/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-bad/three-array-sum-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 15:12:20,920 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 15:12:20,922 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 15:12:20,946 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-06 15:12:20,991 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 [2021-08-06 15:12:21,019 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 15:12:21,020 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 15:12:21,021 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-06 15:12:21,021 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-06 15:12:21,023 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 15:12:21,024 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 15:12:21,024 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 15:12:21,024 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 15:12:21,024 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 15:12:21,024 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 15:12:21,025 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 15:12:21,025 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 15:12:21,025 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 15:12:21,026 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 15:12:21,026 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 15:12:21,026 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 15:12:21,026 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 15:12:21,026 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 15:12:21,026 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 15:12:21,026 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 15:12:21,027 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 15:12:21,027 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 15:12:21,027 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 15:12:21,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 15:12:21,027 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 15:12:21,027 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 15:12:21,027 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 15:12:21,028 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 15:12:21,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 15:12:21,028 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 15:12:21,028 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 15:12:21,028 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 15:12:21,341 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 15:12:21,357 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 15:12:21,359 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 15:12:21,360 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-06 15:12:21,361 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-06 15:12:21,363 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/three-array-sum-alt.wvr.bpl [2021-08-06 15:12:21,363 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/three-array-sum-alt.wvr.bpl' [2021-08-06 15:12:21,407 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 15:12:21,408 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-06 15:12:21,409 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 15:12:21,409 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 15:12:21,409 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 15:12:21,419 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:12:21" (1/1) ... [2021-08-06 15:12:21,426 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:12:21" (1/1) ... [2021-08-06 15:12:21,437 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 15:12:21,438 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 15:12:21,439 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 15:12:21,440 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 15:12:21,446 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:12:21" (1/1) ... [2021-08-06 15:12:21,447 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:12:21" (1/1) ... [2021-08-06 15:12:21,448 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:12:21" (1/1) ... [2021-08-06 15:12:21,449 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:12:21" (1/1) ... [2021-08-06 15:12:21,453 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:12:21" (1/1) ... [2021-08-06 15:12:21,457 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:12:21" (1/1) ... [2021-08-06 15:12:21,458 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:12:21" (1/1) ... [2021-08-06 15:12:21,463 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 15:12:21,464 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 15:12:21,464 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 15:12:21,464 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 15:12:21,466 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:12:21" (1/1) ... [2021-08-06 15:12:21,473 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 15:12:21,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:21,493 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) [2021-08-06 15:12:21,499 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 [2021-08-06 15:12:21,524 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-06 15:12:21,524 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-06 15:12:21,524 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-06 15:12:21,524 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-06 15:12:21,524 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-06 15:12:21,525 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-06 15:12:21,525 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-06 15:12:21,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 15:12:21,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 15:12:21,525 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-06 15:12:21,525 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-06 15:12:21,525 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-06 15:12:21,526 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-06 15:12:21,768 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 15:12:21,768 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-06 15:12:21,770 INFO L202 PluginConnector]: Adding new model three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 03:12:21 BoogieIcfgContainer [2021-08-06 15:12:21,770 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 15:12:21,772 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 15:12:21,772 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 15:12:21,774 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 15:12:21,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:12:21" (1/2) ... [2021-08-06 15:12:21,775 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b7df51 and model type three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 03:12:21, skipping insertion in model container [2021-08-06 15:12:21,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 03:12:21" (2/2) ... [2021-08-06 15:12:21,776 INFO L111 eAbstractionObserver]: Analyzing ICFG three-array-sum-alt.wvr.bpl [2021-08-06 15:12:21,780 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 15:12:21,780 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 15:12:21,793 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 15:12:21,793 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 15:12:21,866 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-06 15:12:21,916 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 15:12:21,925 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, mConcurrency=FINITE_AUTOMATA, 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 [2021-08-06 15:12:21,925 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-06 15:12:21,937 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 34 places, 27 transitions, 78 flow [2021-08-06 15:12:21,971 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 110 states, 109 states have (on average 2.8440366972477062) internal successors, (310), 109 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:21,974 INFO L276 IsEmpty]: Start isEmpty. Operand has 110 states, 109 states have (on average 2.8440366972477062) internal successors, (310), 109 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:21,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 15:12:21,986 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:21,987 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:21,988 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:12:21,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:21,995 INFO L82 PathProgramCache]: Analyzing trace with hash -511251252, now seen corresponding path program 1 times [2021-08-06 15:12:22,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:22,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275409639] [2021-08-06 15:12:22,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:22,004 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:22,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:22,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:22,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:22,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275409639] [2021-08-06 15:12:22,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275409639] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:12:22,304 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:12:22,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-06 15:12:22,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315519956] [2021-08-06 15:12:22,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 15:12:22,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:22,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 15:12:22,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 15:12:22,321 INFO L87 Difference]: Start difference. First operand has 110 states, 109 states have (on average 2.8440366972477062) internal successors, (310), 109 states have internal predecessors, (310), 0 states have call successors, (0), 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) [2021-08-06 15:12:22,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:22,349 INFO L93 Difference]: Finished difference Result 215 states and 615 transitions. [2021-08-06 15:12:22,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 15:12:22,350 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 [2021-08-06 15:12:22,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:22,361 INFO L225 Difference]: With dead ends: 215 [2021-08-06 15:12:22,361 INFO L226 Difference]: Without dead ends: 200 [2021-08-06 15:12:22,362 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 15:12:22,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-08-06 15:12:22,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 147. [2021-08-06 15:12:22,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.856164383561644) internal successors, (417), 146 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:22,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 417 transitions. [2021-08-06 15:12:22,411 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 417 transitions. Word has length 16 [2021-08-06 15:12:22,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:22,412 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 417 transitions. [2021-08-06 15:12:22,412 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) [2021-08-06 15:12:22,412 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 417 transitions. [2021-08-06 15:12:22,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 15:12:22,414 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:22,414 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:22,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 15:12:22,414 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:12:22,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:22,415 INFO L82 PathProgramCache]: Analyzing trace with hash 74019820, now seen corresponding path program 1 times [2021-08-06 15:12:22,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:22,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127183870] [2021-08-06 15:12:22,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:22,416 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:22,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:22,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:22,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:22,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127183870] [2021-08-06 15:12:22,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127183870] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:22,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743278573] [2021-08-06 15:12:22,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:22,467 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:22,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:22,469 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) [2021-08-06 15:12:22,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-06 15:12:22,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:22,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-06 15:12:22,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:22,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:22,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743278573] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:22,760 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:22,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-08-06 15:12:22,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936945238] [2021-08-06 15:12:22,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 15:12:22,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:22,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 15:12:22,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-06 15:12:22,769 INFO L87 Difference]: Start difference. First operand 147 states and 417 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:22,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:22,866 INFO L93 Difference]: Finished difference Result 345 states and 956 transitions. [2021-08-06 15:12:22,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 15:12:22,867 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-08-06 15:12:22,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:22,871 INFO L225 Difference]: With dead ends: 345 [2021-08-06 15:12:22,872 INFO L226 Difference]: Without dead ends: 345 [2021-08-06 15:12:22,873 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 27.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-06 15:12:22,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-08-06 15:12:22,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 174. [2021-08-06 15:12:22,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.953757225433526) internal successors, (511), 173 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:22,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 511 transitions. [2021-08-06 15:12:22,902 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 511 transitions. Word has length 18 [2021-08-06 15:12:22,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:22,903 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 511 transitions. [2021-08-06 15:12:22,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:22,903 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 511 transitions. [2021-08-06 15:12:22,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 15:12:22,905 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:22,905 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:22,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-06 15:12:23,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:23,128 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:12:23,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:23,128 INFO L82 PathProgramCache]: Analyzing trace with hash 132722862, now seen corresponding path program 1 times [2021-08-06 15:12:23,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:23,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787693410] [2021-08-06 15:12:23,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:23,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:23,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:23,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:23,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:23,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787693410] [2021-08-06 15:12:23,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787693410] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:12:23,158 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:12:23,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 15:12:23,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159597233] [2021-08-06 15:12:23,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 15:12:23,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:23,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 15:12:23,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 15:12:23,162 INFO L87 Difference]: Start difference. First operand 174 states and 511 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) [2021-08-06 15:12:23,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:23,207 INFO L93 Difference]: Finished difference Result 242 states and 652 transitions. [2021-08-06 15:12:23,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 15:12:23,207 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 [2021-08-06 15:12:23,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:23,210 INFO L225 Difference]: With dead ends: 242 [2021-08-06 15:12:23,210 INFO L226 Difference]: Without dead ends: 232 [2021-08-06 15:12:23,210 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 15:12:23,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-08-06 15:12:23,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 190. [2021-08-06 15:12:23,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.8412698412698414) internal successors, (537), 189 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:23,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 537 transitions. [2021-08-06 15:12:23,226 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 537 transitions. Word has length 18 [2021-08-06 15:12:23,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:23,226 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 537 transitions. [2021-08-06 15:12:23,226 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) [2021-08-06 15:12:23,226 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 537 transitions. [2021-08-06 15:12:23,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 15:12:23,228 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:23,228 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:23,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-06 15:12:23,228 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:12:23,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:23,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1683104426, now seen corresponding path program 1 times [2021-08-06 15:12:23,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:23,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394887071] [2021-08-06 15:12:23,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:23,230 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:23,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:23,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:23,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:23,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394887071] [2021-08-06 15:12:23,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394887071] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:12:23,268 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:12:23,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 15:12:23,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809682779] [2021-08-06 15:12:23,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 15:12:23,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:23,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 15:12:23,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 15:12:23,271 INFO L87 Difference]: Start difference. First operand 190 states and 537 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) [2021-08-06 15:12:23,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:23,316 INFO L93 Difference]: Finished difference Result 325 states and 890 transitions. [2021-08-06 15:12:23,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 15:12:23,316 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 [2021-08-06 15:12:23,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:23,319 INFO L225 Difference]: With dead ends: 325 [2021-08-06 15:12:23,319 INFO L226 Difference]: Without dead ends: 307 [2021-08-06 15:12:23,319 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 15:12:23,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-08-06 15:12:23,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 235. [2021-08-06 15:12:23,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.893162393162393) internal successors, (677), 234 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:23,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 677 transitions. [2021-08-06 15:12:23,333 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 677 transitions. Word has length 18 [2021-08-06 15:12:23,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:23,334 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 677 transitions. [2021-08-06 15:12:23,334 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) [2021-08-06 15:12:23,334 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 677 transitions. [2021-08-06 15:12:23,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 15:12:23,337 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:23,337 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:23,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-06 15:12:23,337 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:12:23,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:23,338 INFO L82 PathProgramCache]: Analyzing trace with hash 105060458, now seen corresponding path program 2 times [2021-08-06 15:12:23,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:23,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924564040] [2021-08-06 15:12:23,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:23,341 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:23,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:23,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:23,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:23,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924564040] [2021-08-06 15:12:23,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924564040] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:12:23,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:12:23,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 15:12:23,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378621946] [2021-08-06 15:12:23,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 15:12:23,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:23,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 15:12:23,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 15:12:23,402 INFO L87 Difference]: Start difference. First operand 235 states and 677 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) [2021-08-06 15:12:23,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:23,443 INFO L93 Difference]: Finished difference Result 277 states and 750 transitions. [2021-08-06 15:12:23,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 15:12:23,443 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 [2021-08-06 15:12:23,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:23,445 INFO L225 Difference]: With dead ends: 277 [2021-08-06 15:12:23,445 INFO L226 Difference]: Without dead ends: 265 [2021-08-06 15:12:23,445 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 13.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 15:12:23,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-08-06 15:12:23,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 212. [2021-08-06 15:12:23,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.8341232227488153) internal successors, (598), 211 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:23,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 598 transitions. [2021-08-06 15:12:23,471 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 598 transitions. Word has length 18 [2021-08-06 15:12:23,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:23,472 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 598 transitions. [2021-08-06 15:12:23,472 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) [2021-08-06 15:12:23,472 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 598 transitions. [2021-08-06 15:12:23,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 15:12:23,473 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:23,474 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:23,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-06 15:12:23,474 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:12:23,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:23,475 INFO L82 PathProgramCache]: Analyzing trace with hash 671200524, now seen corresponding path program 2 times [2021-08-06 15:12:23,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:23,475 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987498457] [2021-08-06 15:12:23,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:23,475 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:23,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:23,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:23,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:23,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987498457] [2021-08-06 15:12:23,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987498457] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:12:23,526 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:12:23,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 15:12:23,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335844590] [2021-08-06 15:12:23,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 15:12:23,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:23,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 15:12:23,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 15:12:23,528 INFO L87 Difference]: Start difference. First operand 212 states and 598 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) [2021-08-06 15:12:23,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:23,578 INFO L93 Difference]: Finished difference Result 275 states and 762 transitions. [2021-08-06 15:12:23,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 15:12:23,585 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 [2021-08-06 15:12:23,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:23,587 INFO L225 Difference]: With dead ends: 275 [2021-08-06 15:12:23,587 INFO L226 Difference]: Without dead ends: 261 [2021-08-06 15:12:23,587 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 15:12:23,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-08-06 15:12:23,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 215. [2021-08-06 15:12:23,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.850467289719626) internal successors, (610), 214 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:23,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 610 transitions. [2021-08-06 15:12:23,596 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 610 transitions. Word has length 18 [2021-08-06 15:12:23,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:23,596 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 610 transitions. [2021-08-06 15:12:23,596 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) [2021-08-06 15:12:23,597 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 610 transitions. [2021-08-06 15:12:23,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 15:12:23,598 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:23,598 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:23,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-06 15:12:23,598 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:12:23,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:23,602 INFO L82 PathProgramCache]: Analyzing trace with hash -945431028, now seen corresponding path program 3 times [2021-08-06 15:12:23,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:23,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2629100] [2021-08-06 15:12:23,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:23,602 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:23,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:23,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:23,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:23,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2629100] [2021-08-06 15:12:23,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2629100] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:12:23,688 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:12:23,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 15:12:23,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570886980] [2021-08-06 15:12:23,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 15:12:23,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:23,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 15:12:23,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-06 15:12:23,689 INFO L87 Difference]: Start difference. First operand 215 states and 610 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) [2021-08-06 15:12:23,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:23,717 INFO L93 Difference]: Finished difference Result 222 states and 635 transitions. [2021-08-06 15:12:23,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 15:12:23,718 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 [2021-08-06 15:12:23,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:23,720 INFO L225 Difference]: With dead ends: 222 [2021-08-06 15:12:23,720 INFO L226 Difference]: Without dead ends: 222 [2021-08-06 15:12:23,720 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-06 15:12:23,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-08-06 15:12:23,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 213. [2021-08-06 15:12:23,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.8679245283018866) internal successors, (608), 212 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:23,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 608 transitions. [2021-08-06 15:12:23,727 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 608 transitions. Word has length 18 [2021-08-06 15:12:23,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:23,728 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 608 transitions. [2021-08-06 15:12:23,728 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) [2021-08-06 15:12:23,728 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 608 transitions. [2021-08-06 15:12:23,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 15:12:23,729 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:23,729 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:23,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-06 15:12:23,729 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:12:23,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:23,730 INFO L82 PathProgramCache]: Analyzing trace with hash -2121095062, now seen corresponding path program 4 times [2021-08-06 15:12:23,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:23,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285763852] [2021-08-06 15:12:23,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:23,730 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:23,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:23,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:23,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:23,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285763852] [2021-08-06 15:12:23,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285763852] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:12:23,816 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:12:23,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 15:12:23,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108082645] [2021-08-06 15:12:23,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 15:12:23,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:23,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 15:12:23,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-06 15:12:23,818 INFO L87 Difference]: Start difference. First operand 213 states and 608 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) [2021-08-06 15:12:23,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:23,850 INFO L93 Difference]: Finished difference Result 226 states and 656 transitions. [2021-08-06 15:12:23,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 15:12:23,850 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 [2021-08-06 15:12:23,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:23,852 INFO L225 Difference]: With dead ends: 226 [2021-08-06 15:12:23,852 INFO L226 Difference]: Without dead ends: 226 [2021-08-06 15:12:23,852 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-06 15:12:23,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-08-06 15:12:23,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 215. [2021-08-06 15:12:23,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.911214953271028) internal successors, (623), 214 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:23,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 623 transitions. [2021-08-06 15:12:23,859 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 623 transitions. Word has length 18 [2021-08-06 15:12:23,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:23,859 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 623 transitions. [2021-08-06 15:12:23,859 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) [2021-08-06 15:12:23,859 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 623 transitions. [2021-08-06 15:12:23,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 15:12:23,860 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:23,860 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:23,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-06 15:12:23,861 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:12:23,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:23,861 INFO L82 PathProgramCache]: Analyzing trace with hash -552220694, now seen corresponding path program 5 times [2021-08-06 15:12:23,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:23,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052171754] [2021-08-06 15:12:23,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:23,862 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:23,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:23,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:23,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:23,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052171754] [2021-08-06 15:12:23,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052171754] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:12:23,915 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:12:23,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 15:12:23,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151603980] [2021-08-06 15:12:23,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 15:12:23,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:23,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 15:12:23,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 15:12:23,916 INFO L87 Difference]: Start difference. First operand 215 states and 623 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) [2021-08-06 15:12:23,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:23,958 INFO L93 Difference]: Finished difference Result 212 states and 606 transitions. [2021-08-06 15:12:23,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 15:12:23,959 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 [2021-08-06 15:12:23,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:23,963 INFO L225 Difference]: With dead ends: 212 [2021-08-06 15:12:23,964 INFO L226 Difference]: Without dead ends: 204 [2021-08-06 15:12:23,964 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 18.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 15:12:23,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-08-06 15:12:23,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 194. [2021-08-06 15:12:23,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.901554404145078) internal successors, (560), 193 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:23,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 560 transitions. [2021-08-06 15:12:23,969 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 560 transitions. Word has length 18 [2021-08-06 15:12:23,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:23,970 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 560 transitions. [2021-08-06 15:12:23,970 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) [2021-08-06 15:12:23,970 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 560 transitions. [2021-08-06 15:12:23,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 15:12:23,971 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:23,971 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:23,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-06 15:12:23,971 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:12:23,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:23,972 INFO L82 PathProgramCache]: Analyzing trace with hash -62492722, now seen corresponding path program 1 times [2021-08-06 15:12:23,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:23,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427555476] [2021-08-06 15:12:23,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:23,972 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:23,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:24,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:12:24,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:24,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427555476] [2021-08-06 15:12:24,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427555476] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:24,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443827317] [2021-08-06 15:12:24,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:24,046 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:24,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:24,049 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) [2021-08-06 15:12:24,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-06 15:12:24,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:24,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-06 15:12:24,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:24,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:12:24,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443827317] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:24,236 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:24,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-08-06 15:12:24,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024556304] [2021-08-06 15:12:24,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 15:12:24,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:24,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 15:12:24,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-06 15:12:24,237 INFO L87 Difference]: Start difference. First operand 194 states and 560 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:24,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:24,288 INFO L93 Difference]: Finished difference Result 251 states and 729 transitions. [2021-08-06 15:12:24,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 15:12:24,289 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have 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 [2021-08-06 15:12:24,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:24,292 INFO L225 Difference]: With dead ends: 251 [2021-08-06 15:12:24,292 INFO L226 Difference]: Without dead ends: 251 [2021-08-06 15:12:24,292 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 30.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-06 15:12:24,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-08-06 15:12:24,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 191. [2021-08-06 15:12:24,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.9) internal successors, (551), 190 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:24,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 551 transitions. [2021-08-06 15:12:24,298 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 551 transitions. Word has length 20 [2021-08-06 15:12:24,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:24,298 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 551 transitions. [2021-08-06 15:12:24,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:24,299 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 551 transitions. [2021-08-06 15:12:24,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 15:12:24,300 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:24,300 INFO L512 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] [2021-08-06 15:12:24,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-06 15:12:24,528 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,SelfDestructingSolverStorable9 [2021-08-06 15:12:24,528 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:12:24,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:24,529 INFO L82 PathProgramCache]: Analyzing trace with hash -851645140, now seen corresponding path program 1 times [2021-08-06 15:12:24,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:24,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090986153] [2021-08-06 15:12:24,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:24,529 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:24,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:24,654 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:24,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:24,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090986153] [2021-08-06 15:12:24,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090986153] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:24,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045483303] [2021-08-06 15:12:24,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:24,655 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:24,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:24,669 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) [2021-08-06 15:12:24,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-06 15:12:24,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:24,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:12:24,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:25,241 INFO L388 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 [2021-08-06 15:12:25,243 INFO L388 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 [2021-08-06 15:12:25,310 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:25,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045483303] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:25,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:25,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-06 15:12:25,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145573863] [2021-08-06 15:12:25,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 15:12:25,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:25,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 15:12:25,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-06 15:12:25,312 INFO L87 Difference]: Start difference. First operand 191 states and 551 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:25,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:25,408 INFO L93 Difference]: Finished difference Result 377 states and 1096 transitions. [2021-08-06 15:12:25,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 15:12:25,409 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 15:12:25,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:25,411 INFO L225 Difference]: With dead ends: 377 [2021-08-06 15:12:25,411 INFO L226 Difference]: Without dead ends: 362 [2021-08-06 15:12:25,411 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 69.2ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-06 15:12:25,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-08-06 15:12:25,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 270. [2021-08-06 15:12:25,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.95910780669145) internal successors, (796), 269 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:25,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 796 transitions. [2021-08-06 15:12:25,419 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 796 transitions. Word has length 22 [2021-08-06 15:12:25,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:25,419 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 796 transitions. [2021-08-06 15:12:25,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:25,419 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 796 transitions. [2021-08-06 15:12:25,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 15:12:25,420 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:25,420 INFO L512 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] [2021-08-06 15:12:25,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-06 15:12:25,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:25,641 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:12:25,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:25,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1414924140, now seen corresponding path program 2 times [2021-08-06 15:12:25,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:25,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826643750] [2021-08-06 15:12:25,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:25,642 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:25,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:25,779 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:25,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:25,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826643750] [2021-08-06 15:12:25,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826643750] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:25,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056177767] [2021-08-06 15:12:25,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:12:25,780 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:25,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:25,781 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) [2021-08-06 15:12:25,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-06 15:12:25,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:12:25,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:12:25,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:12:25,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:26,272 INFO L388 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 [2021-08-06 15:12:26,300 INFO L388 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 [2021-08-06 15:12:26,408 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:26,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056177767] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:26,409 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:26,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-06 15:12:26,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301468897] [2021-08-06 15:12:26,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 15:12:26,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:26,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 15:12:26,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-06 15:12:26,410 INFO L87 Difference]: Start difference. First operand 270 states and 796 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:26,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:26,507 INFO L93 Difference]: Finished difference Result 402 states and 1185 transitions. [2021-08-06 15:12:26,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 15:12:26,508 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 15:12:26,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:26,510 INFO L225 Difference]: With dead ends: 402 [2021-08-06 15:12:26,510 INFO L226 Difference]: Without dead ends: 387 [2021-08-06 15:12:26,511 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 66.6ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-06 15:12:26,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-08-06 15:12:26,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 294. [2021-08-06 15:12:26,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.962457337883959) internal successors, (868), 293 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:26,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 868 transitions. [2021-08-06 15:12:26,522 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 868 transitions. Word has length 22 [2021-08-06 15:12:26,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:26,523 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 868 transitions. [2021-08-06 15:12:26,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:26,523 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 868 transitions. [2021-08-06 15:12:26,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 15:12:26,525 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:26,525 INFO L512 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] [2021-08-06 15:12:26,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-06 15:12:26,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:26,749 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:12:26,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:26,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1944109140, now seen corresponding path program 3 times [2021-08-06 15:12:26,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:26,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145265583] [2021-08-06 15:12:26,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:26,750 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:26,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:26,869 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:26,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:26,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145265583] [2021-08-06 15:12:26,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145265583] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:26,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807339719] [2021-08-06 15:12:26,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:12:26,870 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:26,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:26,873 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) [2021-08-06 15:12:26,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-06 15:12:27,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 15:12:27,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:12:27,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:12:27,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:27,472 INFO L388 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 25 treesize of output 19 [2021-08-06 15:12:27,476 INFO L388 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 [2021-08-06 15:12:27,538 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:27,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807339719] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:27,539 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:27,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-06 15:12:27,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841746651] [2021-08-06 15:12:27,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 15:12:27,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:27,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 15:12:27,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 15:12:27,540 INFO L87 Difference]: Start difference. First operand 294 states and 868 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) [2021-08-06 15:12:27,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:27,624 INFO L93 Difference]: Finished difference Result 461 states and 1361 transitions. [2021-08-06 15:12:27,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 15:12:27,624 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 22 [2021-08-06 15:12:27,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:27,627 INFO L225 Difference]: With dead ends: 461 [2021-08-06 15:12:27,627 INFO L226 Difference]: Without dead ends: 446 [2021-08-06 15:12:27,627 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 62.3ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 15:12:27,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-08-06 15:12:27,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 312. [2021-08-06 15:12:27,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.964630225080386) internal successors, (922), 311 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:27,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 922 transitions. [2021-08-06 15:12:27,645 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 922 transitions. Word has length 22 [2021-08-06 15:12:27,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:27,645 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 922 transitions. [2021-08-06 15:12:27,646 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) [2021-08-06 15:12:27,646 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 922 transitions. [2021-08-06 15:12:27,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 15:12:27,647 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:27,647 INFO L512 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] [2021-08-06 15:12:27,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-06 15:12:27,860 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,SelfDestructingSolverStorable12 [2021-08-06 15:12:27,861 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:12:27,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:27,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1813144784, now seen corresponding path program 4 times [2021-08-06 15:12:27,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:27,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512282806] [2021-08-06 15:12:27,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:27,862 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:27,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:27,984 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:27,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:27,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512282806] [2021-08-06 15:12:27,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512282806] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:27,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190911336] [2021-08-06 15:12:27,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:12:27,985 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:27,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:27,986 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) [2021-08-06 15:12:28,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-06 15:12:28,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:12:28,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:12:28,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:12:28,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:28,502 INFO L388 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 25 treesize of output 19 [2021-08-06 15:12:28,528 INFO L388 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 [2021-08-06 15:12:28,648 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:28,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190911336] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:28,648 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:28,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-06 15:12:28,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907706248] [2021-08-06 15:12:28,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 15:12:28,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:28,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 15:12:28,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-06 15:12:28,650 INFO L87 Difference]: Start difference. First operand 312 states and 922 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:28,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:28,713 INFO L93 Difference]: Finished difference Result 435 states and 1285 transitions. [2021-08-06 15:12:28,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 15:12:28,714 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 15:12:28,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:28,716 INFO L225 Difference]: With dead ends: 435 [2021-08-06 15:12:28,716 INFO L226 Difference]: Without dead ends: 420 [2021-08-06 15:12:28,716 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 49.7ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-06 15:12:28,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-08-06 15:12:28,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 330. [2021-08-06 15:12:28,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.966565349544073) internal successors, (976), 329 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:28,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 976 transitions. [2021-08-06 15:12:28,725 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 976 transitions. Word has length 22 [2021-08-06 15:12:28,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:28,725 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 976 transitions. [2021-08-06 15:12:28,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:28,725 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 976 transitions. [2021-08-06 15:12:28,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 15:12:28,726 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:28,726 INFO L512 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] [2021-08-06 15:12:28,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-06 15:12:28,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:28,949 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:12:28,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:28,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1947787600, now seen corresponding path program 5 times [2021-08-06 15:12:28,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:28,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022265982] [2021-08-06 15:12:28,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:28,950 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:28,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:29,056 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:29,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:29,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022265982] [2021-08-06 15:12:29,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022265982] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:29,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964993187] [2021-08-06 15:12:29,057 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:12:29,057 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:29,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:29,058 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) [2021-08-06 15:12:29,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-06 15:12:29,249 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:12:29,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:12:29,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:12:29,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:29,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-08-06 15:12:29,590 INFO L388 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 [2021-08-06 15:12:29,681 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:29,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964993187] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:29,682 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:29,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-06 15:12:29,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597443970] [2021-08-06 15:12:29,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 15:12:29,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:29,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 15:12:29,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-06 15:12:29,683 INFO L87 Difference]: Start difference. First operand 330 states and 976 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:29,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:29,755 INFO L93 Difference]: Finished difference Result 471 states and 1393 transitions. [2021-08-06 15:12:29,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 15:12:29,755 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 15:12:29,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:29,757 INFO L225 Difference]: With dead ends: 471 [2021-08-06 15:12:29,758 INFO L226 Difference]: Without dead ends: 456 [2021-08-06 15:12:29,758 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 65.6ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-06 15:12:29,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-08-06 15:12:29,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 342. [2021-08-06 15:12:29,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.967741935483871) internal successors, (1012), 341 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:29,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1012 transitions. [2021-08-06 15:12:29,766 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1012 transitions. Word has length 22 [2021-08-06 15:12:29,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:29,767 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 1012 transitions. [2021-08-06 15:12:29,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:29,767 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1012 transitions. [2021-08-06 15:12:29,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 15:12:29,768 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:29,768 INFO L512 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] [2021-08-06 15:12:29,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-06 15:12:29,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:29,991 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:12:29,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:29,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1359688084, now seen corresponding path program 6 times [2021-08-06 15:12:29,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:29,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366962344] [2021-08-06 15:12:29,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:29,992 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:30,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:30,101 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:30,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:30,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366962344] [2021-08-06 15:12:30,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366962344] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:30,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927236979] [2021-08-06 15:12:30,102 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:12:30,102 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:30,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:30,104 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) [2021-08-06 15:12:30,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-06 15:12:30,351 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 15:12:30,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:12:30,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:12:30,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:30,646 INFO L388 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 [2021-08-06 15:12:30,669 INFO L388 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 [2021-08-06 15:12:30,798 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:30,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927236979] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:30,798 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:30,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-06 15:12:30,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575071978] [2021-08-06 15:12:30,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 15:12:30,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:30,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 15:12:30,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 15:12:30,799 INFO L87 Difference]: Start difference. First operand 342 states and 1012 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:30,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:30,875 INFO L93 Difference]: Finished difference Result 463 states and 1369 transitions. [2021-08-06 15:12:30,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 15:12:30,876 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 15:12:30,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:30,878 INFO L225 Difference]: With dead ends: 463 [2021-08-06 15:12:30,878 INFO L226 Difference]: Without dead ends: 448 [2021-08-06 15:12:30,879 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 61.2ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 15:12:30,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-08-06 15:12:30,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 342. [2021-08-06 15:12:30,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.967741935483871) internal successors, (1012), 341 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:30,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1012 transitions. [2021-08-06 15:12:30,887 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1012 transitions. Word has length 22 [2021-08-06 15:12:30,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:30,887 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 1012 transitions. [2021-08-06 15:12:30,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:30,887 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1012 transitions. [2021-08-06 15:12:30,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:12:30,888 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:30,888 INFO L512 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] [2021-08-06 15:12:30,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-06 15:12:31,104 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,SelfDestructingSolverStorable15 [2021-08-06 15:12:31,105 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:12:31,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:31,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1997398602, now seen corresponding path program 7 times [2021-08-06 15:12:31,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:31,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266208490] [2021-08-06 15:12:31,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:31,106 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:31,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:31,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:12:31,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:31,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266208490] [2021-08-06 15:12:31,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266208490] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:31,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384689021] [2021-08-06 15:12:31,161 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:12:31,161 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:31,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:31,162 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) [2021-08-06 15:12:31,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-06 15:12:31,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:31,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 15:12:31,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:31,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:12:31,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384689021] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:31,564 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:31,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-06 15:12:31,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693837191] [2021-08-06 15:12:31,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 15:12:31,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:31,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 15:12:31,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-06 15:12:31,565 INFO L87 Difference]: Start difference. First operand 342 states and 1012 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) [2021-08-06 15:12:31,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:31,659 INFO L93 Difference]: Finished difference Result 800 states and 2293 transitions. [2021-08-06 15:12:31,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 15:12:31,660 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 24 [2021-08-06 15:12:31,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:31,664 INFO L225 Difference]: With dead ends: 800 [2021-08-06 15:12:31,664 INFO L226 Difference]: Without dead ends: 800 [2021-08-06 15:12:31,664 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 47.3ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:12:31,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2021-08-06 15:12:31,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 428. [2021-08-06 15:12:31,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 3.0960187353629975) internal successors, (1322), 427 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:31,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 1322 transitions. [2021-08-06 15:12:31,677 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 1322 transitions. Word has length 24 [2021-08-06 15:12:31,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:31,677 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 1322 transitions. [2021-08-06 15:12:31,678 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) [2021-08-06 15:12:31,678 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 1322 transitions. [2021-08-06 15:12:31,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:12:31,679 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:31,679 INFO L512 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] [2021-08-06 15:12:31,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-06 15:12:31,897 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,SelfDestructingSolverStorable16 [2021-08-06 15:12:31,898 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:12:31,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:31,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1419061262, now seen corresponding path program 8 times [2021-08-06 15:12:31,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:31,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396663380] [2021-08-06 15:12:31,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:31,898 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:31,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:31,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:12:31,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:31,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396663380] [2021-08-06 15:12:31,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396663380] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:31,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324795190] [2021-08-06 15:12:31,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:12:31,933 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:31,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:31,934 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) [2021-08-06 15:12:31,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-06 15:12:32,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:12:32,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:12:32,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 15:12:32,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:32,341 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:12:32,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324795190] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:32,342 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:32,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-06 15:12:32,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566786887] [2021-08-06 15:12:32,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 15:12:32,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:32,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 15:12:32,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-06 15:12:32,343 INFO L87 Difference]: Start difference. First operand 428 states and 1322 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) [2021-08-06 15:12:32,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:32,819 INFO L93 Difference]: Finished difference Result 1302 states and 3896 transitions. [2021-08-06 15:12:32,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 15:12:32,820 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 24 [2021-08-06 15:12:32,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:32,826 INFO L225 Difference]: With dead ends: 1302 [2021-08-06 15:12:32,826 INFO L226 Difference]: Without dead ends: 1252 [2021-08-06 15:12:32,827 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 254.1ms TimeCoverageRelationStatistics Valid=258, Invalid=798, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 15:12:32,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1252 states. [2021-08-06 15:12:32,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1252 to 716. [2021-08-06 15:12:32,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 3.2363636363636363) internal successors, (2314), 715 states have internal predecessors, (2314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:32,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 2314 transitions. [2021-08-06 15:12:32,848 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 2314 transitions. Word has length 24 [2021-08-06 15:12:32,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:32,848 INFO L470 AbstractCegarLoop]: Abstraction has 716 states and 2314 transitions. [2021-08-06 15:12:32,849 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) [2021-08-06 15:12:32,849 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 2314 transitions. [2021-08-06 15:12:32,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:12:32,850 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:32,851 INFO L512 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] [2021-08-06 15:12:32,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-06 15:12:33,064 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,SelfDestructingSolverStorable17 [2021-08-06 15:12:33,065 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:12:33,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:33,065 INFO L82 PathProgramCache]: Analyzing trace with hash 982092554, now seen corresponding path program 9 times [2021-08-06 15:12:33,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:33,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486671245] [2021-08-06 15:12:33,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:33,065 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:33,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:33,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:12:33,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:33,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486671245] [2021-08-06 15:12:33,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486671245] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:33,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090693575] [2021-08-06 15:12:33,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:12:33,103 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:33,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:33,103 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) [2021-08-06 15:12:33,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-06 15:12:33,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:12:33,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:12:33,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 15:12:33,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:33,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:12:33,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090693575] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:33,546 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:33,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-06 15:12:33,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84492536] [2021-08-06 15:12:33,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 15:12:33,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:33,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 15:12:33,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-06 15:12:33,548 INFO L87 Difference]: Start difference. First operand 716 states and 2314 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) [2021-08-06 15:12:33,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:33,638 INFO L93 Difference]: Finished difference Result 1440 states and 4507 transitions. [2021-08-06 15:12:33,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 15:12:33,639 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 24 [2021-08-06 15:12:33,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:33,645 INFO L225 Difference]: With dead ends: 1440 [2021-08-06 15:12:33,645 INFO L226 Difference]: Without dead ends: 1297 [2021-08-06 15:12:33,645 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 35.4ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-06 15:12:33,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1297 states. [2021-08-06 15:12:33,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1297 to 986. [2021-08-06 15:12:33,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 986 states, 985 states have (on average 3.296446700507614) internal successors, (3247), 985 states have internal predecessors, (3247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:33,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 3247 transitions. [2021-08-06 15:12:33,673 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 3247 transitions. Word has length 24 [2021-08-06 15:12:33,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:33,673 INFO L470 AbstractCegarLoop]: Abstraction has 986 states and 3247 transitions. [2021-08-06 15:12:33,674 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) [2021-08-06 15:12:33,674 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 3247 transitions. [2021-08-06 15:12:33,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:12:33,676 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:33,676 INFO L512 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] [2021-08-06 15:12:33,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-06 15:12:33,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:33,893 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:12:33,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:33,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1416074220, now seen corresponding path program 10 times [2021-08-06 15:12:33,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:33,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294361609] [2021-08-06 15:12:33,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:33,894 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:33,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:33,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:12:33,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:33,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294361609] [2021-08-06 15:12:33,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294361609] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:33,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052568021] [2021-08-06 15:12:33,934 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:12:33,934 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:33,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:33,935 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) [2021-08-06 15:12:33,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-06 15:12:34,256 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:12:34,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:12:34,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 15:12:34,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:34,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:12:34,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052568021] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:34,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:34,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-06 15:12:34,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021111262] [2021-08-06 15:12:34,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 15:12:34,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:34,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 15:12:34,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-06 15:12:34,373 INFO L87 Difference]: Start difference. First operand 986 states and 3247 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) [2021-08-06 15:12:34,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:34,444 INFO L93 Difference]: Finished difference Result 1349 states and 4231 transitions. [2021-08-06 15:12:34,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 15:12:34,444 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 24 [2021-08-06 15:12:34,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:34,450 INFO L225 Difference]: With dead ends: 1349 [2021-08-06 15:12:34,450 INFO L226 Difference]: Without dead ends: 1343 [2021-08-06 15:12:34,450 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 21.1ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-06 15:12:34,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1343 states. [2021-08-06 15:12:34,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1343 to 1016. [2021-08-06 15:12:34,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1016 states, 1015 states have (on average 3.2679802955665025) internal successors, (3317), 1015 states have internal predecessors, (3317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:34,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 3317 transitions. [2021-08-06 15:12:34,502 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 3317 transitions. Word has length 24 [2021-08-06 15:12:34,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:34,502 INFO L470 AbstractCegarLoop]: Abstraction has 1016 states and 3317 transitions. [2021-08-06 15:12:34,502 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) [2021-08-06 15:12:34,502 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 3317 transitions. [2021-08-06 15:12:34,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:12:34,506 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:34,506 INFO L512 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] [2021-08-06 15:12:34,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-06 15:12:34,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:34,729 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:12:34,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:34,729 INFO L82 PathProgramCache]: Analyzing trace with hash -243104664, now seen corresponding path program 11 times [2021-08-06 15:12:34,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:34,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243234335] [2021-08-06 15:12:34,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:34,730 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:34,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:34,784 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:34,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:34,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243234335] [2021-08-06 15:12:34,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243234335] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:34,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955890888] [2021-08-06 15:12:34,784 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:12:34,784 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:34,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:34,785 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) [2021-08-06 15:12:34,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-06 15:12:35,068 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:12:35,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:12:35,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 15:12:35,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:35,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:35,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955890888] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:35,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:35,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-06 15:12:35,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153132188] [2021-08-06 15:12:35,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 15:12:35,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:35,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 15:12:35,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-06 15:12:35,199 INFO L87 Difference]: Start difference. First operand 1016 states and 3317 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) [2021-08-06 15:12:35,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:35,292 INFO L93 Difference]: Finished difference Result 2033 states and 6560 transitions. [2021-08-06 15:12:35,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 15:12:35,292 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 24 [2021-08-06 15:12:35,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:35,302 INFO L225 Difference]: With dead ends: 2033 [2021-08-06 15:12:35,302 INFO L226 Difference]: Without dead ends: 2018 [2021-08-06 15:12:35,304 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 36.3ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-06 15:12:35,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2018 states. [2021-08-06 15:12:35,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2018 to 1477. [2021-08-06 15:12:35,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 1476 states have (on average 3.432249322493225) internal successors, (5066), 1476 states have internal predecessors, (5066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:35,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 5066 transitions. [2021-08-06 15:12:35,360 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 5066 transitions. Word has length 24 [2021-08-06 15:12:35,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:35,360 INFO L470 AbstractCegarLoop]: Abstraction has 1477 states and 5066 transitions. [2021-08-06 15:12:35,360 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) [2021-08-06 15:12:35,360 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 5066 transitions. [2021-08-06 15:12:35,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:12:35,365 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:35,365 INFO L512 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] [2021-08-06 15:12:35,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-08-06 15:12:35,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-08-06 15:12:35,591 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:12:35,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:35,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1639204200, now seen corresponding path program 12 times [2021-08-06 15:12:35,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:35,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379385684] [2021-08-06 15:12:35,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:35,592 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:35,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:35,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:35,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:35,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379385684] [2021-08-06 15:12:35,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379385684] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:35,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496695508] [2021-08-06 15:12:35,656 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:12:35,656 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:35,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:35,657 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) [2021-08-06 15:12:35,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-06 15:12:35,956 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:12:35,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:12:35,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 15:12:35,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:36,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:36,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496695508] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:36,087 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:36,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-06 15:12:36,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52776830] [2021-08-06 15:12:36,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 15:12:36,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:36,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 15:12:36,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-06 15:12:36,088 INFO L87 Difference]: Start difference. First operand 1477 states and 5066 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) [2021-08-06 15:12:36,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:36,175 INFO L93 Difference]: Finished difference Result 1938 states and 6279 transitions. [2021-08-06 15:12:36,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 15:12:36,177 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 24 [2021-08-06 15:12:36,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:36,186 INFO L225 Difference]: With dead ends: 1938 [2021-08-06 15:12:36,186 INFO L226 Difference]: Without dead ends: 1922 [2021-08-06 15:12:36,187 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 42.9ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-06 15:12:36,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1922 states. [2021-08-06 15:12:36,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1922 to 1400. [2021-08-06 15:12:36,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1400 states, 1399 states have (on average 3.3924231593995713) internal successors, (4746), 1399 states have internal predecessors, (4746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:36,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 4746 transitions. [2021-08-06 15:12:36,227 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 4746 transitions. Word has length 24 [2021-08-06 15:12:36,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:36,228 INFO L470 AbstractCegarLoop]: Abstraction has 1400 states and 4746 transitions. [2021-08-06 15:12:36,228 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) [2021-08-06 15:12:36,228 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 4746 transitions. [2021-08-06 15:12:36,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:12:36,232 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:36,232 INFO L512 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] [2021-08-06 15:12:36,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-06 15:12:36,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:36,453 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:12:36,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:36,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1856306738, now seen corresponding path program 13 times [2021-08-06 15:12:36,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:36,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57764303] [2021-08-06 15:12:36,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:36,454 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:36,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:36,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:36,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:36,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57764303] [2021-08-06 15:12:36,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57764303] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:36,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302653989] [2021-08-06 15:12:36,488 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:12:36,488 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:36,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:36,489 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) [2021-08-06 15:12:36,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-06 15:12:36,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:36,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 15:12:36,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:36,971 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:12:36,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302653989] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:36,971 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:36,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-06 15:12:36,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713754162] [2021-08-06 15:12:36,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 15:12:36,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:36,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 15:12:36,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-06 15:12:36,972 INFO L87 Difference]: Start difference. First operand 1400 states and 4746 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) [2021-08-06 15:12:37,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:37,059 INFO L93 Difference]: Finished difference Result 2961 states and 9894 transitions. [2021-08-06 15:12:37,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 15:12:37,060 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 24 [2021-08-06 15:12:37,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:37,089 INFO L225 Difference]: With dead ends: 2961 [2021-08-06 15:12:37,089 INFO L226 Difference]: Without dead ends: 2952 [2021-08-06 15:12:37,089 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 24.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-06 15:12:37,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2952 states. [2021-08-06 15:12:37,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2952 to 2033. [2021-08-06 15:12:37,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2033 states, 2032 states have (on average 3.534448818897638) internal successors, (7182), 2032 states have internal predecessors, (7182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:37,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2033 states to 2033 states and 7182 transitions. [2021-08-06 15:12:37,161 INFO L78 Accepts]: Start accepts. Automaton has 2033 states and 7182 transitions. Word has length 24 [2021-08-06 15:12:37,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:37,161 INFO L470 AbstractCegarLoop]: Abstraction has 2033 states and 7182 transitions. [2021-08-06 15:12:37,162 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) [2021-08-06 15:12:37,162 INFO L276 IsEmpty]: Start isEmpty. Operand 2033 states and 7182 transitions. [2021-08-06 15:12:37,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:12:37,167 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:37,167 INFO L512 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] [2021-08-06 15:12:37,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-06 15:12:37,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:37,380 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:12:37,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:37,381 INFO L82 PathProgramCache]: Analyzing trace with hash -266436362, now seen corresponding path program 14 times [2021-08-06 15:12:37,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:37,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368400451] [2021-08-06 15:12:37,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:37,381 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:37,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:37,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:37,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:37,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368400451] [2021-08-06 15:12:37,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368400451] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:37,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389900803] [2021-08-06 15:12:37,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:12:37,419 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:37,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:37,420 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) [2021-08-06 15:12:37,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-06 15:12:37,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:12:37,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:12:37,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 15:12:37,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:37,847 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:37,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389900803] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:37,848 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:37,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-06 15:12:37,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721791088] [2021-08-06 15:12:37,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 15:12:37,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:37,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 15:12:37,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-06 15:12:37,849 INFO L87 Difference]: Start difference. First operand 2033 states and 7182 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) [2021-08-06 15:12:37,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:37,918 INFO L93 Difference]: Finished difference Result 3041 states and 10107 transitions. [2021-08-06 15:12:37,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 15:12:37,919 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 24 [2021-08-06 15:12:37,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:37,928 INFO L225 Difference]: With dead ends: 3041 [2021-08-06 15:12:37,928 INFO L226 Difference]: Without dead ends: 3041 [2021-08-06 15:12:37,928 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 28.1ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-06 15:12:37,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3041 states. [2021-08-06 15:12:37,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3041 to 2012. [2021-08-06 15:12:37,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2012 states, 2011 states have (on average 3.52710094480358) internal successors, (7093), 2011 states have internal predecessors, (7093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:37,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2012 states to 2012 states and 7093 transitions. [2021-08-06 15:12:37,990 INFO L78 Accepts]: Start accepts. Automaton has 2012 states and 7093 transitions. Word has length 24 [2021-08-06 15:12:37,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:37,990 INFO L470 AbstractCegarLoop]: Abstraction has 2012 states and 7093 transitions. [2021-08-06 15:12:37,991 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) [2021-08-06 15:12:37,991 INFO L276 IsEmpty]: Start isEmpty. Operand 2012 states and 7093 transitions. [2021-08-06 15:12:37,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:12:37,996 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:37,997 INFO L512 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] [2021-08-06 15:12:38,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-06 15:12:38,209 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,SelfDestructingSolverStorable23 [2021-08-06 15:12:38,210 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:12:38,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:38,210 INFO L82 PathProgramCache]: Analyzing trace with hash -993594422, now seen corresponding path program 15 times [2021-08-06 15:12:38,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:38,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981859770] [2021-08-06 15:12:38,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:38,210 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:38,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:38,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:12:38,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:38,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981859770] [2021-08-06 15:12:38,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981859770] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:38,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254771314] [2021-08-06 15:12:38,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:12:38,255 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:38,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:38,256 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) [2021-08-06 15:12:38,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-06 15:12:38,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:12:38,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:12:38,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 15:12:38,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:38,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:38,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254771314] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:38,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:38,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-06 15:12:38,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370693541] [2021-08-06 15:12:38,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 15:12:38,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:38,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 15:12:38,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-08-06 15:12:38,768 INFO L87 Difference]: Start difference. First operand 2012 states and 7093 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) [2021-08-06 15:12:39,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:39,446 INFO L93 Difference]: Finished difference Result 9230 states and 29756 transitions. [2021-08-06 15:12:39,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-06 15:12:39,453 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 24 [2021-08-06 15:12:39,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:39,489 INFO L225 Difference]: With dead ends: 9230 [2021-08-06 15:12:39,489 INFO L226 Difference]: Without dead ends: 8962 [2021-08-06 15:12:39,490 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 390.4ms TimeCoverageRelationStatistics Valid=475, Invalid=1595, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 15:12:39,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8962 states. [2021-08-06 15:12:39,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8962 to 4517. [2021-08-06 15:12:39,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4517 states, 4516 states have (on average 3.649468556244464) internal successors, (16481), 4516 states have internal predecessors, (16481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:39,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4517 states to 4517 states and 16481 transitions. [2021-08-06 15:12:39,679 INFO L78 Accepts]: Start accepts. Automaton has 4517 states and 16481 transitions. Word has length 24 [2021-08-06 15:12:39,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:39,680 INFO L470 AbstractCegarLoop]: Abstraction has 4517 states and 16481 transitions. [2021-08-06 15:12:39,680 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) [2021-08-06 15:12:39,680 INFO L276 IsEmpty]: Start isEmpty. Operand 4517 states and 16481 transitions. [2021-08-06 15:12:39,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:12:39,693 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:39,693 INFO L512 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] [2021-08-06 15:12:39,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-06 15:12:39,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:39,909 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:12:39,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:39,909 INFO L82 PathProgramCache]: Analyzing trace with hash 2078630128, now seen corresponding path program 16 times [2021-08-06 15:12:39,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:39,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102456101] [2021-08-06 15:12:39,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:39,910 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:39,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:39,944 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:12:39,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:39,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102456101] [2021-08-06 15:12:39,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102456101] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:39,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471018009] [2021-08-06 15:12:39,945 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:12:39,945 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:39,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:39,946 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) [2021-08-06 15:12:39,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-06 15:12:40,271 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:12:40,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:12:40,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 15:12:40,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:40,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 15:12:40,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471018009] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:40,389 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:40,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-06 15:12:40,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540557247] [2021-08-06 15:12:40,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 15:12:40,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:40,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 15:12:40,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-06 15:12:40,390 INFO L87 Difference]: Start difference. First operand 4517 states and 16481 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) [2021-08-06 15:12:40,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:40,465 INFO L93 Difference]: Finished difference Result 5640 states and 19744 transitions. [2021-08-06 15:12:40,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 15:12:40,466 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 24 [2021-08-06 15:12:40,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:40,484 INFO L225 Difference]: With dead ends: 5640 [2021-08-06 15:12:40,484 INFO L226 Difference]: Without dead ends: 5614 [2021-08-06 15:12:40,484 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 21.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-06 15:12:40,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5614 states. [2021-08-06 15:12:40,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5614 to 4545. [2021-08-06 15:12:40,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4545 states, 4544 states have (on average 3.642825704225352) internal successors, (16553), 4544 states have internal predecessors, (16553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:40,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4545 states to 4545 states and 16553 transitions. [2021-08-06 15:12:40,635 INFO L78 Accepts]: Start accepts. Automaton has 4545 states and 16553 transitions. Word has length 24 [2021-08-06 15:12:40,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:40,635 INFO L470 AbstractCegarLoop]: Abstraction has 4545 states and 16553 transitions. [2021-08-06 15:12:40,635 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) [2021-08-06 15:12:40,635 INFO L276 IsEmpty]: Start isEmpty. Operand 4545 states and 16553 transitions. [2021-08-06 15:12:40,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:12:40,646 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:40,646 INFO L512 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] [2021-08-06 15:12:40,667 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-08-06 15:12:40,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:40,861 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:12:40,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:40,861 INFO L82 PathProgramCache]: Analyzing trace with hash 319339466, now seen corresponding path program 17 times [2021-08-06 15:12:40,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:40,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196290525] [2021-08-06 15:12:40,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:40,861 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:40,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:40,899 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:12:40,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:40,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196290525] [2021-08-06 15:12:40,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196290525] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:40,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237411678] [2021-08-06 15:12:40,900 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:12:40,900 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:40,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:40,900 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) [2021-08-06 15:12:40,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-06 15:12:41,217 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 15:12:41,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:12:41,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 15:12:41,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:41,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:12:41,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237411678] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:41,335 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:41,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-08-06 15:12:41,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070312860] [2021-08-06 15:12:41,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 15:12:41,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:41,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 15:12:41,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-06 15:12:41,336 INFO L87 Difference]: Start difference. First operand 4545 states and 16553 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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) [2021-08-06 15:12:41,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:41,570 INFO L93 Difference]: Finished difference Result 6419 states and 21871 transitions. [2021-08-06 15:12:41,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 15:12:41,570 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:12:41,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:41,593 INFO L225 Difference]: With dead ends: 6419 [2021-08-06 15:12:41,593 INFO L226 Difference]: Without dead ends: 6345 [2021-08-06 15:12:41,593 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 82.3ms TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:12:41,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6345 states. [2021-08-06 15:12:41,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6345 to 4523. [2021-08-06 15:12:41,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4523 states, 4522 states have (on average 3.645731977001327) internal successors, (16486), 4522 states have internal predecessors, (16486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:41,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4523 states to 4523 states and 16486 transitions. [2021-08-06 15:12:41,731 INFO L78 Accepts]: Start accepts. Automaton has 4523 states and 16486 transitions. Word has length 24 [2021-08-06 15:12:41,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:41,731 INFO L470 AbstractCegarLoop]: Abstraction has 4523 states and 16486 transitions. [2021-08-06 15:12:41,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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) [2021-08-06 15:12:41,731 INFO L276 IsEmpty]: Start isEmpty. Operand 4523 states and 16486 transitions. [2021-08-06 15:12:41,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:12:41,741 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:41,741 INFO L512 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] [2021-08-06 15:12:41,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-06 15:12:41,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:41,965 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:12:41,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:41,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1402063808, now seen corresponding path program 18 times [2021-08-06 15:12:41,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:41,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369292350] [2021-08-06 15:12:41,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:41,966 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:41,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:42,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:42,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:42,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369292350] [2021-08-06 15:12:42,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369292350] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:42,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553947347] [2021-08-06 15:12:42,007 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:12:42,007 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:42,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:42,008 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) [2021-08-06 15:12:42,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-06 15:12:42,355 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 15:12:42,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:12:42,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 15:12:42,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:42,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:12:42,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553947347] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:42,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:42,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-06 15:12:42,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278275919] [2021-08-06 15:12:42,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 15:12:42,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:42,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 15:12:42,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-06 15:12:42,461 INFO L87 Difference]: Start difference. First operand 4523 states and 16486 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) [2021-08-06 15:12:42,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:42,572 INFO L93 Difference]: Finished difference Result 5931 states and 21351 transitions. [2021-08-06 15:12:42,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 15:12:42,573 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 24 [2021-08-06 15:12:42,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:42,620 INFO L225 Difference]: With dead ends: 5931 [2021-08-06 15:12:42,620 INFO L226 Difference]: Without dead ends: 5906 [2021-08-06 15:12:42,620 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 23.3ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-06 15:12:42,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5906 states. [2021-08-06 15:12:42,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5906 to 5352. [2021-08-06 15:12:42,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5352 states, 5351 states have (on average 3.690712016445524) internal successors, (19749), 5351 states have internal predecessors, (19749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:42,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5352 states to 5352 states and 19749 transitions. [2021-08-06 15:12:42,733 INFO L78 Accepts]: Start accepts. Automaton has 5352 states and 19749 transitions. Word has length 24 [2021-08-06 15:12:42,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:42,733 INFO L470 AbstractCegarLoop]: Abstraction has 5352 states and 19749 transitions. [2021-08-06 15:12:42,733 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) [2021-08-06 15:12:42,733 INFO L276 IsEmpty]: Start isEmpty. Operand 5352 states and 19749 transitions. [2021-08-06 15:12:42,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:12:42,746 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:42,746 INFO L512 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] [2021-08-06 15:12:42,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-06 15:12:42,968 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,SelfDestructingSolverStorable27 [2021-08-06 15:12:42,969 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:12:42,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:42,969 INFO L82 PathProgramCache]: Analyzing trace with hash -199751440, now seen corresponding path program 19 times [2021-08-06 15:12:42,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:42,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023487670] [2021-08-06 15:12:42,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:42,970 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:42,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:43,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:43,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:43,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023487670] [2021-08-06 15:12:43,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023487670] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:43,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482005323] [2021-08-06 15:12:43,003 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:12:43,003 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:43,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:43,004 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) [2021-08-06 15:12:43,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-06 15:12:43,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:43,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 15:12:43,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:43,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:12:43,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482005323] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:43,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:43,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-06 15:12:43,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117190] [2021-08-06 15:12:43,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 15:12:43,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:43,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 15:12:43,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-06 15:12:43,457 INFO L87 Difference]: Start difference. First operand 5352 states and 19749 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) [2021-08-06 15:12:43,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:43,575 INFO L93 Difference]: Finished difference Result 6187 states and 22242 transitions. [2021-08-06 15:12:43,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 15:12:43,576 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 24 [2021-08-06 15:12:43,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:43,595 INFO L225 Difference]: With dead ends: 6187 [2021-08-06 15:12:43,596 INFO L226 Difference]: Without dead ends: 6177 [2021-08-06 15:12:43,597 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 34.3ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-06 15:12:43,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6177 states. [2021-08-06 15:12:43,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6177 to 5419. [2021-08-06 15:12:43,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5419 states, 5418 states have (on average 3.6864156515319304) internal successors, (19973), 5418 states have internal predecessors, (19973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:43,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5419 states to 5419 states and 19973 transitions. [2021-08-06 15:12:43,748 INFO L78 Accepts]: Start accepts. Automaton has 5419 states and 19973 transitions. Word has length 24 [2021-08-06 15:12:43,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:43,748 INFO L470 AbstractCegarLoop]: Abstraction has 5419 states and 19973 transitions. [2021-08-06 15:12:43,748 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) [2021-08-06 15:12:43,748 INFO L276 IsEmpty]: Start isEmpty. Operand 5419 states and 19973 transitions. [2021-08-06 15:12:43,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:12:43,759 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:43,760 INFO L512 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] [2021-08-06 15:12:43,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-06 15:12:43,972 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,SelfDestructingSolverStorable28 [2021-08-06 15:12:43,973 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:12:43,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:43,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1472685148, now seen corresponding path program 20 times [2021-08-06 15:12:43,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:43,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721807722] [2021-08-06 15:12:43,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:43,973 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:43,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:44,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:44,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:44,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721807722] [2021-08-06 15:12:44,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721807722] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:44,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607152718] [2021-08-06 15:12:44,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:12:44,007 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:44,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:44,008 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) [2021-08-06 15:12:44,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-06 15:12:44,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:12:44,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:12:44,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 15:12:44,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:44,484 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:44,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607152718] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:44,484 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:44,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-08-06 15:12:44,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439718133] [2021-08-06 15:12:44,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 15:12:44,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:44,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 15:12:44,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-06 15:12:44,485 INFO L87 Difference]: Start difference. First operand 5419 states and 19973 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 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) [2021-08-06 15:12:44,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:44,965 INFO L93 Difference]: Finished difference Result 7179 states and 25144 transitions. [2021-08-06 15:12:44,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 15:12:44,965 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:12:44,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:44,981 INFO L225 Difference]: With dead ends: 7179 [2021-08-06 15:12:44,981 INFO L226 Difference]: Without dead ends: 7111 [2021-08-06 15:12:44,982 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 282.2ms TimeCoverageRelationStatistics Valid=298, Invalid=1108, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 15:12:44,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7111 states. [2021-08-06 15:12:45,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7111 to 5518. [2021-08-06 15:12:45,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5518 states, 5517 states have (on average 3.6699293094072867) internal successors, (20247), 5517 states have internal predecessors, (20247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:45,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5518 states to 5518 states and 20247 transitions. [2021-08-06 15:12:45,112 INFO L78 Accepts]: Start accepts. Automaton has 5518 states and 20247 transitions. Word has length 24 [2021-08-06 15:12:45,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:45,112 INFO L470 AbstractCegarLoop]: Abstraction has 5518 states and 20247 transitions. [2021-08-06 15:12:45,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 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) [2021-08-06 15:12:45,112 INFO L276 IsEmpty]: Start isEmpty. Operand 5518 states and 20247 transitions. [2021-08-06 15:12:45,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:12:45,125 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:45,125 INFO L512 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] [2021-08-06 15:12:45,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-06 15:12:45,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:45,341 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:12:45,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:45,341 INFO L82 PathProgramCache]: Analyzing trace with hash 828713550, now seen corresponding path program 21 times [2021-08-06 15:12:45,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:45,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983493078] [2021-08-06 15:12:45,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:45,342 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:45,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:45,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:45,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:45,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983493078] [2021-08-06 15:12:45,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983493078] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:45,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430415688] [2021-08-06 15:12:45,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:12:45,412 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:45,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:45,413 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) [2021-08-06 15:12:45,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-06 15:12:45,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 15:12:45,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:12:45,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 15:12:45,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:45,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 15:12:45,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430415688] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:45,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:45,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-08-06 15:12:45,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957128302] [2021-08-06 15:12:45,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 15:12:45,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:45,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 15:12:45,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-06 15:12:45,943 INFO L87 Difference]: Start difference. First operand 5518 states and 20247 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 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) [2021-08-06 15:12:46,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:46,477 INFO L93 Difference]: Finished difference Result 11751 states and 40710 transitions. [2021-08-06 15:12:46,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-06 15:12:46,477 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:12:46,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:46,514 INFO L225 Difference]: With dead ends: 11751 [2021-08-06 15:12:46,514 INFO L226 Difference]: Without dead ends: 11587 [2021-08-06 15:12:46,515 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 289.3ms TimeCoverageRelationStatistics Valid=294, Invalid=1038, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 15:12:46,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11587 states. [2021-08-06 15:12:46,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11587 to 8418. [2021-08-06 15:12:46,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8418 states, 8417 states have (on average 3.7303077105857194) internal successors, (31398), 8417 states have internal predecessors, (31398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:46,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8418 states to 8418 states and 31398 transitions. [2021-08-06 15:12:46,756 INFO L78 Accepts]: Start accepts. Automaton has 8418 states and 31398 transitions. Word has length 24 [2021-08-06 15:12:46,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:46,756 INFO L470 AbstractCegarLoop]: Abstraction has 8418 states and 31398 transitions. [2021-08-06 15:12:46,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 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) [2021-08-06 15:12:46,757 INFO L276 IsEmpty]: Start isEmpty. Operand 8418 states and 31398 transitions. [2021-08-06 15:12:46,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:12:46,775 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:46,775 INFO L512 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] [2021-08-06 15:12:46,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-06 15:12:46,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:46,989 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:12:46,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:46,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1031366276, now seen corresponding path program 22 times [2021-08-06 15:12:46,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:46,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072567081] [2021-08-06 15:12:46,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:46,989 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:47,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:47,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:47,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:47,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072567081] [2021-08-06 15:12:47,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072567081] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:47,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149035416] [2021-08-06 15:12:47,072 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:12:47,072 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:47,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:47,072 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) [2021-08-06 15:12:47,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-06 15:12:47,433 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:12:47,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:12:47,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 15:12:47,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:47,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:47,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149035416] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:47,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:47,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-08-06 15:12:47,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595791929] [2021-08-06 15:12:47,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 15:12:47,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:47,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 15:12:47,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-06 15:12:47,575 INFO L87 Difference]: Start difference. First operand 8418 states and 31398 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:47,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:47,761 INFO L93 Difference]: Finished difference Result 9470 states and 34319 transitions. [2021-08-06 15:12:47,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 15:12:47,761 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:12:47,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:47,791 INFO L225 Difference]: With dead ends: 9470 [2021-08-06 15:12:47,791 INFO L226 Difference]: Without dead ends: 9392 [2021-08-06 15:12:47,792 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 58.7ms TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:12:47,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9392 states. [2021-08-06 15:12:47,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9392 to 8499. [2021-08-06 15:12:47,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8499 states, 8498 states have (on average 3.7232289950576605) internal successors, (31640), 8498 states have internal predecessors, (31640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:48,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8499 states to 8499 states and 31640 transitions. [2021-08-06 15:12:48,074 INFO L78 Accepts]: Start accepts. Automaton has 8499 states and 31640 transitions. Word has length 24 [2021-08-06 15:12:48,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:48,074 INFO L470 AbstractCegarLoop]: Abstraction has 8499 states and 31640 transitions. [2021-08-06 15:12:48,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:48,075 INFO L276 IsEmpty]: Start isEmpty. Operand 8499 states and 31640 transitions. [2021-08-06 15:12:48,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:12:48,096 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:48,096 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:48,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-06 15:12:48,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:48,320 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:12:48,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:48,320 INFO L82 PathProgramCache]: Analyzing trace with hash 213109642, now seen corresponding path program 23 times [2021-08-06 15:12:48,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:48,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759015991] [2021-08-06 15:12:48,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:48,320 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:48,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:48,681 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:48,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:48,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759015991] [2021-08-06 15:12:48,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759015991] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:48,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630076525] [2021-08-06 15:12:48,681 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:12:48,681 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:48,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:48,689 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) [2021-08-06 15:12:48,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-06 15:12:49,090 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:12:49,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:12:49,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 15:12:49,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:50,013 INFO L388 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 [2021-08-06 15:12:50,149 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 15:12:50,149 INFO L388 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 57 treesize of output 48 [2021-08-06 15:12:50,152 INFO L388 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 18 [2021-08-06 15:12:50,212 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:50,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630076525] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:50,212 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:50,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-08-06 15:12:50,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566120950] [2021-08-06 15:12:50,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 15:12:50,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:50,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 15:12:50,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-08-06 15:12:50,213 INFO L87 Difference]: Start difference. First operand 8499 states and 31640 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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) [2021-08-06 15:12:50,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:50,874 INFO L93 Difference]: Finished difference Result 11583 states and 42036 transitions. [2021-08-06 15:12:50,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 15:12:50,874 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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 28 [2021-08-06 15:12:50,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:50,906 INFO L225 Difference]: With dead ends: 11583 [2021-08-06 15:12:50,907 INFO L226 Difference]: Without dead ends: 11568 [2021-08-06 15:12:50,907 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 499.8ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:12:50,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11568 states. [2021-08-06 15:12:51,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11568 to 8601. [2021-08-06 15:12:51,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8601 states, 8600 states have (on average 3.716860465116279) internal successors, (31965), 8600 states have internal predecessors, (31965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:51,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8601 states to 8601 states and 31965 transitions. [2021-08-06 15:12:51,172 INFO L78 Accepts]: Start accepts. Automaton has 8601 states and 31965 transitions. Word has length 28 [2021-08-06 15:12:51,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:51,172 INFO L470 AbstractCegarLoop]: Abstraction has 8601 states and 31965 transitions. [2021-08-06 15:12:51,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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) [2021-08-06 15:12:51,172 INFO L276 IsEmpty]: Start isEmpty. Operand 8601 states and 31965 transitions. [2021-08-06 15:12:51,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:12:51,193 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:51,193 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:51,210 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-08-06 15:12:51,393 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,SelfDestructingSolverStorable32 [2021-08-06 15:12:51,394 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:12:51,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:51,394 INFO L82 PathProgramCache]: Analyzing trace with hash 837768650, now seen corresponding path program 24 times [2021-08-06 15:12:51,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:51,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208711398] [2021-08-06 15:12:51,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:51,395 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:51,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:51,733 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:51,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:51,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208711398] [2021-08-06 15:12:51,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208711398] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:51,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216625418] [2021-08-06 15:12:51,733 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:12:51,733 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:51,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:51,761 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) [2021-08-06 15:12:51,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-06 15:12:52,211 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:12:52,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:12:52,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 15:12:52,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:52,838 INFO L388 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 [2021-08-06 15:12:53,138 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 15:12:53,138 INFO L388 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 57 treesize of output 48 [2021-08-06 15:12:53,141 INFO L388 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 18 [2021-08-06 15:12:53,202 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:53,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216625418] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:53,203 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:53,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-08-06 15:12:53,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201217546] [2021-08-06 15:12:53,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 15:12:53,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:53,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 15:12:53,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-08-06 15:12:53,204 INFO L87 Difference]: Start difference. First operand 8601 states and 31965 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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) [2021-08-06 15:12:53,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:53,865 INFO L93 Difference]: Finished difference Result 11653 states and 42250 transitions. [2021-08-06 15:12:53,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 15:12:53,865 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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 28 [2021-08-06 15:12:53,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:53,895 INFO L225 Difference]: With dead ends: 11653 [2021-08-06 15:12:53,895 INFO L226 Difference]: Without dead ends: 11611 [2021-08-06 15:12:53,895 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 439.9ms TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:12:53,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11611 states. [2021-08-06 15:12:54,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11611 to 8620. [2021-08-06 15:12:54,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8620 states, 8619 states have (on average 3.716092354101404) internal successors, (32029), 8619 states have internal predecessors, (32029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:54,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8620 states to 8620 states and 32029 transitions. [2021-08-06 15:12:54,164 INFO L78 Accepts]: Start accepts. Automaton has 8620 states and 32029 transitions. Word has length 28 [2021-08-06 15:12:54,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:54,165 INFO L470 AbstractCegarLoop]: Abstraction has 8620 states and 32029 transitions. [2021-08-06 15:12:54,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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) [2021-08-06 15:12:54,165 INFO L276 IsEmpty]: Start isEmpty. Operand 8620 states and 32029 transitions. [2021-08-06 15:12:54,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:12:54,181 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:54,181 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:54,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-06 15:12:54,384 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,SelfDestructingSolverStorable33 [2021-08-06 15:12:54,385 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:12:54,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:54,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1190629366, now seen corresponding path program 25 times [2021-08-06 15:12:54,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:54,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864769273] [2021-08-06 15:12:54,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:54,386 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:54,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:54,667 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:54,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:54,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864769273] [2021-08-06 15:12:54,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864769273] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:54,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765545994] [2021-08-06 15:12:54,667 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:12:54,667 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:54,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:54,668 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) [2021-08-06 15:12:54,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-06 15:12:55,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:55,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 15:12:55,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:55,759 INFO L388 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 [2021-08-06 15:12:55,927 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 15:12:55,928 INFO L388 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 48 treesize of output 39 [2021-08-06 15:12:55,972 INFO L388 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 18 [2021-08-06 15:12:56,053 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:56,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765545994] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:56,054 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:56,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-08-06 15:12:56,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774249821] [2021-08-06 15:12:56,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 15:12:56,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:56,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 15:12:56,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-08-06 15:12:56,056 INFO L87 Difference]: Start difference. First operand 8620 states and 32029 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-08-06 15:12:56,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:56,582 INFO L93 Difference]: Finished difference Result 11729 states and 42507 transitions. [2021-08-06 15:12:56,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 15:12:56,583 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 [2021-08-06 15:12:56,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:56,609 INFO L225 Difference]: With dead ends: 11729 [2021-08-06 15:12:56,609 INFO L226 Difference]: Without dead ends: 11714 [2021-08-06 15:12:56,610 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 391.5ms TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:12:56,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11714 states. [2021-08-06 15:12:56,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11714 to 8638. [2021-08-06 15:12:56,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8638 states, 8637 states have (on average 3.717031376635406) internal successors, (32104), 8637 states have internal predecessors, (32104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:56,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8638 states to 8638 states and 32104 transitions. [2021-08-06 15:12:56,807 INFO L78 Accepts]: Start accepts. Automaton has 8638 states and 32104 transitions. Word has length 28 [2021-08-06 15:12:56,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:56,807 INFO L470 AbstractCegarLoop]: Abstraction has 8638 states and 32104 transitions. [2021-08-06 15:12:56,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-08-06 15:12:56,807 INFO L276 IsEmpty]: Start isEmpty. Operand 8638 states and 32104 transitions. [2021-08-06 15:12:56,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:12:56,821 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:56,822 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:56,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-06 15:12:57,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-08-06 15:12:57,022 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:12:57,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:57,023 INFO L82 PathProgramCache]: Analyzing trace with hash 631830218, now seen corresponding path program 26 times [2021-08-06 15:12:57,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:57,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378658570] [2021-08-06 15:12:57,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:57,023 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:57,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:57,303 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:57,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:57,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378658570] [2021-08-06 15:12:57,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378658570] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:57,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447440196] [2021-08-06 15:12:57,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:12:57,303 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:57,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:57,305 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) [2021-08-06 15:12:57,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-06 15:12:57,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:12:57,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:12:57,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 15:12:57,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:58,522 INFO L388 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 [2021-08-06 15:12:58,983 INFO L388 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 57 treesize of output 53 [2021-08-06 15:12:58,993 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 15:12:58,994 INFO L388 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 49 treesize of output 40 [2021-08-06 15:12:58,997 INFO L388 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 18 [2021-08-06 15:12:59,054 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:59,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447440196] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:59,054 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:59,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-08-06 15:12:59,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590112519] [2021-08-06 15:12:59,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 15:12:59,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:59,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 15:12:59,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-08-06 15:12:59,057 INFO L87 Difference]: Start difference. First operand 8638 states and 32104 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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) [2021-08-06 15:12:59,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:59,679 INFO L93 Difference]: Finished difference Result 11712 states and 42480 transitions. [2021-08-06 15:12:59,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 15:12:59,679 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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 28 [2021-08-06 15:12:59,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:59,713 INFO L225 Difference]: With dead ends: 11712 [2021-08-06 15:12:59,713 INFO L226 Difference]: Without dead ends: 11697 [2021-08-06 15:12:59,713 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 396.0ms TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:12:59,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11697 states. [2021-08-06 15:12:59,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11697 to 8684. [2021-08-06 15:12:59,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8684 states, 8683 states have (on average 3.71542093746401) internal successors, (32261), 8683 states have internal predecessors, (32261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:59,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8684 states to 8684 states and 32261 transitions. [2021-08-06 15:12:59,930 INFO L78 Accepts]: Start accepts. Automaton has 8684 states and 32261 transitions. Word has length 28 [2021-08-06 15:12:59,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:59,930 INFO L470 AbstractCegarLoop]: Abstraction has 8684 states and 32261 transitions. [2021-08-06 15:12:59,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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) [2021-08-06 15:12:59,930 INFO L276 IsEmpty]: Start isEmpty. Operand 8684 states and 32261 transitions. [2021-08-06 15:12:59,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:12:59,946 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:59,946 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:59,964 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-08-06 15:13:00,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:13:00,147 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:13:00,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:13:00,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1396567798, now seen corresponding path program 27 times [2021-08-06 15:13:00,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:13:00,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98287323] [2021-08-06 15:13:00,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:13:00,148 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:13:00,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:13:00,538 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:13:00,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:13:00,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98287323] [2021-08-06 15:13:00,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98287323] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:13:00,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694517388] [2021-08-06 15:13:00,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:13:00,538 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:13:00,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:13:00,539 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) [2021-08-06 15:13:00,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-06 15:13:01,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:13:01,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:13:01,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-06 15:13:01,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:13:01,755 INFO L388 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 [2021-08-06 15:13:02,151 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 15:13:02,151 INFO L388 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 66 treesize of output 70 [2021-08-06 15:13:02,156 INFO L388 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 93 treesize of output 83 [2021-08-06 15:13:02,491 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2021-08-06 15:13:02,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-06 15:13:02,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-06 15:13:02,705 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Alternating quantifiers not yet supported at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:313) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:95) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:80) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:75) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:918) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:880) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:798) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:425) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:162) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:251) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:235) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminateCompat(PartialQuantifierElimination.java:128) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminateCompat(PartialQuantifierElimination.java:151) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:245) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:438) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:200) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:385) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-08-06 15:13:02,707 INFO L168 Benchmark]: Toolchain (without parser) took 41299.64 ms. Allocated memory was 184.5 MB in the beginning and 1.1 GB in the end (delta: 936.4 MB). Free memory was 165.0 MB in the beginning and 800.6 MB in the end (delta: -635.6 MB). Peak memory consumption was 302.1 MB. Max. memory is 8.0 GB. [2021-08-06 15:13:02,708 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 184.5 MB. Free memory is still 166.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 15:13:02,708 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.43 ms. Allocated memory is still 184.5 MB. Free memory was 164.9 MB in the beginning and 163.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 15:13:02,708 INFO L168 Benchmark]: Boogie Preprocessor took 24.47 ms. Allocated memory is still 184.5 MB. Free memory was 163.4 MB in the beginning and 162.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 15:13:02,708 INFO L168 Benchmark]: RCFGBuilder took 306.48 ms. Allocated memory is still 184.5 MB. Free memory was 162.3 MB in the beginning and 148.8 MB in the end (delta: 13.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-08-06 15:13:02,708 INFO L168 Benchmark]: TraceAbstraction took 40935.14 ms. Allocated memory was 184.5 MB in the beginning and 1.1 GB in the end (delta: 936.4 MB). Free memory was 148.3 MB in the beginning and 800.6 MB in the end (delta: -652.4 MB). Peak memory consumption was 285.3 MB. Max. memory is 8.0 GB. [2021-08-06 15:13:02,709 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 184.5 MB. Free memory is still 166.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 28.43 ms. Allocated memory is still 184.5 MB. Free memory was 164.9 MB in the beginning and 163.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 24.47 ms. Allocated memory is still 184.5 MB. Free memory was 163.4 MB in the beginning and 162.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 306.48 ms. Allocated memory is still 184.5 MB. Free memory was 162.3 MB in the beginning and 148.8 MB in the end (delta: 13.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 40935.14 ms. Allocated memory was 184.5 MB in the beginning and 1.1 GB in the end (delta: 936.4 MB). Free memory was 148.3 MB in the beginning and 800.6 MB in the end (delta: -652.4 MB). Peak memory consumption was 285.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Alternating quantifiers not yet supported de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Alternating quantifiers not yet supported: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-08-06 15:13:02,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...