:43,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79786 states. [2022-03-03 19:44:44,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79786 to 35022. [2022-03-03 19:44:44,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35022 states, 35021 states have (on average 3.7379572256646014) internal successors, (130907), 35021 states have internal predecessors, (130907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:44,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35022 states to 35022 states and 130907 transitions. [2022-03-03 19:44:44,737 INFO L78 Accepts]: Start accepts. Automaton has 35022 states and 130907 transitions. Word has length 32 [2022-03-03 19:44:44,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:44:44,737 INFO L470 AbstractCegarLoop]: Abstraction has 35022 states and 130907 transitions. [2022-03-03 19:44:44,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 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) [2022-03-03 19:44:44,737 INFO L276 IsEmpty]: Start isEmpty. Operand 35022 states and 130907 transitions. [2022-03-03 19:44:44,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:44:44,798 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:44:44,798 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:44:44,814 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-03-03 19:44:45,005 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,SelfDestructingSolverStorable63 [2022-03-03 19:44:45,005 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:44:45,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:44:45,006 INFO L85 PathProgramCache]: Analyzing trace with hash 58249501, now seen corresponding path program 57 times [2022-03-03 19:44:45,006 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:44:45,006 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360802836] [2022-03-03 19:44:45,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:44:45,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:44:45,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:45,039 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:44:45,039 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:44:45,039 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360802836] [2022-03-03 19:44:45,039 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360802836] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:44:45,039 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465250721] [2022-03-03 19:44:45,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:44:45,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:45,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:44:45,056 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:44:45,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-03 19:44:45,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-03 19:44:45,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:44:45,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 19:44:45,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:44:45,165 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:45,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:44:45,217 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:45,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465250721] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:44:45,218 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:44:45,218 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 10 [2022-03-03 19:44:45,218 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525558856] [2022-03-03 19:44:45,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:44:45,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 19:44:45,218 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:44:45,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 19:44:45,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-03-03 19:44:45,218 INFO L87 Difference]: Start difference. First operand 35022 states and 130907 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:46,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:44:46,503 INFO L93 Difference]: Finished difference Result 88617 states and 320525 transitions. [2022-03-03 19:44:46,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-03 19:44:46,504 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 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 32 [2022-03-03 19:44:46,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:44:47,038 INFO L225 Difference]: With dead ends: 88617 [2022-03-03 19:44:47,038 INFO L226 Difference]: Without dead ends: 88165 [2022-03-03 19:44:47,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=478, Invalid=1592, Unknown=0, NotChecked=0, Total=2070 [2022-03-03 19:44:47,039 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 596 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 596 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:44:47,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [596 Valid, 158 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:44:47,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88165 states. [2022-03-03 19:44:48,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88165 to 53900. [2022-03-03 19:44:49,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53900 states, 53899 states have (on average 3.7885860591105587) internal successors, (204201), 53899 states have internal predecessors, (204201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:49,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53900 states to 53900 states and 204201 transitions. [2022-03-03 19:44:49,481 INFO L78 Accepts]: Start accepts. Automaton has 53900 states and 204201 transitions. Word has length 32 [2022-03-03 19:44:49,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:44:49,481 INFO L470 AbstractCegarLoop]: Abstraction has 53900 states and 204201 transitions. [2022-03-03 19:44:49,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:49,481 INFO L276 IsEmpty]: Start isEmpty. Operand 53900 states and 204201 transitions. [2022-03-03 19:44:49,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:44:49,589 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:44:49,589 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:44:49,605 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-03-03 19:44:49,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-03-03 19:44:49,805 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:44:49,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:44:49,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1948005981, now seen corresponding path program 58 times [2022-03-03 19:44:49,806 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:44:49,806 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323334066] [2022-03-03 19:44:49,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:44:49,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:44:49,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:49,861 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:44:49,862 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:44:49,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323334066] [2022-03-03 19:44:49,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323334066] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:44:49,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105746881] [2022-03-03 19:44:49,862 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:44:49,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:49,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:44:49,863 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:44:49,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-03 19:44:49,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:44:49,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:44:49,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:44:49,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:44:49,976 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:49,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:44:50,035 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:50,035 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105746881] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:44:50,035 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:44:50,035 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-03-03 19:44:50,035 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410901040] [2022-03-03 19:44:50,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:44:50,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-03 19:44:50,036 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:44:50,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-03 19:44:50,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-03 19:44:50,036 INFO L87 Difference]: Start difference. First operand 53900 states and 204201 transitions. Second operand has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 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) [2022-03-03 19:44:52,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:44:52,243 INFO L93 Difference]: Finished difference Result 126257 states and 472403 transitions. [2022-03-03 19:44:52,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-03 19:44:52,244 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 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 32 [2022-03-03 19:44:52,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:44:53,063 INFO L225 Difference]: With dead ends: 126257 [2022-03-03 19:44:53,063 INFO L226 Difference]: Without dead ends: 125683 [2022-03-03 19:44:53,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1721 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=908, Invalid=3784, Unknown=0, NotChecked=0, Total=4692 [2022-03-03 19:44:53,064 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 752 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 752 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:44:53,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [752 Valid, 151 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:44:53,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125683 states. [2022-03-03 19:44:56,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125683 to 99474. [2022-03-03 19:44:56,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99474 states, 99473 states have (on average 3.860756185095453) internal successors, (384041), 99473 states have internal predecessors, (384041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:57,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99474 states to 99474 states and 384041 transitions. [2022-03-03 19:44:57,673 INFO L78 Accepts]: Start accepts. Automaton has 99474 states and 384041 transitions. Word has length 32 [2022-03-03 19:44:57,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:44:57,673 INFO L470 AbstractCegarLoop]: Abstraction has 99474 states and 384041 transitions. [2022-03-03 19:44:57,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 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) [2022-03-03 19:44:57,674 INFO L276 IsEmpty]: Start isEmpty. Operand 99474 states and 384041 transitions. [2022-03-03 19:44:57,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:44:57,830 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:44:57,830 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:44:57,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-03-03 19:44:58,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:58,043 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:44:58,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:44:58,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1979731235, now seen corresponding path program 59 times [2022-03-03 19:44:58,044 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:44:58,044 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362101079] [2022-03-03 19:44:58,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:44:58,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:44:58,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:58,080 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:44:58,081 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:44:58,081 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362101079] [2022-03-03 19:44:58,081 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362101079] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:44:58,081 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948536930] [2022-03-03 19:44:58,081 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:44:58,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:58,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:44:58,082 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:44:58,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-03 19:44:58,122 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 19:44:58,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:44:58,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:44:58,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:44:58,180 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:44:58,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:44:58,248 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:44:58,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948536930] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:44:58,248 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:44:58,248 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-03-03 19:44:58,249 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494648160] [2022-03-03 19:44:58,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:44:58,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-03 19:44:58,249 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:44:58,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-03 19:44:58,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-03-03 19:44:58,249 INFO L87 Difference]: Start difference. First operand 99474 states and 384041 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:59,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:44:59,466 INFO L93 Difference]: Finished difference Result 125056 states and 477423 transitions. [2022-03-03 19:44:59,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-03 19:44:59,467 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 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 32 [2022-03-03 19:44:59,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:00,398 INFO L225 Difference]: With dead ends: 125056 [2022-03-03 19:45:00,399 INFO L226 Difference]: Without dead ends: 125056 [2022-03-03 19:45:00,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-03-03 19:45:00,399 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 92 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:00,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 60 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:45:00,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125056 states. [2022-03-03 19:45:03,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125056 to 106002. [2022-03-03 19:45:03,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106002 states, 106001 states have (on average 3.8668974820992257) internal successors, (409895), 106001 states have internal predecessors, (409895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:04,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106002 states to 106002 states and 409895 transitions. [2022-03-03 19:45:04,366 INFO L78 Accepts]: Start accepts. Automaton has 106002 states and 409895 transitions. Word has length 32 [2022-03-03 19:45:04,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:04,366 INFO L470 AbstractCegarLoop]: Abstraction has 106002 states and 409895 transitions. [2022-03-03 19:45:04,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:04,366 INFO L276 IsEmpty]: Start isEmpty. Operand 106002 states and 409895 transitions. [2022-03-03 19:45:04,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:45:04,881 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:04,881 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:04,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-03-03 19:45:05,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:05,095 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:45:05,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:05,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1813915461, now seen corresponding path program 60 times [2022-03-03 19:45:05,096 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:05,097 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541327470] [2022-03-03 19:45:05,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:05,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:05,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:05,140 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-03 19:45:05,140 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:05,140 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541327470] [2022-03-03 19:45:05,140 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541327470] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:05,140 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4465692] [2022-03-03 19:45:05,140 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:45:05,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:05,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:05,152 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:05,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-03 19:45:05,189 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 19:45:05,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:05,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:45:05,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:05,262 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-03 19:45:05,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:05,314 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-03 19:45:05,314 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4465692] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:05,314 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:05,314 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-03-03 19:45:05,314 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197017848] [2022-03-03 19:45:05,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:05,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 19:45:05,315 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:05,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 19:45:05,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-03-03 19:45:05,315 INFO L87 Difference]: Start difference. First operand 106002 states and 409895 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:07,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:07,390 INFO L93 Difference]: Finished difference Result 147426 states and 553881 transitions. [2022-03-03 19:45:07,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-03 19:45:07,390 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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 32 [2022-03-03 19:45:07,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:08,401 INFO L225 Difference]: With dead ends: 147426 [2022-03-03 19:45:08,401 INFO L226 Difference]: Without dead ends: 147296 [2022-03-03 19:45:08,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=684, Invalid=2738, Unknown=0, NotChecked=0, Total=3422 [2022-03-03 19:45:08,402 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 499 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:08,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [499 Valid, 199 Invalid, 861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 19:45:08,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147296 states. [2022-03-03 19:45:12,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147296 to 112553. [2022-03-03 19:45:12,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112553 states, 112552 states have (on average 3.8479991470609143) internal successors, (433100), 112552 states have internal predecessors, (433100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:13,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112553 states to 112553 states and 433100 transitions. [2022-03-03 19:45:13,044 INFO L78 Accepts]: Start accepts. Automaton has 112553 states and 433100 transitions. Word has length 32 [2022-03-03 19:45:13,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:13,044 INFO L470 AbstractCegarLoop]: Abstraction has 112553 states and 433100 transitions. [2022-03-03 19:45:13,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:13,044 INFO L276 IsEmpty]: Start isEmpty. Operand 112553 states and 433100 transitions. [2022-03-03 19:45:13,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:45:13,205 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:13,205 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:13,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-03-03 19:45:13,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-03-03 19:45:13,419 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:45:13,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:13,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1955119675, now seen corresponding path program 61 times [2022-03-03 19:45:13,420 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:13,420 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000398640] [2022-03-03 19:45:13,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:13,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:13,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:13,462 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:13,462 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:13,462 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000398640] [2022-03-03 19:45:13,462 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000398640] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:13,462 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236473452] [2022-03-03 19:45:13,462 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:45:13,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:13,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:13,464 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:13,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-03 19:45:13,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:13,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:45:13,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:13,583 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:45:13,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:13,641 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:45:13,641 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236473452] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:13,641 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:13,641 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-03-03 19:45:13,641 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911057574] [2022-03-03 19:45:13,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:13,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-03 19:45:13,641 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:13,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-03 19:45:13,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-03-03 19:45:13,642 INFO L87 Difference]: Start difference. First operand 112553 states and 433100 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:15,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:15,091 INFO L93 Difference]: Finished difference Result 128721 states and 491820 transitions. [2022-03-03 19:45:15,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 19:45:15,091 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 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 32 [2022-03-03 19:45:15,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:15,675 INFO L225 Difference]: With dead ends: 128721 [2022-03-03 19:45:15,676 INFO L226 Difference]: Without dead ends: 128703 [2022-03-03 19:45:15,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-03-03 19:45:15,676 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 108 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:15,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 88 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:45:15,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128703 states. [2022-03-03 19:45:18,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128703 to 119800. [2022-03-03 19:45:18,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119800 states, 119799 states have (on average 3.8597901484987354) internal successors, (462399), 119799 states have internal predecessors, (462399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:19,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119800 states to 119800 states and 462399 transitions. [2022-03-03 19:45:19,637 INFO L78 Accepts]: Start accepts. Automaton has 119800 states and 462399 transitions. Word has length 32 [2022-03-03 19:45:19,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:19,637 INFO L470 AbstractCegarLoop]: Abstraction has 119800 states and 462399 transitions. [2022-03-03 19:45:19,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:19,637 INFO L276 IsEmpty]: Start isEmpty. Operand 119800 states and 462399 transitions. [2022-03-03 19:45:20,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:45:20,179 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:20,179 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:20,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-03-03 19:45:20,395 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,SelfDestructingSolverStorable68 [2022-03-03 19:45:20,395 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:45:20,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:20,395 INFO L85 PathProgramCache]: Analyzing trace with hash -804316941, now seen corresponding path program 62 times [2022-03-03 19:45:20,396 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:20,396 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579482910] [2022-03-03 19:45:20,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:20,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:20,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:20,434 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:45:20,434 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:20,434 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579482910] [2022-03-03 19:45:20,434 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579482910] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:20,434 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30344891] [2022-03-03 19:45:20,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:45:20,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:20,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:20,452 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:20,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-03 19:45:20,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:45:20,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:20,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:45:20,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:20,573 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:45:20,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:20,634 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:45:20,634 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30344891] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:20,634 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:20,634 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2022-03-03 19:45:20,634 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106795407] [2022-03-03 19:45:20,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:20,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-03 19:45:20,635 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:20,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-03 19:45:20,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-03-03 19:45:20,635 INFO L87 Difference]: Start difference. First operand 119800 states and 462399 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:25,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:25,481 INFO L93 Difference]: Finished difference Result 306930 states and 1138918 transitions. [2022-03-03 19:45:25,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-03 19:45:25,481 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-03 19:45:25,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:27,424 INFO L225 Difference]: With dead ends: 306930 [2022-03-03 19:45:27,424 INFO L226 Difference]: Without dead ends: 306766 [2022-03-03 19:45:27,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2280 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1270, Invalid=4430, Unknown=0, NotChecked=0, Total=5700 [2022-03-03 19:45:27,425 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 504 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:27,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [504 Valid, 280 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 19:45:27,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306766 states. [2022-03-03 19:45:36,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306766 to 209656. [2022-03-03 19:45:37,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209656 states, 209655 states have (on average 3.8897665211895736) internal successors, (815509), 209655 states have internal predecessors, (815509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:38,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209656 states to 209656 states and 815509 transitions. [2022-03-03 19:45:38,510 INFO L78 Accepts]: Start accepts. Automaton has 209656 states and 815509 transitions. Word has length 32 [2022-03-03 19:45:38,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:38,510 INFO L470 AbstractCegarLoop]: Abstraction has 209656 states and 815509 transitions. [2022-03-03 19:45:38,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:38,510 INFO L276 IsEmpty]: Start isEmpty. Operand 209656 states and 815509 transitions. [2022-03-03 19:45:38,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:45:38,780 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:38,780 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:38,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-03-03 19:45:38,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:38,991 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:45:38,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:38,992 INFO L85 PathProgramCache]: Analyzing trace with hash -593546441, now seen corresponding path program 63 times [2022-03-03 19:45:38,992 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:38,992 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309749182] [2022-03-03 19:45:38,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:38,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:38,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:39,043 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:39,044 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:39,044 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309749182] [2022-03-03 19:45:39,044 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309749182] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:39,044 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722118565] [2022-03-03 19:45:39,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:45:39,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:39,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:39,045 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:39,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-03 19:45:39,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-03 19:45:39,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:39,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:45:39,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:39,432 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:45:39,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:39,474 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:45:39,474 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722118565] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:39,474 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:39,474 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 13 [2022-03-03 19:45:39,474 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030338689] [2022-03-03 19:45:39,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:39,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 19:45:39,474 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:39,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 19:45:39,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-03-03 19:45:39,475 INFO L87 Difference]: Start difference. First operand 209656 states and 815509 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:43,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:43,417 INFO L93 Difference]: Finished difference Result 304768 states and 1123004 transitions. [2022-03-03 19:45:43,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-03 19:45:43,417 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 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 32 [2022-03-03 19:45:43,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:45,540 INFO L225 Difference]: With dead ends: 304768 [2022-03-03 19:45:45,541 INFO L226 Difference]: Without dead ends: 304472 [2022-03-03 19:45:45,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1993 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1313, Invalid=3943, Unknown=0, NotChecked=0, Total=5256 [2022-03-03 19:45:45,541 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 625 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 625 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:45,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [625 Valid, 353 Invalid, 1132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 973 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 19:45:45,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304472 states. [2022-03-03 19:45:53,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304472 to 149380. [2022-03-03 19:45:53,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149380 states, 149379 states have (on average 3.857938532189933) internal successors, (576295), 149379 states have internal predecessors, (576295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:54,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149380 states to 149380 states and 576295 transitions. [2022-03-03 19:45:54,802 INFO L78 Accepts]: Start accepts. Automaton has 149380 states and 576295 transitions. Word has length 32 [2022-03-03 19:45:54,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:54,802 INFO L470 AbstractCegarLoop]: Abstraction has 149380 states and 576295 transitions. [2022-03-03 19:45:54,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:54,803 INFO L276 IsEmpty]: Start isEmpty. Operand 149380 states and 576295 transitions. [2022-03-03 19:45:54,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:45:54,957 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:54,958 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:54,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-03-03 19:45:55,175 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,SelfDestructingSolverStorable70 [2022-03-03 19:45:55,175 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:45:55,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:55,175 INFO L85 PathProgramCache]: Analyzing trace with hash 785955533, now seen corresponding path program 64 times [2022-03-03 19:45:55,175 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:55,176 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799742905] [2022-03-03 19:45:55,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:55,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:55,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:55,208 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:55,208 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:55,208 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799742905] [2022-03-03 19:45:55,208 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799742905] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:55,208 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652565574] [2022-03-03 19:45:55,208 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:45:55,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:55,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:55,209 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:55,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-03 19:45:55,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:45:55,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:55,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:45:55,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:55,324 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:45:55,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:55,384 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:45:55,385 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652565574] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:55,385 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:55,385 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-03-03 19:45:55,385 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336608755] [2022-03-03 19:45:55,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:55,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-03 19:45:55,386 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:55,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-03 19:45:55,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-03-03 19:45:55,386 INFO L87 Difference]: Start difference. First operand 149380 states and 576295 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:57,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:57,168 INFO L93 Difference]: Finished difference Result 159580 states and 608890 transitions. [2022-03-03 19:45:57,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 19:45:57,169 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 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 32 [2022-03-03 19:45:57,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:57,951 INFO L225 Difference]: With dead ends: 159580 [2022-03-03 19:45:57,951 INFO L226 Difference]: Without dead ends: 159562 [2022-03-03 19:45:57,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2022-03-03 19:45:57,951 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 113 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:57,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 136 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:45:58,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159562 states. [2022-03-03 19:46:02,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159562 to 148130. [2022-03-03 19:46:02,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148130 states, 148129 states have (on average 3.840368867676147) internal successors, (568870), 148129 states have internal predecessors, (568870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:03,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148130 states to 148130 states and 568870 transitions. [2022-03-03 19:46:03,542 INFO L78 Accepts]: Start accepts. Automaton has 148130 states and 568870 transitions. Word has length 32 [2022-03-03 19:46:03,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:03,542 INFO L470 AbstractCegarLoop]: Abstraction has 148130 states and 568870 transitions. [2022-03-03 19:46:03,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:03,542 INFO L276 IsEmpty]: Start isEmpty. Operand 148130 states and 568870 transitions. [2022-03-03 19:46:03,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:46:03,939 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:03,939 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:03,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-03-03 19:46:04,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:04,155 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:46:04,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:04,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1387084889, now seen corresponding path program 65 times [2022-03-03 19:46:04,155 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:04,155 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98015882] [2022-03-03 19:46:04,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:04,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:04,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:04,193 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:46:04,194 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:04,194 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98015882] [2022-03-03 19:46:04,194 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98015882] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:04,194 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233421580] [2022-03-03 19:46:04,194 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:46:04,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:04,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:04,195 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:46:04,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-03 19:46:04,234 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 19:46:04,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:46:04,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:46:04,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:04,293 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:46:04,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:04,358 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:46:04,358 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233421580] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:04,358 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:04,358 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-03-03 19:46:04,358 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812390482] [2022-03-03 19:46:04,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:04,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 19:46:04,358 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:04,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 19:46:04,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:46:04,359 INFO L87 Difference]: Start difference. First operand 148130 states and 568870 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 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) [2022-03-03 19:46:06,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:06,003 INFO L93 Difference]: Finished difference Result 164627 states and 624211 transitions. [2022-03-03 19:46:06,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:46:06,004 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 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 32 [2022-03-03 19:46:06,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:07,189 INFO L225 Difference]: With dead ends: 164627 [2022-03-03 19:46:07,189 INFO L226 Difference]: Without dead ends: 164471 [2022-03-03 19:46:07,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-03-03 19:46:07,191 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 204 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:07,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 57 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:46:07,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164471 states. [2022-03-03 19:46:11,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164471 to 155402. [2022-03-03 19:46:11,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155402 states, 155401 states have (on average 3.8356831680619816) internal successors, (596069), 155401 states have internal predecessors, (596069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:12,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155402 states to 155402 states and 596069 transitions. [2022-03-03 19:46:12,824 INFO L78 Accepts]: Start accepts. Automaton has 155402 states and 596069 transitions. Word has length 32 [2022-03-03 19:46:12,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:12,824 INFO L470 AbstractCegarLoop]: Abstraction has 155402 states and 596069 transitions. [2022-03-03 19:46:12,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 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) [2022-03-03 19:46:12,824 INFO L276 IsEmpty]: Start isEmpty. Operand 155402 states and 596069 transitions. [2022-03-03 19:46:12,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:46:12,997 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:12,997 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:13,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-03-03 19:46:13,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:13,203 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:46:13,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:13,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1733314855, now seen corresponding path program 66 times [2022-03-03 19:46:13,204 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:13,204 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504274013] [2022-03-03 19:46:13,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:13,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:13,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:13,230 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:46:13,230 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:13,230 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504274013] [2022-03-03 19:46:13,230 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504274013] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:13,230 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507441750] [2022-03-03 19:46:13,230 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:46:13,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:13,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:13,231 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:46:13,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-03 19:46:13,271 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 19:46:13,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:46:13,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:46:13,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:13,313 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:46:13,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:13,353 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:46:13,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507441750] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:13,353 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:13,353 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-03-03 19:46:13,353 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452832385] [2022-03-03 19:46:13,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:13,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-03 19:46:13,353 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:13,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-03 19:46:13,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-03 19:46:13,354 INFO L87 Difference]: Start difference. First operand 155402 states and 596069 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 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) [2022-03-03 19:46:15,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:15,133 INFO L93 Difference]: Finished difference Result 181166 states and 684577 transitions. [2022-03-03 19:46:15,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 19:46:15,133 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 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 32 [2022-03-03 19:46:15,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:16,420 INFO L225 Difference]: With dead ends: 181166 [2022-03-03 19:46:16,420 INFO L226 Difference]: Without dead ends: 181166 [2022-03-03 19:46:16,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-03-03 19:46:16,420 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 129 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:16,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 58 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:46:16,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181166 states. [2022-03-03 19:46:20,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181166 to 155312. [2022-03-03 19:46:21,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155312 states, 155311 states have (on average 3.8357875488535904) internal successors, (595740), 155311 states have internal predecessors, (595740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:22,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155312 states to 155312 states and 595740 transitions. [2022-03-03 19:46:22,238 INFO L78 Accepts]: Start accepts. Automaton has 155312 states and 595740 transitions. Word has length 32 [2022-03-03 19:46:22,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:22,238 INFO L470 AbstractCegarLoop]: Abstraction has 155312 states and 595740 transitions. [2022-03-03 19:46:22,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 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) [2022-03-03 19:46:22,238 INFO L276 IsEmpty]: Start isEmpty. Operand 155312 states and 595740 transitions. [2022-03-03 19:46:22,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:46:22,392 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:22,392 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:22,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-03-03 19:46:22,607 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,SelfDestructingSolverStorable73 [2022-03-03 19:46:22,608 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:46:22,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:22,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1439066337, now seen corresponding path program 67 times [2022-03-03 19:46:22,608 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:22,608 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050027942] [2022-03-03 19:46:22,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:22,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:22,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:22,649 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:46:22,649 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:22,649 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050027942] [2022-03-03 19:46:22,649 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050027942] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:22,649 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984548429] [2022-03-03 19:46:22,649 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:46:22,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:22,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:22,651 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:46:22,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-03 19:46:22,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:22,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:46:22,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:22,768 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:22,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:22,824 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:22,824 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984548429] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:22,824 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:22,824 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-03-03 19:46:22,824 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020914410] [2022-03-03 19:46:22,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:22,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 19:46:22,825 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:22,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 19:46:22,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-03-03 19:46:22,825 INFO L87 Difference]: Start difference. First operand 155312 states and 595740 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 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) [2022-03-03 19:46:26,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:26,299 INFO L93 Difference]: Finished difference Result 226844 states and 855043 transitions. [2022-03-03 19:46:26,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-03 19:46:26,299 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 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 32 [2022-03-03 19:46:26,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:27,424 INFO L225 Difference]: With dead ends: 226844 [2022-03-03 19:46:27,424 INFO L226 Difference]: Without dead ends: 226494 [2022-03-03 19:46:27,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2711 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1367, Invalid=5605, Unknown=0, NotChecked=0, Total=6972 [2022-03-03 19:46:27,424 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 741 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 950 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 741 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 1143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:27,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [741 Valid, 195 Invalid, 1143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 950 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 19:46:27,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226494 states. [2022-03-03 19:46:33,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226494 to 172378. [2022-03-03 19:46:33,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172378 states, 172377 states have (on average 3.8375131253009394) internal successors, (661499), 172377 states have internal predecessors, (661499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:34,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172378 states to 172378 states and 661499 transitions. [2022-03-03 19:46:34,510 INFO L78 Accepts]: Start accepts. Automaton has 172378 states and 661499 transitions. Word has length 32 [2022-03-03 19:46:34,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:34,511 INFO L470 AbstractCegarLoop]: Abstraction has 172378 states and 661499 transitions. [2022-03-03 19:46:34,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 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) [2022-03-03 19:46:34,511 INFO L276 IsEmpty]: Start isEmpty. Operand 172378 states and 661499 transitions. [2022-03-03 19:46:34,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:46:34,716 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:34,716 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:34,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-03-03 19:46:34,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:34,933 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:46:34,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:34,934 INFO L85 PathProgramCache]: Analyzing trace with hash -957000355, now seen corresponding path program 68 times [2022-03-03 19:46:34,934 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:34,934 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437296458] [2022-03-03 19:46:34,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:34,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:34,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:34,985 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:46:34,985 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:34,985 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437296458] [2022-03-03 19:46:34,985 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437296458] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:34,985 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706456628] [2022-03-03 19:46:34,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:46:34,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:34,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:34,992 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:46:34,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-03 19:46:35,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:46:35,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:46:35,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:46:35,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:35,088 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:46:35,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:35,143 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:46:35,143 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706456628] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:35,143 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:35,143 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-03-03 19:46:35,143 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797196150] [2022-03-03 19:46:35,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:35,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-03 19:46:35,143 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:35,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-03 19:46:35,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-03 19:46:35,144 INFO L87 Difference]: Start difference. First operand 172378 states and 661499 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:37,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:37,064 INFO L93 Difference]: Finished difference Result 180248 states and 686520 transitions. [2022-03-03 19:46:37,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 19:46:37,064 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 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 32 [2022-03-03 19:46:37,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:38,539 INFO L225 Difference]: With dead ends: 180248 [2022-03-03 19:46:38,539 INFO L226 Difference]: Without dead ends: 180232 [2022-03-03 19:46:38,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-03-03 19:46:38,540 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 112 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:38,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 95 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:46:38,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180232 states. [2022-03-03 19:46:43,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180232 to 172711. [2022-03-03 19:46:44,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172711 states, 172710 states have (on average 3.8327543280643854) internal successors, (661955), 172710 states have internal predecessors, (661955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:45,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172711 states to 172711 states and 661955 transitions. [2022-03-03 19:46:45,415 INFO L78 Accepts]: Start accepts. Automaton has 172711 states and 661955 transitions. Word has length 32 [2022-03-03 19:46:45,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:45,416 INFO L470 AbstractCegarLoop]: Abstraction has 172711 states and 661955 transitions. [2022-03-03 19:46:45,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:45,416 INFO L276 IsEmpty]: Start isEmpty. Operand 172711 states and 661955 transitions. [2022-03-03 19:46:45,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:46:45,610 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:45,610 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:45,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-03-03 19:46:45,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:45,827 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:46:45,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:45,827 INFO L85 PathProgramCache]: Analyzing trace with hash 851154315, now seen corresponding path program 69 times [2022-03-03 19:46:45,827 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:45,827 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149797574] [2022-03-03 19:46:45,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:45,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:45,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:45,860 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:46:45,860 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:45,860 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149797574] [2022-03-03 19:46:45,860 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149797574] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:45,860 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137817639] [2022-03-03 19:46:45,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:46:45,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:45,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:45,876 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:46:45,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-03 19:46:45,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 19:46:45,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:46:45,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:46:45,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:45,978 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:46:45,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:46,036 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:46:46,037 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137817639] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:46,037 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:46,037 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-03-03 19:46:46,037 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325876993] [2022-03-03 19:46:46,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:46,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 19:46:46,037 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:46,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 19:46:46,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:46:46,037 INFO L87 Difference]: Start difference. First operand 172711 states and 661955 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:48,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:48,786 INFO L93 Difference]: Finished difference Result 248684 states and 950787 transitions. [2022-03-03 19:46:48,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:46:48,787 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 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 33 [2022-03-03 19:46:48,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:50,100 INFO L225 Difference]: With dead ends: 248684 [2022-03-03 19:46:50,100 INFO L226 Difference]: Without dead ends: 246168 [2022-03-03 19:46:50,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-03-03 19:46:50,100 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 167 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:50,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 67 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:46:50,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246168 states. [2022-03-03 19:46:58,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246168 to 240164. [2022-03-03 19:46:59,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240164 states, 240163 states have (on average 3.7435783197245205) internal successors, (899069), 240163 states have internal predecessors, (899069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:01,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240164 states to 240164 states and 899069 transitions. [2022-03-03 19:47:01,170 INFO L78 Accepts]: Start accepts. Automaton has 240164 states and 899069 transitions. Word has length 33 [2022-03-03 19:47:01,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:47:01,170 INFO L470 AbstractCegarLoop]: Abstraction has 240164 states and 899069 transitions. [2022-03-03 19:47:01,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:01,170 INFO L276 IsEmpty]: Start isEmpty. Operand 240164 states and 899069 transitions. [2022-03-03 19:47:01,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:47:01,426 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:47:01,427 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:47:01,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-03-03 19:47:01,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:01,636 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:47:01,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:47:01,637 INFO L85 PathProgramCache]: Analyzing trace with hash -874131995, now seen corresponding path program 70 times [2022-03-03 19:47:01,637 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:47:01,637 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619939057] [2022-03-03 19:47:01,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:47:01,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:47:01,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:47:01,669 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:47:01,669 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:47:01,669 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619939057] [2022-03-03 19:47:01,669 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619939057] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:47:01,669 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957265377] [2022-03-03 19:47:01,670 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:47:01,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:01,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:47:01,671 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:47:01,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-03 19:47:01,734 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:47:01,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:47:01,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 19:47:01,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:47:01,788 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-03 19:47:01,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:47:01,848 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-03 19:47:01,848 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957265377] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:47:01,848 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:47:01,849 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-03-03 19:47:01,849 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466740967] [2022-03-03 19:47:01,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:47:01,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-03 19:47:01,849 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:47:01,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-03 19:47:01,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-03 19:47:01,849 INFO L87 Difference]: Start difference. First operand 240164 states and 899069 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:05,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:47:05,625 INFO L93 Difference]: Finished difference Result 366756 states and 1359341 transitions. [2022-03-03 19:47:05,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-03 19:47:05,626 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-03 19:47:05,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:47:08,625 INFO L225 Difference]: With dead ends: 366756 [2022-03-03 19:47:08,625 INFO L226 Difference]: Without dead ends: 365198 [2022-03-03 19:47:08,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-03 19:47:08,625 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 100 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:47:08,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 48 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:47:09,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365198 states. [2022-03-03 19:47:20,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365198 to 337452. [2022-03-03 19:47:21,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337452 states, 337451 states have (on average 3.7411861277637346) internal successors, (1262467), 337451 states have internal predecessors, (1262467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:24,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337452 states to 337452 states and 1262467 transitions. [2022-03-03 19:47:24,002 INFO L78 Accepts]: Start accepts. Automaton has 337452 states and 1262467 transitions. Word has length 33 [2022-03-03 19:47:24,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:47:24,003 INFO L470 AbstractCegarLoop]: Abstraction has 337452 states and 1262467 transitions. [2022-03-03 19:47:24,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:24,004 INFO L276 IsEmpty]: Start isEmpty. Operand 337452 states and 1262467 transitions. [2022-03-03 19:47:24,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:47:24,341 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:47:24,341 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:47:24,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-03-03 19:47:24,551 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,SelfDestructingSolverStorable77 [2022-03-03 19:47:24,551 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:47:24,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:47:24,552 INFO L85 PathProgramCache]: Analyzing trace with hash 257831969, now seen corresponding path program 71 times [2022-03-03 19:47:24,552 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:47:24,552 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011131358] [2022-03-03 19:47:24,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:47:24,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:47:24,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:47:24,579 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-03 19:47:24,579 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:47:24,579 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011131358] [2022-03-03 19:47:24,579 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011131358] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:47:24,579 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276047231] [2022-03-03 19:47:24,579 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:47:24,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:24,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:47:24,580 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:47:24,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-03 19:47:24,641 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 19:47:24,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:47:24,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 19:47:24,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:47:24,695 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-03 19:47:24,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:47:24,755 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-03 19:47:24,755 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276047231] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:47:24,755 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:47:24,756 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-03-03 19:47:24,756 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134123136] [2022-03-03 19:47:24,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:47:24,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-03 19:47:24,756 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:47:24,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-03 19:47:24,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-03 19:47:24,756 INFO L87 Difference]: Start difference. First operand 337452 states and 1262467 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:28,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:47:28,975 INFO L93 Difference]: Finished difference Result 366031 states and 1351232 transitions. [2022-03-03 19:47:28,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-03 19:47:28,976 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-03 19:47:28,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:47:31,407 INFO L225 Difference]: With dead ends: 366031 [2022-03-03 19:47:31,407 INFO L226 Difference]: Without dead ends: 365962 [2022-03-03 19:47:31,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:47:31,408 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 84 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:47:31,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 62 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:47:31,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365962 states. [2022-03-03 19:47:43,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365962 to 335889. [2022-03-03 19:47:44,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335889 states, 335888 states have (on average 3.7307703758395654) internal successors, (1253121), 335888 states have internal predecessors, (1253121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:48,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335889 states to 335889 states and 1253121 transitions. [2022-03-03 19:47:48,020 INFO L78 Accepts]: Start accepts. Automaton has 335889 states and 1253121 transitions. Word has length 33 [2022-03-03 19:47:48,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:47:48,020 INFO L470 AbstractCegarLoop]: Abstraction has 335889 states and 1253121 transitions. [2022-03-03 19:47:48,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:48,020 INFO L276 IsEmpty]: Start isEmpty. Operand 335889 states and 1253121 transitions. [2022-03-03 19:47:48,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:47:48,468 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:47:48,468 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:47:48,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-03-03 19:47:48,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:48,685 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:47:48,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:47:48,685 INFO L85 PathProgramCache]: Analyzing trace with hash -2021221787, now seen corresponding path program 72 times [2022-03-03 19:47:48,685 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:47:48,685 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947676081] [2022-03-03 19:47:48,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:47:48,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:47:48,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:47:48,728 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:48,729 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:47:48,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947676081] [2022-03-03 19:47:48,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947676081] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:47:48,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946755553] [2022-03-03 19:47:48,729 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:47:48,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:48,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:47:48,740 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:47:48,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-03 19:47:48,781 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:47:48,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:47:48,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 19:47:48,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:47:48,849 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:47:48,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:47:48,903 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:47:48,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946755553] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:47:48,903 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:47:48,903 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 11 [2022-03-03 19:47:48,903 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179823117] [2022-03-03 19:47:48,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:47:48,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-03 19:47:48,904 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:47:48,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-03 19:47:48,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-03-03 19:47:48,904 INFO L87 Difference]: Start difference. First operand 335889 states and 1253121 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:51,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:47:51,329 INFO L93 Difference]: Finished difference Result 174680 states and 650006 transitions. [2022-03-03 19:47:51,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:47:51,330 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-03 19:47:51,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:47:52,695 INFO L225 Difference]: With dead ends: 174680 [2022-03-03 19:47:52,695 INFO L226 Difference]: Without dead ends: 173859 [2022-03-03 19:47:52,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:47:52,696 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 216 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:47:52,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 107 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:47:52,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173859 states. [2022-03-03 19:47:57,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173859 to 158612. [2022-03-03 19:47:57,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158612 states, 158611 states have (on average 3.7746562344351906) internal successors, (598702), 158611 states have internal predecessors, (598702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:59,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158612 states to 158612 states and 598702 transitions. [2022-03-03 19:47:59,118 INFO L78 Accepts]: Start accepts. Automaton has 158612 states and 598702 transitions. Word has length 33 [2022-03-03 19:47:59,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:47:59,118 INFO L470 AbstractCegarLoop]: Abstraction has 158612 states and 598702 transitions. [2022-03-03 19:47:59,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:59,119 INFO L276 IsEmpty]: Start isEmpty. Operand 158612 states and 598702 transitions. [2022-03-03 19:47:59,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-03 19:47:59,326 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:47:59,326 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:47:59,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-03-03 19:47:59,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:59,543 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:47:59,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:47:59,544 INFO L85 PathProgramCache]: Analyzing trace with hash -657949277, now seen corresponding path program 73 times [2022-03-03 19:47:59,544 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:47:59,544 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391980340] [2022-03-03 19:47:59,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:47:59,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:47:59,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:47:59,566 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-03 19:47:59,566 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:47:59,566 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391980340] [2022-03-03 19:47:59,566 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391980340] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:47:59,566 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091494221] [2022-03-03 19:47:59,566 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:47:59,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:59,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:47:59,576 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:47:59,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-03 19:47:59,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:47:59,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:47:59,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:47:59,726 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:47:59,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:47:59,789 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:47:59,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091494221] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:47:59,789 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:47:59,790 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2022-03-03 19:47:59,790 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475560904] [2022-03-03 19:47:59,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:47:59,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-03 19:47:59,790 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:47:59,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-03 19:47:59,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-03-03 19:47:59,790 INFO L87 Difference]: Start difference. First operand 158612 states and 598702 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:48:03,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:48:03,653 INFO L93 Difference]: Finished difference Result 248922 states and 921595 transitions. [2022-03-03 19:48:03,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-03 19:48:03,653 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 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 34 [2022-03-03 19:48:03,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:48:05,643 INFO L225 Difference]: With dead ends: 248922 [2022-03-03 19:48:05,644 INFO L226 Difference]: Without dead ends: 246356 [2022-03-03 19:48:05,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=517, Invalid=1205, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:48:05,644 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 300 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 19:48:05,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 112 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-03 19:48:05,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246356 states. [2022-03-03 19:48:09,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246356 to 122359. [2022-03-03 19:48:09,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122359 states, 122358 states have (on average 3.7970218539041176) internal successors, (464596), 122358 states have internal predecessors, (464596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:48:10,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122359 states to 122359 states and 464596 transitions. [2022-03-03 19:48:10,844 INFO L78 Accepts]: Start accepts. Automaton has 122359 states and 464596 transitions. Word has length 34 [2022-03-03 19:48:10,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:48:10,844 INFO L470 AbstractCegarLoop]: Abstraction has 122359 states and 464596 transitions. [2022-03-03 19:48:10,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:48:10,844 INFO L276 IsEmpty]: Start isEmpty. Operand 122359 states and 464596 transitions. [2022-03-03 19:48:10,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-03 19:48:10,995 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:48:10,995 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:48:11,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-03-03 19:48:11,211 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,SelfDestructingSolverStorable80 [2022-03-03 19:48:11,212 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:48:11,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:48:11,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1223761653, now seen corresponding path program 74 times [2022-03-03 19:48:11,212 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:48:11,212 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990278081] [2022-03-03 19:48:11,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:48:11,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:48:11,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:48:11,243 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:48:11,244 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:48:11,244 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990278081] [2022-03-03 19:48:11,244 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990278081] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:48:11,244 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673878545] [2022-03-03 19:48:11,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:48:11,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:48:11,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:48:11,245 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:48:11,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-03 19:48:11,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:48:11,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:48:11,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:48:11,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:48:11,330 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:48:11,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:48:11,373 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:48:11,373 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673878545] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:48:11,373 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:48:11,373 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-03-03 19:48:11,373 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782147864] [2022-03-03 19:48:11,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:48:11,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-03 19:48:11,373 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:48:11,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-03 19:48:11,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-03-03 19:48:11,374 INFO L87 Difference]: Start difference. First operand 122359 states and 464596 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:48:12,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:48:12,525 INFO L93 Difference]: Finished difference Result 128866 states and 487336 transitions. [2022-03-03 19:48:12,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 19:48:12,526 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 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 35 [2022-03-03 19:48:12,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:48:13,340 INFO L225 Difference]: With dead ends: 128866 [2022-03-03 19:48:13,340 INFO L226 Difference]: Without dead ends: 128688 [2022-03-03 19:48:13,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-03-03 19:48:13,341 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 130 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:48:13,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 67 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:48:13,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128688 states. [2022-03-03 19:48:16,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128688 to 127321. [2022-03-03 19:48:16,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127321 states, 127320 states have (on average 3.7852419101476595) internal successors, (481937), 127320 states have internal predecessors, (481937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:48:17,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127321 states to 127321 states and 481937 transitions. [2022-03-03 19:48:17,485 INFO L78 Accepts]: Start accepts. Automaton has 127321 states and 481937 transitions. Word has length 35 [2022-03-03 19:48:17,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:48:17,486 INFO L470 AbstractCegarLoop]: Abstraction has 127321 states and 481937 transitions. [2022-03-03 19:48:17,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:48:17,486 INFO L276 IsEmpty]: Start isEmpty. Operand 127321 states and 481937 transitions. [2022-03-03 19:48:17,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-03 19:48:17,704 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:48:17,704 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:48:17,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-03-03 19:48:17,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:48:17,921 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:48:17,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:48:17,921 INFO L85 PathProgramCache]: Analyzing trace with hash -524603823, now seen corresponding path program 75 times [2022-03-03 19:48:17,921 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:48:17,921 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823180749] [2022-03-03 19:48:17,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:48:17,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:48:17,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:48:17,986 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:48:17,986 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:48:17,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823180749] [2022-03-03 19:48:17,986 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823180749] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:48:17,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336925255] [2022-03-03 19:48:17,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:48:17,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:48:17,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:48:18,000 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:48:18,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-03 19:48:18,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 19:48:18,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:48:18,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:48:18,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:48:18,096 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:48:18,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:48:18,163 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:48:18,164 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336925255] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:48:18,164 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:48:18,164 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 8 [2022-03-03 19:48:18,164 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765955596] [2022-03-03 19:48:18,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:48:18,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 19:48:18,164 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:48:18,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 19:48:18,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:48:18,164 INFO L87 Difference]: Start difference. First operand 127321 states and 481937 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 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) [2022-03-03 19:48:20,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:48:20,164 INFO L93 Difference]: Finished difference Result 151882 states and 564771 transitions. [2022-03-03 19:48:20,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:48:20,164 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 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 35 [2022-03-03 19:48:20,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:48:21,253 INFO L225 Difference]: With dead ends: 151882 [2022-03-03 19:48:21,253 INFO L226 Difference]: Without dead ends: 151789 [2022-03-03 19:48:21,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:48:21,254 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 93 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:48:21,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 85 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:48:21,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151789 states. [2022-03-03 19:48:24,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151789 to 141713. [2022-03-03 19:48:24,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141713 states, 141712 states have (on average 3.790561138082872) internal successors, (537168), 141712 states have internal predecessors, (537168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:48:25,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141713 states to 141713 states and 537168 transitions. [2022-03-03 19:48:25,888 INFO L78 Accepts]: Start accepts. Automaton has 141713 states and 537168 transitions. Word has length 35 [2022-03-03 19:48:25,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:48:25,889 INFO L470 AbstractCegarLoop]: Abstraction has 141713 states and 537168 transitions. [2022-03-03 19:48:25,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 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) [2022-03-03 19:48:25,889 INFO L276 IsEmpty]: Start isEmpty. Operand 141713 states and 537168 transitions. [2022-03-03 19:48:26,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-03 19:48:26,070 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:48:26,070 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:48:26,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-03-03 19:48:26,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:48:26,283 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:48:26,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:48:26,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1010926857, now seen corresponding path program 76 times [2022-03-03 19:48:26,284 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:48:26,284 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2534818] [2022-03-03 19:48:26,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:48:26,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:48:26,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:48:26,328 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:48:26,328 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:48:26,328 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2534818] [2022-03-03 19:48:26,328 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2534818] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:48:26,328 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982910439] [2022-03-03 19:48:26,328 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:48:26,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:48:26,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:48:26,330 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:48:26,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-03 19:48:26,372 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:48:26,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:48:26,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:48:26,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:48:26,457 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:48:26,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:48:26,519 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:48:26,519 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982910439] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:48:26,519 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:48:26,519 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-03-03 19:48:26,519 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160502692] [2022-03-03 19:48:26,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:48:26,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 19:48:26,520 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:48:26,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 19:48:26,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-03-03 19:48:26,520 INFO L87 Difference]: Start difference. First operand 141713 states and 537168 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:48:28,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:48:28,573 INFO L93 Difference]: Finished difference Result 162739 states and 597618 transitions. [2022-03-03 19:48:28,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-03 19:48:28,574 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 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 35 [2022-03-03 19:48:28,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:48:29,555 INFO L225 Difference]: With dead ends: 162739 [2022-03-03 19:48:29,555 INFO L226 Difference]: Without dead ends: 162639 [2022-03-03 19:48:29,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=581, Invalid=1675, Unknown=0, NotChecked=0, Total=2256 [2022-03-03 19:48:29,556 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 299 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:48:29,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 229 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 763 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:48:29,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162639 states. [2022-03-03 19:48:32,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162639 to 141374. [2022-03-03 19:48:33,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141374 states, 141373 states have (on average 3.7643538723801573) internal successors, (532178), 141373 states have internal predecessors, (532178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:48:34,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141374 states to 141374 states and 532178 transitions. [2022-03-03 19:48:34,058 INFO L78 Accepts]: Start accepts. Automaton has 141374 states and 532178 transitions. Word has length 35 [2022-03-03 19:48:34,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:48:34,058 INFO L470 AbstractCegarLoop]: Abstraction has 141374 states and 532178 transitions. [2022-03-03 19:48:34,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:48:34,058 INFO L276 IsEmpty]: Start isEmpty. Operand 141374 states and 532178 transitions. [2022-03-03 19:48:34,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-03 19:48:34,250 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:48:34,250 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:48:34,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-03-03 19:48:34,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:48:34,466 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:48:34,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:48:34,466 INFO L85 PathProgramCache]: Analyzing trace with hash 47340655, now seen corresponding path program 77 times [2022-03-03 19:48:34,466 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:48:34,466 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187335024] [2022-03-03 19:48:34,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:48:34,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:48:34,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:48:34,843 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:48:34,843 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:48:34,843 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187335024] [2022-03-03 19:48:34,844 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187335024] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:48:34,844 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980208241] [2022-03-03 19:48:34,844 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:48:34,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:48:34,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:48:34,845 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:48:34,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-03 19:48:34,888 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 19:48:34,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:48:34,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 54 conjunts are in the unsatisfiable core [2022-03-03 19:48:34,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:48:35,150 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-03-03 19:48:35,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:35,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 35 [2022-03-03 19:48:35,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 39 [2022-03-03 19:48:35,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-03-03 19:48:35,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2022-03-03 19:48:35,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-03-03 19:48:35,838 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:48:35,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:48:36,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:36,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:36,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:36,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42254 treesize of output 39694