/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-Delay.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/queue-add-2-nl.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 18:44:30,900 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 18:44:30,902 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 18:44:30,941 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-21 18:44:31,004 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-Delay.epf [2021-08-21 18:44:31,041 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 18:44:31,041 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 18:44:31,045 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 18:44:31,045 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 18:44:31,045 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 18:44:31,045 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 18:44:31,045 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 18:44:31,045 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 18:44:31,045 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 18:44:31,046 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 18:44:31,046 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 18:44:31,047 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 18:44:31,047 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 18:44:31,047 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 18:44:31,047 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 18:44:31,047 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 18:44:31,047 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 18:44:31,047 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 18:44:31,048 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 18:44:31,048 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 18:44:31,048 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 18:44:31,048 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 18:44:31,048 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 18:44:31,048 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 18:44:31,049 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 18:44:31,049 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 18:44:31,049 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 18:44:31,049 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 18:44:31,049 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 18:44:31,049 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-21 18:44:31,049 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 18:44:31,383 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 18:44:31,407 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 18:44:31,409 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 18:44:31,410 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 18:44:31,411 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 18:44:31,412 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/queue-add-2-nl.wvr.bpl [2021-08-21 18:44:31,412 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/queue-add-2-nl.wvr.bpl' [2021-08-21 18:44:31,441 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 18:44:31,442 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 18:44:31,444 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 18:44:31,444 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 18:44:31,444 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 18:44:31,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:44:31" (1/1) ... [2021-08-21 18:44:31,464 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:44:31" (1/1) ... [2021-08-21 18:44:31,471 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 18:44:31,472 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 18:44:31,473 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 18:44:31,473 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 18:44:31,479 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:44:31" (1/1) ... [2021-08-21 18:44:31,480 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:44:31" (1/1) ... [2021-08-21 18:44:31,481 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:44:31" (1/1) ... [2021-08-21 18:44:31,482 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:44:31" (1/1) ... [2021-08-21 18:44:31,487 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:44:31" (1/1) ... [2021-08-21 18:44:31,491 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:44:31" (1/1) ... [2021-08-21 18:44:31,492 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:44:31" (1/1) ... [2021-08-21 18:44:31,494 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 18:44:31,495 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 18:44:31,495 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 18:44:31,495 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 18:44:31,496 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:44:31" (1/1) ... [2021-08-21 18:44:31,502 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 18:44:31,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:44:31,528 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) [2021-08-21 18:44:31,530 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 [2021-08-21 18:44:31,559 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 18:44:31,559 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 18:44:31,559 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 18:44:31,559 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 18:44:31,560 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 18:44:31,560 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 18:44:31,560 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 18:44:31,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 18:44:31,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 18:44:31,561 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-21 18:44:31,786 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 18:44:31,786 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-21 18:44:31,788 INFO L202 PluginConnector]: Adding new model queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:44:31 BoogieIcfgContainer [2021-08-21 18:44:31,788 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 18:44:31,790 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 18:44:31,790 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 18:44:31,792 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 18:44:31,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:44:31" (1/2) ... [2021-08-21 18:44:31,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ca4622f and model type queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:44:31, skipping insertion in model container [2021-08-21 18:44:31,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:44:31" (2/2) ... [2021-08-21 18:44:31,794 INFO L111 eAbstractionObserver]: Analyzing ICFG queue-add-2-nl.wvr.bpl [2021-08-21 18:44:31,807 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 18:44:31,807 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 18:44:31,807 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 18:44:31,807 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 18:44:31,869 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-21 18:44:31,920 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 18:44:31,928 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 [2021-08-21 18:44:31,928 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-21 18:44:32,053 INFO L276 IsEmpty]: Start isEmpty. Operand has 104 states, 86 states have (on average 1.3255813953488371) internal successors, (114), 103 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:44:32,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 18:44:32,069 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:44:32,069 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:44:32,070 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:44:32,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:44:32,077 INFO L82 PathProgramCache]: Analyzing trace with hash -341260671, now seen corresponding path program 1 times [2021-08-21 18:44:32,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:44:32,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074541301] [2021-08-21 18:44:32,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:44:32,087 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:44:32,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:44:32,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:44:32,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:44:32,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074541301] [2021-08-21 18:44:32,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074541301] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:44:32,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:44:32,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:44:32,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642645560] [2021-08-21 18:44:32,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 18:44:32,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:44:32,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 18:44:32,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:44:32,273 INFO L87 Difference]: Start difference. First operand has 104 states, 86 states have (on average 1.3255813953488371) internal successors, (114), 103 states have internal predecessors, (114), 0 states have call successors, (0), 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), 3 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) [2021-08-21 18:44:32,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:44:32,298 INFO L93 Difference]: Finished difference Result 114 states and 124 transitions. [2021-08-21 18:44:32,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 18:44:32,301 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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 [2021-08-21 18:44:32,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:44:32,313 INFO L225 Difference]: With dead ends: 114 [2021-08-21 18:44:32,313 INFO L226 Difference]: Without dead ends: 25 [2021-08-21 18:44:32,316 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:44:32,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-08-21 18:44:32,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-08-21 18:44:32,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:44:32,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2021-08-21 18:44:32,343 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 16 [2021-08-21 18:44:32,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:44:32,343 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-08-21 18:44:32,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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) [2021-08-21 18:44:32,343 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2021-08-21 18:44:32,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 18:44:32,345 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:44:32,345 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] [2021-08-21 18:44:32,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 18:44:32,346 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:44:32,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:44:32,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1897997073, now seen corresponding path program 1 times [2021-08-21 18:44:32,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:44:32,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744499392] [2021-08-21 18:44:32,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:44:32,350 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:44:32,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:44:32,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:44:32,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:44:32,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744499392] [2021-08-21 18:44:32,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744499392] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:44:32,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64755298] [2021-08-21 18:44:32,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:44:32,850 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:44:32,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:44:32,851 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) [2021-08-21 18:44:32,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-21 18:44:32,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:44:32,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 18:44:32,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:44:33,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:44:33,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64755298] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:44:33,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:44:33,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-08-21 18:44:33,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687786892] [2021-08-21 18:44:33,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 18:44:33,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:44:33,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 18:44:33,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:44:33,519 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:44:33,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:44:33,870 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2021-08-21 18:44:33,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 18:44:33,871 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 18:44:33,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:44:33,872 INFO L225 Difference]: With dead ends: 46 [2021-08-21 18:44:33,872 INFO L226 Difference]: Without dead ends: 42 [2021-08-21 18:44:33,874 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 534.4ms TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:44:33,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-08-21 18:44:33,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2021-08-21 18:44:33,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 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) [2021-08-21 18:44:33,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-08-21 18:44:33,887 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 21 [2021-08-21 18:44:33,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:44:33,888 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-08-21 18:44:33,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:44:33,889 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-08-21 18:44:33,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 18:44:33,890 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:44:33,891 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, 1, 1, 1] [2021-08-21 18:44:33,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-21 18:44:34,117 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 [2021-08-21 18:44:34,118 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:44:34,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:44:34,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1912680525, now seen corresponding path program 1 times [2021-08-21 18:44:34,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:44:34,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771682916] [2021-08-21 18:44:34,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:44:34,119 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:44:34,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:44:34,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:44:34,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:44:34,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771682916] [2021-08-21 18:44:34,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771682916] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:44:34,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750964177] [2021-08-21 18:44:34,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:44:34,182 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:44:34,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:44:34,186 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) [2021-08-21 18:44:34,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-21 18:44:34,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:44:34,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:44:34,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:44:34,358 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 11 treesize of output 7 [2021-08-21 18:44:34,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:44:34,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750964177] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:44:34,394 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:44:34,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:44:34,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650775777] [2021-08-21 18:44:34,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:44:34,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:44:34,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:44:34,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:44:34,395 INFO L87 Difference]: Start difference. First operand 36 states and 38 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) [2021-08-21 18:44:34,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:44:34,449 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2021-08-21 18:44:34,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:44:34,450 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 25 [2021-08-21 18:44:34,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:44:34,451 INFO L225 Difference]: With dead ends: 44 [2021-08-21 18:44:34,451 INFO L226 Difference]: Without dead ends: 44 [2021-08-21 18:44:34,451 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 29.7ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:44:34,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-08-21 18:44:34,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2021-08-21 18:44:34,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 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) [2021-08-21 18:44:34,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-08-21 18:44:34,454 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 25 [2021-08-21 18:44:34,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:44:34,454 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-08-21 18:44:34,455 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) [2021-08-21 18:44:34,455 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-08-21 18:44:34,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:44:34,455 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:44:34,455 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:44:34,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-21 18:44:34,668 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,SelfDestructingSolverStorable2 [2021-08-21 18:44:34,669 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:44:34,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:44:34,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1975771007, now seen corresponding path program 2 times [2021-08-21 18:44:34,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:44:34,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753376431] [2021-08-21 18:44:34,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:44:34,670 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:44:34,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:44:34,727 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:44:34,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:44:34,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753376431] [2021-08-21 18:44:34,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753376431] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:44:34,728 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:44:34,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:44:34,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355068150] [2021-08-21 18:44:34,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:44:34,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:44:34,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:44:34,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:44:34,729 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:44:34,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:44:34,747 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2021-08-21 18:44:34,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 18:44:34,748 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:44:34,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:44:34,750 INFO L225 Difference]: With dead ends: 49 [2021-08-21 18:44:34,750 INFO L226 Difference]: Without dead ends: 37 [2021-08-21 18:44:34,750 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.1ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:44:34,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-08-21 18:44:34,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2021-08-21 18:44:34,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 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) [2021-08-21 18:44:34,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2021-08-21 18:44:34,753 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 26 [2021-08-21 18:44:34,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:44:34,753 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2021-08-21 18:44:34,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:44:34,753 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2021-08-21 18:44:34,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:44:34,754 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:44:34,754 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:44:34,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-21 18:44:34,754 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:44:34,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:44:34,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1430325051, now seen corresponding path program 2 times [2021-08-21 18:44:34,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:44:34,755 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933450867] [2021-08-21 18:44:34,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:44:34,755 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:44:34,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:44:35,339 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:44:35,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:44:35,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933450867] [2021-08-21 18:44:35,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933450867] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:44:35,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684968286] [2021-08-21 18:44:35,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:44:35,344 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:44:35,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:44:35,349 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) [2021-08-21 18:44:35,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-21 18:44:35,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:44:35,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:44:35,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 18:44:35,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:44:35,896 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 15 treesize of output 7 [2021-08-21 18:44:36,453 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:44:36,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684968286] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:44:36,454 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:44:36,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 31 [2021-08-21 18:44:36,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753730240] [2021-08-21 18:44:36,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 18:44:36,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:44:36,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 18:44:36,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=899, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:44:36,457 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:44:37,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:44:37,118 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2021-08-21 18:44:37,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 18:44:37,119 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 18:44:37,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:44:37,120 INFO L225 Difference]: With dead ends: 59 [2021-08-21 18:44:37,120 INFO L226 Difference]: Without dead ends: 55 [2021-08-21 18:44:37,121 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 1025.4ms TimeCoverageRelationStatistics Valid=142, Invalid=1418, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:44:37,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-08-21 18:44:37,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 45. [2021-08-21 18:44:37,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 44 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:44:37,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-08-21 18:44:37,133 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 30 [2021-08-21 18:44:37,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:44:37,133 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-08-21 18:44:37,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:44:37,134 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-08-21 18:44:37,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 18:44:37,140 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:44:37,140 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:44:37,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-21 18:44:37,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:44:37,365 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:44:37,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:44:37,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1579938039, now seen corresponding path program 3 times [2021-08-21 18:44:37,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:44:37,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796490841] [2021-08-21 18:44:37,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:44:37,365 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:44:37,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:44:37,495 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:44:37,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:44:37,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796490841] [2021-08-21 18:44:37,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796490841] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:44:37,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812022865] [2021-08-21 18:44:37,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:44:37,495 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:44:37,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:44:37,496 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) [2021-08-21 18:44:37,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-21 18:44:37,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:44:37,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:44:37,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 18:44:37,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:44:37,788 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 11 treesize of output 7 [2021-08-21 18:44:37,824 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:44:37,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812022865] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:44:37,824 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:44:37,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-21 18:44:37,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341158740] [2021-08-21 18:44:37,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:44:37,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:44:37,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:44:37,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:44:37,826 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 14 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:44:37,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:44:37,987 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2021-08-21 18:44:37,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 18:44:37,987 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 14 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-21 18:44:37,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:44:37,988 INFO L225 Difference]: With dead ends: 63 [2021-08-21 18:44:37,988 INFO L226 Difference]: Without dead ends: 63 [2021-08-21 18:44:37,988 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 192.4ms TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:44:37,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-08-21 18:44:37,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 36. [2021-08-21 18:44:37,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:44:37,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-08-21 18:44:37,991 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 34 [2021-08-21 18:44:37,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:44:37,992 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-08-21 18:44:37,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 14 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:44:37,992 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-08-21 18:44:37,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 18:44:37,992 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:44:37,993 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:44:38,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-21 18:44:38,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:44:38,216 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:44:38,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:44:38,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1982053197, now seen corresponding path program 4 times [2021-08-21 18:44:38,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:44:38,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222125220] [2021-08-21 18:44:38,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:44:38,217 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:44:38,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:44:38,271 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:44:38,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:44:38,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222125220] [2021-08-21 18:44:38,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222125220] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:44:38,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244958446] [2021-08-21 18:44:38,272 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:44:38,272 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:44:38,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:44:38,273 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) [2021-08-21 18:44:38,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-21 18:44:38,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:44:38,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:44:38,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 18:44:38,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:44:38,527 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:44:38,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244958446] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:44:38,527 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:44:38,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-21 18:44:38,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033576946] [2021-08-21 18:44:38,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:44:38,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:44:38,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:44:38,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:44:38,529 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:44:38,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:44:38,552 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2021-08-21 18:44:38,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:44:38,553 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 18:44:38,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:44:38,553 INFO L225 Difference]: With dead ends: 63 [2021-08-21 18:44:38,553 INFO L226 Difference]: Without dead ends: 46 [2021-08-21 18:44:38,553 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 12.3ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:44:38,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-08-21 18:44:38,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2021-08-21 18:44:38,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:44:38,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-08-21 18:44:38,556 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 35 [2021-08-21 18:44:38,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:44:38,556 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-08-21 18:44:38,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:44:38,556 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-08-21 18:44:38,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:44:38,557 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:44:38,557 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:44:38,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-21 18:44:38,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:44:38,765 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:44:38,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:44:38,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1563037815, now seen corresponding path program 5 times [2021-08-21 18:44:38,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:44:38,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583022533] [2021-08-21 18:44:38,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:44:38,766 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:44:38,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:44:39,866 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:44:39,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:44:39,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583022533] [2021-08-21 18:44:39,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583022533] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:44:39,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815154888] [2021-08-21 18:44:39,867 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:44:39,867 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:44:39,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:44:39,868 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) [2021-08-21 18:44:39,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-21 18:44:40,030 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:44:40,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:44:40,031 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-21 18:44:40,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:44:41,185 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:44:41,185 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-21 18:44:41,693 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:44:41,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815154888] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:44:41,694 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:44:41,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 47 [2021-08-21 18:44:41,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374996109] [2021-08-21 18:44:41,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-08-21 18:44:41,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:44:41,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-08-21 18:44:41,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=2130, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 18:44:41,697 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 48 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 47 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:44:43,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:44:43,038 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2021-08-21 18:44:43,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 18:44:43,038 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 47 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 18:44:43,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:44:43,039 INFO L225 Difference]: With dead ends: 73 [2021-08-21 18:44:43,039 INFO L226 Difference]: Without dead ends: 69 [2021-08-21 18:44:43,040 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 2226.9ms TimeCoverageRelationStatistics Valid=220, Invalid=3686, Unknown=0, NotChecked=0, Total=3906 [2021-08-21 18:44:43,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-08-21 18:44:43,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 54. [2021-08-21 18:44:43,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 53 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:44:43,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2021-08-21 18:44:43,044 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 39 [2021-08-21 18:44:43,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:44:43,044 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2021-08-21 18:44:43,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 47 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:44:43,044 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2021-08-21 18:44:43,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:44:43,045 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:44:43,045 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:44:43,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-21 18:44:43,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:44:43,261 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:44:43,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:44:43,261 INFO L82 PathProgramCache]: Analyzing trace with hash 110863813, now seen corresponding path program 6 times [2021-08-21 18:44:43,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:44:43,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822879613] [2021-08-21 18:44:43,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:44:43,262 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:44:43,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:44:43,414 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:44:43,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:44:43,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822879613] [2021-08-21 18:44:43,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822879613] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:44:43,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664325280] [2021-08-21 18:44:43,416 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:44:43,416 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:44:43,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:44:43,421 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) [2021-08-21 18:44:43,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-21 18:44:43,676 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 18:44:43,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:44:43,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 18:44:43,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:44:43,881 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 11 treesize of output 7 [2021-08-21 18:44:43,916 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:44:43,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664325280] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:44:43,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:44:43,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-21 18:44:43,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024881034] [2021-08-21 18:44:43,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 18:44:43,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:44:43,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 18:44:43,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:44:43,918 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 19 states, 19 states have (on average 4.2105263157894735) internal successors, (80), 18 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:44:44,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:44:44,254 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2021-08-21 18:44:44,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 18:44:44,255 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.2105263157894735) internal successors, (80), 18 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 18:44:44,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:44:44,256 INFO L225 Difference]: With dead ends: 77 [2021-08-21 18:44:44,256 INFO L226 Difference]: Without dead ends: 77 [2021-08-21 18:44:44,256 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 337.6ms TimeCoverageRelationStatistics Valid=149, Invalid=721, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:44:44,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-08-21 18:44:44,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 45. [2021-08-21 18:44:44,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:44:44,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-08-21 18:44:44,262 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 43 [2021-08-21 18:44:44,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:44:44,262 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-08-21 18:44:44,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.2105263157894735) internal successors, (80), 18 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:44:44,263 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-08-21 18:44:44,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-21 18:44:44,263 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:44:44,263 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:44:44,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-21 18:44:44,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:44:44,485 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:44:44,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:44:44,485 INFO L82 PathProgramCache]: Analyzing trace with hash 845963017, now seen corresponding path program 7 times [2021-08-21 18:44:44,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:44:44,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289404996] [2021-08-21 18:44:44,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:44:44,486 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:44:44,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:44:44,556 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 34 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:44:44,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:44:44,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289404996] [2021-08-21 18:44:44,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289404996] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:44:44,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495519320] [2021-08-21 18:44:44,557 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:44:44,557 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:44:44,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:44:44,558 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) [2021-08-21 18:44:44,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-21 18:44:44,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:44:44,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:44:44,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:44:44,946 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 34 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:44:44,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495519320] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:44:44,947 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:44:44,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-21 18:44:44,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697470219] [2021-08-21 18:44:44,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:44:44,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:44:44,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:44:44,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:44:44,948 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:44:44,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:44:44,978 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2021-08-21 18:44:44,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:44:44,979 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-21 18:44:44,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:44:44,980 INFO L225 Difference]: With dead ends: 77 [2021-08-21 18:44:44,980 INFO L226 Difference]: Without dead ends: 55 [2021-08-21 18:44:44,981 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 17.6ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:44:44,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-08-21 18:44:44,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2021-08-21 18:44:44,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:44:44,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2021-08-21 18:44:44,987 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 44 [2021-08-21 18:44:44,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:44:44,987 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2021-08-21 18:44:44,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:44:44,987 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2021-08-21 18:44:44,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-21 18:44:44,988 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:44:44,988 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:44:45,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-21 18:44:45,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-21 18:44:45,207 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:44:45,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:44:45,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1512779341, now seen corresponding path program 8 times [2021-08-21 18:44:45,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:44:45,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803675404] [2021-08-21 18:44:45,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:44:45,208 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:44:45,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:44:46,671 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:44:46,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:44:46,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803675404] [2021-08-21 18:44:46,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803675404] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:44:46,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904967948] [2021-08-21 18:44:46,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:44:46,672 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:44:46,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:44:46,673 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) [2021-08-21 18:44:46,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-21 18:44:46,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:44:46,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:44:46,969 WARN L261 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 66 conjunts are in the unsatisfiable core [2021-08-21 18:44:46,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:44:48,707 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-08-21 18:44:48,707 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 42 treesize of output 18 [2021-08-21 18:44:49,280 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:44:49,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904967948] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:44:49,281 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:44:49,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 29] total 60 [2021-08-21 18:44:49,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120784998] [2021-08-21 18:44:49,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-08-21 18:44:49,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:44:49,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-08-21 18:44:49,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=3501, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 18:44:49,283 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 61 states, 61 states have (on average 1.5573770491803278) internal successors, (95), 60 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:44:51,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:44:51,060 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2021-08-21 18:44:51,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 18:44:51,061 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.5573770491803278) internal successors, (95), 60 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-21 18:44:51,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:44:51,061 INFO L225 Difference]: With dead ends: 87 [2021-08-21 18:44:51,061 INFO L226 Difference]: Without dead ends: 83 [2021-08-21 18:44:51,062 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 3135.3ms TimeCoverageRelationStatistics Valid=237, Invalid=5313, Unknown=0, NotChecked=0, Total=5550 [2021-08-21 18:44:51,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-08-21 18:44:51,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 63. [2021-08-21 18:44:51,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:44:51,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2021-08-21 18:44:51,066 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 48 [2021-08-21 18:44:51,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:44:51,066 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2021-08-21 18:44:51,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.5573770491803278) internal successors, (95), 60 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:44:51,066 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2021-08-21 18:44:51,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-21 18:44:51,067 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:44:51,067 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:44:51,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-21 18:44:51,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:44:51,281 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:44:51,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:44:51,281 INFO L82 PathProgramCache]: Analyzing trace with hash -609698927, now seen corresponding path program 9 times [2021-08-21 18:44:51,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:44:51,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258070158] [2021-08-21 18:44:51,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:44:51,281 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:44:51,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:44:51,468 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:44:51,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:44:51,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258070158] [2021-08-21 18:44:51,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258070158] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:44:51,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531113465] [2021-08-21 18:44:51,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:44:51,469 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:44:51,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:44:51,478 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) [2021-08-21 18:44:51,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-21 18:44:51,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 18:44:51,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:44:51,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 18:44:51,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:44:52,106 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 11 treesize of output 7 [2021-08-21 18:44:52,155 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:44:52,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531113465] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:44:52,155 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:44:52,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-21 18:44:52,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566594931] [2021-08-21 18:44:52,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:44:52,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:44:52,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:44:52,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:44:52,157 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand has 23 states, 23 states have (on average 4.260869565217392) internal successors, (98), 22 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:44:52,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:44:52,514 INFO L93 Difference]: Finished difference Result 91 states and 94 transitions. [2021-08-21 18:44:52,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 18:44:52,514 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.260869565217392) internal successors, (98), 22 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-08-21 18:44:52,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:44:52,515 INFO L225 Difference]: With dead ends: 91 [2021-08-21 18:44:52,515 INFO L226 Difference]: Without dead ends: 91 [2021-08-21 18:44:52,515 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 425.3ms TimeCoverageRelationStatistics Valid=196, Invalid=1064, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 18:44:52,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-08-21 18:44:52,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 54. [2021-08-21 18:44:52,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 53 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:44:52,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2021-08-21 18:44:52,518 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 52 [2021-08-21 18:44:52,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:44:52,518 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2021-08-21 18:44:52,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.260869565217392) internal successors, (98), 22 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:44:52,519 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2021-08-21 18:44:52,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-21 18:44:52,519 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:44:52,519 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:44:52,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-21 18:44:52,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-08-21 18:44:52,741 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:44:52,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:44:52,741 INFO L82 PathProgramCache]: Analyzing trace with hash -484197691, now seen corresponding path program 10 times [2021-08-21 18:44:52,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:44:52,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489432854] [2021-08-21 18:44:52,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:44:52,742 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:44:52,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:44:52,806 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 55 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:44:52,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:44:52,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489432854] [2021-08-21 18:44:52,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489432854] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:44:52,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934327891] [2021-08-21 18:44:52,807 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:44:52,807 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:44:52,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:44:52,808 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) [2021-08-21 18:44:52,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-21 18:44:53,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:44:53,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:44:53,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 18:44:53,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:44:53,397 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 55 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:44:53,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934327891] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:44:53,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:44:53,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-21 18:44:53,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272848565] [2021-08-21 18:44:53,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:44:53,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:44:53,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:44:53,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:44:53,399 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:44:53,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:44:53,429 INFO L93 Difference]: Finished difference Result 91 states and 93 transitions. [2021-08-21 18:44:53,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:44:53,430 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-08-21 18:44:53,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:44:53,430 INFO L225 Difference]: With dead ends: 91 [2021-08-21 18:44:53,431 INFO L226 Difference]: Without dead ends: 64 [2021-08-21 18:44:53,431 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 20.7ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:44:53,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-21 18:44:53,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2021-08-21 18:44:53,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 57 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:44:53,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2021-08-21 18:44:53,433 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 53 [2021-08-21 18:44:53,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:44:53,433 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2021-08-21 18:44:53,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:44:53,434 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2021-08-21 18:44:53,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 18:44:53,434 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:44:53,434 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:44:53,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-21 18:44:53,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-21 18:44:53,645 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:44:53,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:44:53,646 INFO L82 PathProgramCache]: Analyzing trace with hash -685778943, now seen corresponding path program 11 times [2021-08-21 18:44:53,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:44:53,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69014201] [2021-08-21 18:44:53,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:44:53,646 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:44:53,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:44:55,542 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:44:55,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:44:55,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69014201] [2021-08-21 18:44:55,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69014201] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:44:55,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618541590] [2021-08-21 18:44:55,543 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:44:55,543 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:44:55,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:44:55,573 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) [2021-08-21 18:44:55,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-21 18:44:55,983 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 18:44:55,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:44:55,985 WARN L261 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 78 conjunts are in the unsatisfiable core [2021-08-21 18:44:55,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:44:58,601 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-21 18:44:58,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-21 18:44:59,239 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:44:59,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618541590] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:44:59,240 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:44:59,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 35] total 73 [2021-08-21 18:44:59,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475382909] [2021-08-21 18:44:59,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-08-21 18:44:59,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:44:59,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-08-21 18:44:59,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=5210, Unknown=0, NotChecked=0, Total=5402 [2021-08-21 18:44:59,243 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 74 states, 74 states have (on average 1.527027027027027) internal successors, (113), 73 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:45:02,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:45:02,088 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2021-08-21 18:45:02,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 18:45:02,089 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.527027027027027) internal successors, (113), 73 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-21 18:45:02,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:45:02,089 INFO L225 Difference]: With dead ends: 101 [2021-08-21 18:45:02,089 INFO L226 Difference]: Without dead ends: 97 [2021-08-21 18:45:02,091 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 4847.6ms TimeCoverageRelationStatistics Valid=320, Invalid=8610, Unknown=0, NotChecked=0, Total=8930 [2021-08-21 18:45:02,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-08-21 18:45:02,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 72. [2021-08-21 18:45:02,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 71 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:45:02,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2021-08-21 18:45:02,094 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 57 [2021-08-21 18:45:02,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:45:02,094 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2021-08-21 18:45:02,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.527027027027027) internal successors, (113), 73 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:45:02,095 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2021-08-21 18:45:02,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-21 18:45:02,095 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:45:02,095 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:45:02,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-21 18:45:02,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-21 18:45:02,305 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:45:02,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:45:02,305 INFO L82 PathProgramCache]: Analyzing trace with hash 152237885, now seen corresponding path program 12 times [2021-08-21 18:45:02,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:45:02,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703297738] [2021-08-21 18:45:02,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:45:02,305 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:45:02,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:45:02,506 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:45:02,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:45:02,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703297738] [2021-08-21 18:45:02,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703297738] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:45:02,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074152109] [2021-08-21 18:45:02,507 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:45:02,508 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:45:02,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:45:02,508 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) [2021-08-21 18:45:02,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-21 18:45:03,069 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 18:45:03,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:45:03,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 18:45:03,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:45:03,371 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 11 treesize of output 7 [2021-08-21 18:45:03,416 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:45:03,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074152109] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:45:03,417 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:45:03,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-08-21 18:45:03,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922069219] [2021-08-21 18:45:03,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 18:45:03,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:45:03,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 18:45:03,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=588, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:45:03,418 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand has 26 states, 26 states have (on average 4.461538461538462) internal successors, (116), 25 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:45:03,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:45:03,749 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2021-08-21 18:45:03,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 18:45:03,750 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.461538461538462) internal successors, (116), 25 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-08-21 18:45:03,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:45:03,750 INFO L225 Difference]: With dead ends: 100 [2021-08-21 18:45:03,750 INFO L226 Difference]: Without dead ends: 100 [2021-08-21 18:45:03,751 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 469.6ms TimeCoverageRelationStatistics Valid=231, Invalid=1329, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:45:03,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-08-21 18:45:03,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 63. [2021-08-21 18:45:03,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.032258064516129) internal successors, (64), 62 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:45:03,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2021-08-21 18:45:03,753 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 61 [2021-08-21 18:45:03,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:45:03,753 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2021-08-21 18:45:03,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.461538461538462) internal successors, (116), 25 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:45:03,754 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2021-08-21 18:45:03,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 18:45:03,754 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:45:03,754 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:45:03,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-21 18:45:03,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-21 18:45:03,961 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:45:03,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:45:03,961 INFO L82 PathProgramCache]: Analyzing trace with hash -187104879, now seen corresponding path program 13 times [2021-08-21 18:45:03,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:45:03,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714476982] [2021-08-21 18:45:03,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:45:03,961 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:45:03,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:45:04,027 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 81 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:45:04,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:45:04,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714476982] [2021-08-21 18:45:04,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714476982] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:45:04,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023934301] [2021-08-21 18:45:04,029 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:45:04,029 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:45:04,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:45:04,030 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) [2021-08-21 18:45:04,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-21 18:45:04,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:45:04,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 18:45:04,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:45:04,799 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 81 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:45:04,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023934301] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:45:04,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:45:04,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-21 18:45:04,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886219288] [2021-08-21 18:45:04,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 18:45:04,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:45:04,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 18:45:04,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:45:04,800 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:45:04,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:45:04,819 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2021-08-21 18:45:04,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:45:04,819 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 18:45:04,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:45:04,820 INFO L225 Difference]: With dead ends: 105 [2021-08-21 18:45:04,820 INFO L226 Difference]: Without dead ends: 73 [2021-08-21 18:45:04,820 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 28.6ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:45:04,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-08-21 18:45:04,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 67. [2021-08-21 18:45:04,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.0303030303030303) internal successors, (68), 66 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:45:04,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2021-08-21 18:45:04,821 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 62 [2021-08-21 18:45:04,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:45:04,821 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2021-08-21 18:45:04,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:45:04,822 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2021-08-21 18:45:04,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-08-21 18:45:04,822 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:45:04,822 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:45:04,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-21 18:45:05,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:45:05,023 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:45:05,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:45:05,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1331955669, now seen corresponding path program 14 times [2021-08-21 18:45:05,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:45:05,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300361338] [2021-08-21 18:45:05,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:45:05,023 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:45:05,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:45:07,557 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:45:07,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:45:07,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300361338] [2021-08-21 18:45:07,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300361338] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:45:07,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725256385] [2021-08-21 18:45:07,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:45:07,558 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:45:07,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:45:07,559 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) [2021-08-21 18:45:07,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-21 18:45:08,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:45:08,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:45:08,155 WARN L261 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 96 conjunts are in the unsatisfiable core [2021-08-21 18:45:08,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:45:11,381 INFO L354 Elim1Store]: treesize reduction 120, result has 0.8 percent of original size [2021-08-21 18:45:11,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 66 treesize of output 26 [2021-08-21 18:45:12,112 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:45:12,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725256385] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:45:12,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:45:12,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 41] total 72 [2021-08-21 18:45:12,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400560963] [2021-08-21 18:45:12,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-08-21 18:45:12,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:45:12,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-08-21 18:45:12,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=5069, Unknown=0, NotChecked=0, Total=5256 [2021-08-21 18:45:12,115 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand has 73 states, 73 states have (on average 1.5616438356164384) internal successors, (114), 72 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:45:14,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:45:14,590 INFO L93 Difference]: Finished difference Result 115 states and 117 transitions. [2021-08-21 18:45:14,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-21 18:45:14,591 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.5616438356164384) internal successors, (114), 72 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-08-21 18:45:14,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:45:14,592 INFO L225 Difference]: With dead ends: 115 [2021-08-21 18:45:14,592 INFO L226 Difference]: Without dead ends: 111 [2021-08-21 18:45:14,593 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1169 ImplicationChecksByTransitivity, 4732.0ms TimeCoverageRelationStatistics Valid=257, Invalid=7053, Unknown=0, NotChecked=0, Total=7310 [2021-08-21 18:45:14,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-08-21 18:45:14,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 81. [2021-08-21 18:45:14,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.0375) internal successors, (83), 80 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:45:14,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2021-08-21 18:45:14,595 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 66 [2021-08-21 18:45:14,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:45:14,595 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2021-08-21 18:45:14,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.5616438356164384) internal successors, (114), 72 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:45:14,595 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2021-08-21 18:45:14,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-08-21 18:45:14,595 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:45:14,595 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:45:14,618 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-08-21 18:45:14,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-21 18:45:14,809 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:45:14,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:45:14,809 INFO L82 PathProgramCache]: Analyzing trace with hash -994423783, now seen corresponding path program 15 times [2021-08-21 18:45:14,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:45:14,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212844393] [2021-08-21 18:45:14,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:45:14,809 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:45:14,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:45:15,041 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:45:15,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:45:15,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212844393] [2021-08-21 18:45:15,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212844393] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:45:15,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5394761] [2021-08-21 18:45:15,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:45:15,041 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:45:15,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:45:15,042 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) [2021-08-21 18:45:15,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-21 18:45:15,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 18:45:15,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:45:15,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 18:45:15,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:45:16,240 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 11 treesize of output 7 [2021-08-21 18:45:16,284 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:45:16,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5394761] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:45:16,284 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:45:16,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-08-21 18:45:16,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234859954] [2021-08-21 18:45:16,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 18:45:16,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:45:16,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 18:45:16,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=800, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:45:16,286 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand has 30 states, 30 states have (on average 4.466666666666667) internal successors, (134), 29 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:45:16,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:45:16,828 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2021-08-21 18:45:16,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:45:16,828 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.466666666666667) internal successors, (134), 29 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-08-21 18:45:16,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:45:16,829 INFO L225 Difference]: With dead ends: 114 [2021-08-21 18:45:16,829 INFO L226 Difference]: Without dead ends: 114 [2021-08-21 18:45:16,830 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 709.3ms TimeCoverageRelationStatistics Valid=284, Invalid=1786, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 18:45:16,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-08-21 18:45:16,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 72. [2021-08-21 18:45:16,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:45:16,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2021-08-21 18:45:16,831 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 70 [2021-08-21 18:45:16,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:45:16,832 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2021-08-21 18:45:16,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.466666666666667) internal successors, (134), 29 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:45:16,832 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2021-08-21 18:45:16,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-08-21 18:45:16,832 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:45:16,832 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:45:16,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-21 18:45:17,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-21 18:45:17,033 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:45:17,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:45:17,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1533176259, now seen corresponding path program 16 times [2021-08-21 18:45:17,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:45:17,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849772390] [2021-08-21 18:45:17,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:45:17,033 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:45:17,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:45:17,108 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 112 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:45:17,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:45:17,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849772390] [2021-08-21 18:45:17,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849772390] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:45:17,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481603497] [2021-08-21 18:45:17,109 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:45:17,109 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:45:17,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:45:17,110 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) [2021-08-21 18:45:17,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-21 18:45:17,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:45:17,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:45:17,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 18:45:17,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:45:18,175 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 112 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:45:18,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481603497] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:45:18,175 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:45:18,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 18:45:18,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714280426] [2021-08-21 18:45:18,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 18:45:18,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:45:18,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 18:45:18,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:45:18,176 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 10 states, 10 states have (on average 7.7) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:45:18,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:45:18,202 INFO L93 Difference]: Finished difference Result 119 states and 121 transitions. [2021-08-21 18:45:18,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 18:45:18,202 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-08-21 18:45:18,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:45:18,202 INFO L225 Difference]: With dead ends: 119 [2021-08-21 18:45:18,202 INFO L226 Difference]: Without dead ends: 82 [2021-08-21 18:45:18,203 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 33.6ms TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:45:18,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-08-21 18:45:18,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 76. [2021-08-21 18:45:18,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 75 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:45:18,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2021-08-21 18:45:18,204 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 71 [2021-08-21 18:45:18,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:45:18,205 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2021-08-21 18:45:18,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:45:18,205 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2021-08-21 18:45:18,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-21 18:45:18,205 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:45:18,205 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:45:18,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-08-21 18:45:18,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:45:18,409 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:45:18,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:45:18,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1835312007, now seen corresponding path program 17 times [2021-08-21 18:45:18,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:45:18,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117236] [2021-08-21 18:45:18,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:45:18,409 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:45:18,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:45:21,794 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 0 proven. 178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:45:21,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:45:21,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117236] [2021-08-21 18:45:21,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117236] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:45:21,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388860584] [2021-08-21 18:45:21,794 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:45:21,794 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:45:21,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:45:21,795 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) [2021-08-21 18:45:21,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-21 18:45:22,662 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-21 18:45:22,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:45:22,664 WARN L261 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 110 conjunts are in the unsatisfiable core [2021-08-21 18:45:22,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:45:27,873 INFO L354 Elim1Store]: treesize reduction 170, result has 0.6 percent of original size [2021-08-21 18:45:27,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 74 treesize of output 30 [2021-08-21 18:45:28,688 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 0 proven. 178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:45:28,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388860584] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:45:28,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:45:28,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 47] total 99 [2021-08-21 18:45:28,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137407259] [2021-08-21 18:45:28,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2021-08-21 18:45:28,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:45:28,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-08-21 18:45:28,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=9642, Unknown=0, NotChecked=0, Total=9900 [2021-08-21 18:45:28,692 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand has 100 states, 100 states have (on average 1.49) internal successors, (149), 99 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:45:32,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:45:32,736 INFO L93 Difference]: Finished difference Result 129 states and 131 transitions. [2021-08-21 18:45:32,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-21 18:45:32,737 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.49) internal successors, (149), 99 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-21 18:45:32,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:45:32,737 INFO L225 Difference]: With dead ends: 129 [2021-08-21 18:45:32,737 INFO L226 Difference]: Without dead ends: 125 [2021-08-21 18:45:32,739 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2423 ImplicationChecksByTransitivity, 8416.6ms TimeCoverageRelationStatistics Valid=366, Invalid=13914, Unknown=0, NotChecked=0, Total=14280 [2021-08-21 18:45:32,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-08-21 18:45:32,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 90. [2021-08-21 18:45:32,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0337078651685394) internal successors, (92), 89 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:45:32,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2021-08-21 18:45:32,741 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 75 [2021-08-21 18:45:32,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:45:32,741 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2021-08-21 18:45:32,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.49) internal successors, (149), 99 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:45:32,742 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2021-08-21 18:45:32,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-08-21 18:45:32,742 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:45:32,742 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:45:32,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-21 18:45:32,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:45:32,965 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:45:32,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:45:32,965 INFO L82 PathProgramCache]: Analyzing trace with hash 596878517, now seen corresponding path program 18 times [2021-08-21 18:45:32,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:45:32,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583244194] [2021-08-21 18:45:32,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:45:32,965 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:45:32,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:45:33,229 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:45:33,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:45:33,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583244194] [2021-08-21 18:45:33,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583244194] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:45:33,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446631538] [2021-08-21 18:45:33,229 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:45:33,230 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:45:33,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:45:33,230 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) [2021-08-21 18:45:33,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-21 18:45:34,321 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-21 18:45:34,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:45:34,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 18:45:34,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:45:34,793 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 11 treesize of output 7 [2021-08-21 18:45:34,834 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:45:34,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446631538] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:45:34,835 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:45:34,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-08-21 18:45:34,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902102677] [2021-08-21 18:45:34,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-21 18:45:34,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:45:34,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-21 18:45:34,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1042, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 18:45:34,836 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand has 34 states, 34 states have (on average 4.470588235294118) internal successors, (152), 33 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:45:35,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:45:35,483 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2021-08-21 18:45:35,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 18:45:35,483 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.470588235294118) internal successors, (152), 33 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-08-21 18:45:35,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:45:35,484 INFO L225 Difference]: With dead ends: 128 [2021-08-21 18:45:35,484 INFO L226 Difference]: Without dead ends: 128 [2021-08-21 18:45:35,484 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 879.6ms TimeCoverageRelationStatistics Valid=344, Invalid=2308, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 18:45:35,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-08-21 18:45:35,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 81. [2021-08-21 18:45:35,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.025) internal successors, (82), 80 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:45:35,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2021-08-21 18:45:35,486 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 79 [2021-08-21 18:45:35,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:45:35,487 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2021-08-21 18:45:35,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.470588235294118) internal successors, (152), 33 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:45:35,487 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2021-08-21 18:45:35,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-21 18:45:35,487 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:45:35,487 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:45:35,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-21 18:45:35,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:45:35,704 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:45:35,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:45:35,704 INFO L82 PathProgramCache]: Analyzing trace with hash 984975385, now seen corresponding path program 19 times [2021-08-21 18:45:35,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:45:35,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762808701] [2021-08-21 18:45:35,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:45:35,705 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:45:35,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:45:35,791 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 148 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:45:35,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:45:35,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762808701] [2021-08-21 18:45:35,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762808701] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:45:35,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921709775] [2021-08-21 18:45:35,792 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:45:35,792 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:45:35,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:45:35,796 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) [2021-08-21 18:45:35,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-21 18:45:36,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:45:36,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 18:45:36,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:45:37,178 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 148 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:45:37,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921709775] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:45:37,178 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:45:37,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 18:45:37,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696172267] [2021-08-21 18:45:37,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 18:45:37,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:45:37,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 18:45:37,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:45:37,179 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:45:37,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:45:37,203 INFO L93 Difference]: Finished difference Result 133 states and 135 transitions. [2021-08-21 18:45:37,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 18:45:37,205 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-08-21 18:45:37,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:45:37,205 INFO L225 Difference]: With dead ends: 133 [2021-08-21 18:45:37,205 INFO L226 Difference]: Without dead ends: 91 [2021-08-21 18:45:37,205 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 41.1ms TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:45:37,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-08-21 18:45:37,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 85. [2021-08-21 18:45:37,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 84 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:45:37,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2021-08-21 18:45:37,207 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 80 [2021-08-21 18:45:37,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:45:37,207 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2021-08-21 18:45:37,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:45:37,207 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2021-08-21 18:45:37,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-08-21 18:45:37,208 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:45:37,208 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:45:37,230 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-08-21 18:45:37,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-08-21 18:45:37,417 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:45:37,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:45:37,417 INFO L82 PathProgramCache]: Analyzing trace with hash -938670755, now seen corresponding path program 20 times [2021-08-21 18:45:37,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:45:37,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185727164] [2021-08-21 18:45:37,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:45:37,418 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:45:37,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:45:41,641 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 239 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:45:41,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:45:41,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185727164] [2021-08-21 18:45:41,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185727164] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:45:41,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093391858] [2021-08-21 18:45:41,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:45:41,642 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:45:41,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:45:41,643 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) [2021-08-21 18:45:41,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-21 18:45:42,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:45:42,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:45:42,791 WARN L261 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 130 conjunts are in the unsatisfiable core [2021-08-21 18:45:42,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:45:49,655 INFO L354 Elim1Store]: treesize reduction 252, result has 0.4 percent of original size [2021-08-21 18:45:49,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 90 treesize of output 34 [2021-08-21 18:45:50,572 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 239 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:45:50,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093391858] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:45:50,572 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:45:50,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 53] total 112 [2021-08-21 18:45:50,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887376807] [2021-08-21 18:45:50,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2021-08-21 18:45:50,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:45:50,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2021-08-21 18:45:50,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=12365, Unknown=0, NotChecked=0, Total=12656 [2021-08-21 18:45:50,574 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 113 states, 113 states have (on average 1.4778761061946903) internal successors, (167), 112 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:45:56,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:45:56,028 INFO L93 Difference]: Finished difference Result 143 states and 145 transitions. [2021-08-21 18:45:56,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-08-21 18:45:56,029 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 1.4778761061946903) internal successors, (167), 112 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-08-21 18:45:56,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:45:56,029 INFO L225 Difference]: With dead ends: 143 [2021-08-21 18:45:56,029 INFO L226 Difference]: Without dead ends: 139 [2021-08-21 18:45:56,030 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3070 ImplicationChecksByTransitivity, 10865.2ms TimeCoverageRelationStatistics Valid=409, Invalid=17681, Unknown=0, NotChecked=0, Total=18090 [2021-08-21 18:45:56,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-08-21 18:45:56,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 99. [2021-08-21 18:45:56,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.030612244897959) internal successors, (101), 98 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:45:56,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2021-08-21 18:45:56,033 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 84 [2021-08-21 18:45:56,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:45:56,033 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2021-08-21 18:45:56,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 1.4778761061946903) internal successors, (167), 112 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:45:56,033 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2021-08-21 18:45:56,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-08-21 18:45:56,034 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:45:56,034 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:45:56,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-21 18:45:56,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-21 18:45:56,241 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:45:56,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:45:56,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1222885215, now seen corresponding path program 21 times [2021-08-21 18:45:56,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:45:56,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482996269] [2021-08-21 18:45:56,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:45:56,241 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:45:56,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:45:56,569 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 268 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:45:56,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:45:56,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482996269] [2021-08-21 18:45:56,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482996269] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:45:56,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621775508] [2021-08-21 18:45:56,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:45:56,569 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:45:56,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:45:56,573 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) [2021-08-21 18:45:56,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-21 18:45:58,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-08-21 18:45:58,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:45:58,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-21 18:45:58,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:45:58,554 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 11 treesize of output 7 [2021-08-21 18:45:58,601 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 268 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:45:58,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621775508] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:45:58,602 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:45:58,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-08-21 18:45:58,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314303605] [2021-08-21 18:45:58,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-21 18:45:58,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:45:58,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-21 18:45:58,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1316, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 18:45:58,603 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand has 38 states, 38 states have (on average 4.473684210526316) internal successors, (170), 37 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:45:59,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:45:59,388 INFO L93 Difference]: Finished difference Result 142 states and 144 transitions. [2021-08-21 18:45:59,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 18:45:59,389 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 4.473684210526316) internal successors, (170), 37 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-08-21 18:45:59,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:45:59,389 INFO L225 Difference]: With dead ends: 142 [2021-08-21 18:45:59,389 INFO L226 Difference]: Without dead ends: 142 [2021-08-21 18:45:59,390 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 1100.4ms TimeCoverageRelationStatistics Valid=409, Invalid=2897, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 18:45:59,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-08-21 18:45:59,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 90. [2021-08-21 18:45:59,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0224719101123596) internal successors, (91), 89 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:45:59,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2021-08-21 18:45:59,392 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 88 [2021-08-21 18:45:59,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:45:59,392 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2021-08-21 18:45:59,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 4.473684210526316) internal successors, (170), 37 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:45:59,393 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2021-08-21 18:45:59,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-08-21 18:45:59,393 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:45:59,393 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:45:59,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-21 18:45:59,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:45:59,609 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:45:59,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:45:59,609 INFO L82 PathProgramCache]: Analyzing trace with hash -149041739, now seen corresponding path program 22 times [2021-08-21 18:45:59,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:45:59,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946605693] [2021-08-21 18:45:59,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:45:59,609 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:45:59,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:45:59,713 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 189 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:45:59,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:45:59,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946605693] [2021-08-21 18:45:59,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946605693] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:45:59,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266315674] [2021-08-21 18:45:59,713 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:45:59,713 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:45:59,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:45:59,714 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) [2021-08-21 18:45:59,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-21 18:46:01,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:46:01,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:46:01,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 18:46:01,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:46:01,554 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 189 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:01,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266315674] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:01,554 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:46:01,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 18:46:01,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761890870] [2021-08-21 18:46:01,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:46:01,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:01,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:46:01,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:46:01,555 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand has 12 states, 12 states have (on average 7.916666666666667) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:01,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:46:01,582 INFO L93 Difference]: Finished difference Result 147 states and 149 transitions. [2021-08-21 18:46:01,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 18:46:01,582 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.916666666666667) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-08-21 18:46:01,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:46:01,583 INFO L225 Difference]: With dead ends: 147 [2021-08-21 18:46:01,583 INFO L226 Difference]: Without dead ends: 100 [2021-08-21 18:46:01,583 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:46:01,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-08-21 18:46:01,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 94. [2021-08-21 18:46:01,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.021505376344086) internal successors, (95), 93 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:01,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2021-08-21 18:46:01,585 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 89 [2021-08-21 18:46:01,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:46:01,585 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2021-08-21 18:46:01,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.916666666666667) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:01,585 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2021-08-21 18:46:01,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-08-21 18:46:01,585 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:46:01,586 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:46:01,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-21 18:46:01,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:01,793 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:46:01,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:46:01,793 INFO L82 PathProgramCache]: Analyzing trace with hash 996474097, now seen corresponding path program 23 times [2021-08-21 18:46:01,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:46:01,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174522996] [2021-08-21 18:46:01,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:01,793 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:46:01,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:07,164 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 0 proven. 309 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:07,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:46:07,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174522996] [2021-08-21 18:46:07,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174522996] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:07,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271831658] [2021-08-21 18:46:07,164 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:46:07,164 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:07,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:46:07,165 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) [2021-08-21 18:46:07,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-21 18:46:08,681 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-08-21 18:46:08,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:46:08,683 WARN L261 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 146 conjunts are in the unsatisfiable core [2021-08-21 18:46:08,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:46:17,905 INFO L354 Elim1Store]: treesize reduction 322, result has 0.3 percent of original size [2021-08-21 18:46:17,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 98 treesize of output 38 [2021-08-21 18:46:18,944 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 0 proven. 309 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:18,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271831658] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:18,944 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:46:18,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 60] total 126 [2021-08-21 18:46:18,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419443975] [2021-08-21 18:46:18,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2021-08-21 18:46:18,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:18,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2021-08-21 18:46:18,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=15677, Unknown=0, NotChecked=0, Total=16002 [2021-08-21 18:46:18,947 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand has 127 states, 127 states have (on average 1.4566929133858268) internal successors, (185), 126 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:28,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:46:28,334 INFO L93 Difference]: Finished difference Result 157 states and 159 transitions. [2021-08-21 18:46:28,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-08-21 18:46:28,335 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 1.4566929133858268) internal successors, (185), 126 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-08-21 18:46:28,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:46:28,335 INFO L225 Difference]: With dead ends: 157 [2021-08-21 18:46:28,335 INFO L226 Difference]: Without dead ends: 153 [2021-08-21 18:46:28,337 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4385 ImplicationChecksByTransitivity, 15981.8ms TimeCoverageRelationStatistics Valid=534, Invalid=25548, Unknown=0, NotChecked=0, Total=26082 [2021-08-21 18:46:28,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-08-21 18:46:28,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 108. [2021-08-21 18:46:28,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.02803738317757) internal successors, (110), 107 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:28,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2021-08-21 18:46:28,339 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 93 [2021-08-21 18:46:28,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:46:28,339 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2021-08-21 18:46:28,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 1.4566929133858268) internal successors, (185), 126 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:28,340 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2021-08-21 18:46:28,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-08-21 18:46:28,340 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:46:28,340 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:46:28,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-21 18:46:28,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-21 18:46:28,545 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:46:28,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:46:28,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1647694291, now seen corresponding path program 24 times [2021-08-21 18:46:28,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:46:28,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913813318] [2021-08-21 18:46:28,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:28,546 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:46:28,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:28,927 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:28,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:46:28,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913813318] [2021-08-21 18:46:28,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913813318] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:28,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322260124] [2021-08-21 18:46:28,929 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:46:28,929 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:28,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:46:28,933 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) [2021-08-21 18:46:28,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-21 18:46:30,794 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-08-21 18:46:30,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:46:30,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-21 18:46:30,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:46:31,496 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 11 treesize of output 7 [2021-08-21 18:46:31,550 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:31,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322260124] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:31,550 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:46:31,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-08-21 18:46:31,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019524145] [2021-08-21 18:46:31,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-21 18:46:31,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:31,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-21 18:46:31,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1703, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 18:46:31,552 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand has 43 states, 43 states have (on average 4.372093023255814) internal successors, (188), 42 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:32,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:46:32,525 INFO L93 Difference]: Finished difference Result 161 states and 164 transitions. [2021-08-21 18:46:32,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 18:46:32,526 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 4.372093023255814) internal successors, (188), 42 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-08-21 18:46:32,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:46:32,527 INFO L225 Difference]: With dead ends: 161 [2021-08-21 18:46:32,527 INFO L226 Difference]: Without dead ends: 161 [2021-08-21 18:46:32,527 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 1401.2ms TimeCoverageRelationStatistics Valid=506, Invalid=3784, Unknown=0, NotChecked=0, Total=4290 [2021-08-21 18:46:32,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-08-21 18:46:32,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 99. [2021-08-21 18:46:32,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.0204081632653061) internal successors, (100), 98 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:32,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2021-08-21 18:46:32,530 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 97 [2021-08-21 18:46:32,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:46:32,530 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2021-08-21 18:46:32,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 4.372093023255814) internal successors, (188), 42 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:32,530 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2021-08-21 18:46:32,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-08-21 18:46:32,531 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:46:32,531 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:46:32,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-21 18:46:32,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-21 18:46:32,731 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:46:32,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:46:32,732 INFO L82 PathProgramCache]: Analyzing trace with hash 2075488929, now seen corresponding path program 25 times [2021-08-21 18:46:32,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:46:32,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944151489] [2021-08-21 18:46:32,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:32,732 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:46:32,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:32,845 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 235 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:32,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:46:32,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944151489] [2021-08-21 18:46:32,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944151489] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:32,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898764052] [2021-08-21 18:46:32,846 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:46:32,846 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:32,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:46:32,847 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) [2021-08-21 18:46:32,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-21 18:46:34,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:34,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 18:46:34,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:46:34,965 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 235 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:34,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898764052] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:34,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:46:34,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 18:46:34,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529296449] [2021-08-21 18:46:34,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:46:34,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:34,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:46:34,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:46:34,967 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand has 13 states, 13 states have (on average 8.0) internal successors, (104), 12 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:34,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:46:34,997 INFO L93 Difference]: Finished difference Result 161 states and 163 transitions. [2021-08-21 18:46:34,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 18:46:34,997 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 8.0) internal successors, (104), 12 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-08-21 18:46:34,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:46:34,998 INFO L225 Difference]: With dead ends: 161 [2021-08-21 18:46:34,998 INFO L226 Difference]: Without dead ends: 109 [2021-08-21 18:46:34,998 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 58.4ms TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:46:34,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-08-21 18:46:34,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 103. [2021-08-21 18:46:35,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.0196078431372548) internal successors, (104), 102 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:35,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2021-08-21 18:46:35,000 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 98 [2021-08-21 18:46:35,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:46:35,000 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2021-08-21 18:46:35,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.0) internal successors, (104), 12 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:35,000 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2021-08-21 18:46:35,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-08-21 18:46:35,001 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:46:35,001 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:46:35,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-21 18:46:35,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-21 18:46:35,209 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:46:35,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:46:35,209 INFO L82 PathProgramCache]: Analyzing trace with hash -733370651, now seen corresponding path program 26 times [2021-08-21 18:46:35,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:46:35,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380123327] [2021-08-21 18:46:35,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:35,209 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:46:35,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:41,700 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 388 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:41,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:46:41,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380123327] [2021-08-21 18:46:41,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380123327] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:41,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636679917] [2021-08-21 18:46:41,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:46:41,701 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:41,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:46:41,702 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) [2021-08-21 18:46:41,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-21 18:46:43,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:46:43,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:46:43,610 WARN L261 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 160 conjunts are in the unsatisfiable core [2021-08-21 18:46:43,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:46:54,663 INFO L354 Elim1Store]: treesize reduction 432, result has 0.2 percent of original size [2021-08-21 18:46:54,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 114 treesize of output 42 [2021-08-21 18:46:55,781 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 388 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:55,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636679917] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:55,781 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:46:55,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 65] total 138 [2021-08-21 18:46:55,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248746584] [2021-08-21 18:46:55,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2021-08-21 18:46:55,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:55,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2021-08-21 18:46:55,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=18825, Unknown=0, NotChecked=0, Total=19182 [2021-08-21 18:46:55,783 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand has 139 states, 139 states have (on average 1.460431654676259) internal successors, (203), 138 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:04,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:47:04,121 INFO L93 Difference]: Finished difference Result 171 states and 173 transitions. [2021-08-21 18:47:04,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-08-21 18:47:04,121 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 1.460431654676259) internal successors, (203), 138 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2021-08-21 18:47:04,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:47:04,122 INFO L225 Difference]: With dead ends: 171 [2021-08-21 18:47:04,122 INFO L226 Difference]: Without dead ends: 167 [2021-08-21 18:47:04,123 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4595 ImplicationChecksByTransitivity, 17325.8ms TimeCoverageRelationStatistics Valid=495, Invalid=26565, Unknown=0, NotChecked=0, Total=27060 [2021-08-21 18:47:04,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-08-21 18:47:04,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 117. [2021-08-21 18:47:04,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0258620689655173) internal successors, (119), 116 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:04,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 119 transitions. [2021-08-21 18:47:04,126 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 119 transitions. Word has length 102 [2021-08-21 18:47:04,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:47:04,126 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 119 transitions. [2021-08-21 18:47:04,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 1.460431654676259) internal successors, (203), 138 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:04,126 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 119 transitions. [2021-08-21 18:47:04,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-08-21 18:47:04,127 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:47:04,127 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:47:04,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-21 18:47:04,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-21 18:47:04,341 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:47:04,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:47:04,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1553852119, now seen corresponding path program 27 times [2021-08-21 18:47:04,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:47:04,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656356609] [2021-08-21 18:47:04,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:47:04,342 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:47:04,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:47:04,765 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:04,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:47:04,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656356609] [2021-08-21 18:47:04,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656356609] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:04,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563914652] [2021-08-21 18:47:04,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:47:04,766 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:47:04,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:47:04,773 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) [2021-08-21 18:47:04,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-21 18:47:07,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-08-21 18:47:07,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:47:07,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-21 18:47:07,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:47:07,870 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 11 treesize of output 7 [2021-08-21 18:47:07,919 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:07,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563914652] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:07,919 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:47:07,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-08-21 18:47:07,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955990038] [2021-08-21 18:47:07,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-08-21 18:47:07,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:47:07,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-08-21 18:47:07,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=2049, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 18:47:07,921 INFO L87 Difference]: Start difference. First operand 117 states and 119 transitions. Second operand has 47 states, 47 states have (on average 4.382978723404255) internal successors, (206), 46 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:09,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:47:09,061 INFO L93 Difference]: Finished difference Result 175 states and 178 transitions. [2021-08-21 18:47:09,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 18:47:09,061 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 4.382978723404255) internal successors, (206), 46 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-08-21 18:47:09,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:47:09,062 INFO L225 Difference]: With dead ends: 175 [2021-08-21 18:47:09,062 INFO L226 Difference]: Without dead ends: 175 [2021-08-21 18:47:09,063 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 1641.1ms TimeCoverageRelationStatistics Valid=583, Invalid=4529, Unknown=0, NotChecked=0, Total=5112 [2021-08-21 18:47:09,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-08-21 18:47:09,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 108. [2021-08-21 18:47:09,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.0186915887850467) internal successors, (109), 107 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:09,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2021-08-21 18:47:09,065 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 106 [2021-08-21 18:47:09,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:47:09,065 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2021-08-21 18:47:09,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 4.382978723404255) internal successors, (206), 46 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:09,066 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2021-08-21 18:47:09,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-08-21 18:47:09,066 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:47:09,066 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:47:09,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-21 18:47:09,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:47:09,281 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:47:09,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:47:09,281 INFO L82 PathProgramCache]: Analyzing trace with hash -726605523, now seen corresponding path program 28 times [2021-08-21 18:47:09,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:47:09,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777997990] [2021-08-21 18:47:09,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:47:09,281 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:47:09,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:47:09,417 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 286 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:09,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:47:09,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777997990] [2021-08-21 18:47:09,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777997990] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:09,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669242760] [2021-08-21 18:47:09,418 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:47:09,418 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:47:09,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:47:09,419 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) [2021-08-21 18:47:09,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-21 18:47:11,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:47:11,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:47:11,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 18:47:11,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:47:12,230 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 286 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:12,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669242760] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:12,230 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:47:12,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-21 18:47:12,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516606288] [2021-08-21 18:47:12,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 18:47:12,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:47:12,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 18:47:12,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:47:12,231 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand has 14 states, 14 states have (on average 8.071428571428571) internal successors, (113), 13 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:12,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:47:12,284 INFO L93 Difference]: Finished difference Result 175 states and 177 transitions. [2021-08-21 18:47:12,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 18:47:12,284 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 8.071428571428571) internal successors, (113), 13 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-08-21 18:47:12,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:47:12,285 INFO L225 Difference]: With dead ends: 175 [2021-08-21 18:47:12,285 INFO L226 Difference]: Without dead ends: 118 [2021-08-21 18:47:12,285 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 70.9ms TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:47:12,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-08-21 18:47:12,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 112. [2021-08-21 18:47:12,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.018018018018018) internal successors, (113), 111 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:12,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2021-08-21 18:47:12,288 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 107 [2021-08-21 18:47:12,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:47:12,288 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2021-08-21 18:47:12,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.071428571428571) internal successors, (113), 13 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:12,288 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2021-08-21 18:47:12,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-08-21 18:47:12,288 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:47:12,289 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:47:12,319 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-08-21 18:47:12,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:47:12,501 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:47:12,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:47:12,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1323746967, now seen corresponding path program 29 times [2021-08-21 18:47:12,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:47:12,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211132795] [2021-08-21 18:47:12,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:47:12,502 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:47:12,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:47:20,433 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 0 proven. 476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:20,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:47:20,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211132795] [2021-08-21 18:47:20,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211132795] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:20,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186801108] [2021-08-21 18:47:20,434 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:47:20,434 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:47:20,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:47:20,434 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:47:20,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-21 18:47:22,826 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-08-21 18:47:22,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:47:22,828 WARN L261 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 174 conjunts are in the unsatisfiable core [2021-08-21 18:47:22,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:47:36,392 INFO L354 Elim1Store]: treesize reduction 522, result has 0.2 percent of original size [2021-08-21 18:47:36,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 122 treesize of output 46 [2021-08-21 18:47:37,605 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 0 proven. 476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:37,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186801108] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:37,606 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:47:37,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 71] total 151 [2021-08-21 18:47:37,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752627083] [2021-08-21 18:47:37,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 152 states [2021-08-21 18:47:37,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:47:37,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2021-08-21 18:47:37,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=22562, Unknown=0, NotChecked=0, Total=22952 [2021-08-21 18:47:37,608 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand has 152 states, 152 states have (on average 1.4539473684210527) internal successors, (221), 151 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:51,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:47:51,196 INFO L93 Difference]: Finished difference Result 185 states and 187 transitions. [2021-08-21 18:47:51,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-08-21 18:47:51,198 INFO L78 Accepts]: Start accepts. Automaton has has 152 states, 152 states have (on average 1.4539473684210527) internal successors, (221), 151 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-08-21 18:47:51,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:47:51,199 INFO L225 Difference]: With dead ends: 185 [2021-08-21 18:47:51,199 INFO L226 Difference]: Without dead ends: 181 [2021-08-21 18:47:51,201 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6099 ImplicationChecksByTransitivity, 23487.0ms TimeCoverageRelationStatistics Valid=620, Invalid=35670, Unknown=0, NotChecked=0, Total=36290 [2021-08-21 18:47:51,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-08-21 18:47:51,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 126. [2021-08-21 18:47:51,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.024) internal successors, (128), 125 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:51,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 128 transitions. [2021-08-21 18:47:51,205 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 128 transitions. Word has length 111 [2021-08-21 18:47:51,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:47:51,205 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 128 transitions. [2021-08-21 18:47:51,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 152 states, 152 states have (on average 1.4539473684210527) internal successors, (221), 151 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:51,205 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 128 transitions. [2021-08-21 18:47:51,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-08-21 18:47:51,206 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:47:51,206 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:47:51,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-21 18:47:51,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-08-21 18:47:51,422 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:47:51,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:47:51,422 INFO L82 PathProgramCache]: Analyzing trace with hash -186444891, now seen corresponding path program 30 times [2021-08-21 18:47:51,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:47:51,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750839607] [2021-08-21 18:47:51,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:47:51,423 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:47:51,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:47:51,896 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 0 proven. 517 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:51,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:47:51,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750839607] [2021-08-21 18:47:51,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750839607] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:51,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610753404] [2021-08-21 18:47:51,896 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:47:51,897 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:47:51,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:47:51,902 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:47:51,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-21 18:47:54,774 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-08-21 18:47:54,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:47:54,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-21 18:47:54,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:47:55,660 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 11 treesize of output 7 [2021-08-21 18:47:55,710 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 0 proven. 517 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:55,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610753404] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:55,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:47:55,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 49 [2021-08-21 18:47:55,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926204273] [2021-08-21 18:47:55,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-08-21 18:47:55,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:47:55,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-08-21 18:47:55,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=2330, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 18:47:55,711 INFO L87 Difference]: Start difference. First operand 126 states and 128 transitions. Second operand has 50 states, 50 states have (on average 4.48) internal successors, (224), 49 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:56,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:47:56,956 INFO L93 Difference]: Finished difference Result 184 states and 186 transitions. [2021-08-21 18:47:56,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 18:47:56,958 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.48) internal successors, (224), 49 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-08-21 18:47:56,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:47:56,958 INFO L225 Difference]: With dead ends: 184 [2021-08-21 18:47:56,958 INFO L226 Difference]: Without dead ends: 184 [2021-08-21 18:47:56,959 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 1827.4ms TimeCoverageRelationStatistics Valid=634, Invalid=5066, Unknown=0, NotChecked=0, Total=5700 [2021-08-21 18:47:56,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-08-21 18:47:56,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 117. [2021-08-21 18:47:56,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 116 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:56,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2021-08-21 18:47:56,962 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 115 [2021-08-21 18:47:56,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:47:56,962 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2021-08-21 18:47:56,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.48) internal successors, (224), 49 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:56,962 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2021-08-21 18:47:56,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-08-21 18:47:56,963 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:47:56,963 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:47:56,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-21 18:47:57,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:47:57,173 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:47:57,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:47:57,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1509146327, now seen corresponding path program 31 times [2021-08-21 18:47:57,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:47:57,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482197951] [2021-08-21 18:47:57,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:47:57,173 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:47:57,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:47:57,325 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 342 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:57,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:47:57,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482197951] [2021-08-21 18:47:57,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482197951] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:57,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961147526] [2021-08-21 18:47:57,326 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:47:57,326 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:47:57,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:47:57,327 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:47:57,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-21 18:48:00,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:48:00,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 18:48:00,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:48:00,609 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 342 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:48:00,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961147526] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:00,609 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:48:00,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 18:48:00,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467983446] [2021-08-21 18:48:00,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:48:00,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:48:00,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:48:00,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:48:00,610 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 15 states, 15 states have (on average 8.133333333333333) internal successors, (122), 14 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:00,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:48:00,646 INFO L93 Difference]: Finished difference Result 189 states and 191 transitions. [2021-08-21 18:48:00,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 18:48:00,646 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 8.133333333333333) internal successors, (122), 14 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-08-21 18:48:00,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:48:00,647 INFO L225 Difference]: With dead ends: 189 [2021-08-21 18:48:00,647 INFO L226 Difference]: Without dead ends: 127 [2021-08-21 18:48:00,647 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 80.8ms TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:48:00,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-08-21 18:48:00,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 121. [2021-08-21 18:48:00,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.0166666666666666) internal successors, (122), 120 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:00,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2021-08-21 18:48:00,649 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 116 [2021-08-21 18:48:00,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:48:00,649 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2021-08-21 18:48:00,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.133333333333333) internal successors, (122), 14 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:00,649 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2021-08-21 18:48:00,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-08-21 18:48:00,650 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:48:00,650 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:48:00,674 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-08-21 18:48:00,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:48:00,850 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:48:00,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:48:00,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1094882195, now seen corresponding path program 32 times [2021-08-21 18:48:00,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:48:00,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416134331] [2021-08-21 18:48:00,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:48:00,851 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:48:00,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:48:09,958 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 0 proven. 573 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:48:09,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:48:09,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416134331] [2021-08-21 18:48:09,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416134331] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:09,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994617354] [2021-08-21 18:48:09,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:48:09,959 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:48:09,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:48:09,965 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:48:09,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-21 18:48:12,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:48:12,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:48:12,887 WARN L261 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 194 conjunts are in the unsatisfiable core [2021-08-21 18:48:12,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:48:29,496 INFO L354 Elim1Store]: treesize reduction 660, result has 0.2 percent of original size [2021-08-21 18:48:29,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 138 treesize of output 50 [2021-08-21 18:48:30,890 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 0 proven. 573 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:48:30,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994617354] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:30,891 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:48:30,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 77] total 164 [2021-08-21 18:48:30,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850000452] [2021-08-21 18:48:30,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 165 states [2021-08-21 18:48:30,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:48:30,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 165 interpolants. [2021-08-21 18:48:30,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=26637, Unknown=0, NotChecked=0, Total=27060 [2021-08-21 18:48:30,893 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand has 165 states, 165 states have (on average 1.4484848484848485) internal successors, (239), 164 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:43,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:48:43,438 INFO L93 Difference]: Finished difference Result 199 states and 201 transitions. [2021-08-21 18:48:43,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-08-21 18:48:43,439 INFO L78 Accepts]: Start accepts. Automaton has has 165 states, 165 states have (on average 1.4484848484848485) internal successors, (239), 164 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-08-21 18:48:43,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:48:43,439 INFO L225 Difference]: With dead ends: 199 [2021-08-21 18:48:43,440 INFO L226 Difference]: Without dead ends: 195 [2021-08-21 18:48:43,441 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6428 ImplicationChecksByTransitivity, 25496.5ms TimeCoverageRelationStatistics Valid=581, Invalid=37249, Unknown=0, NotChecked=0, Total=37830 [2021-08-21 18:48:43,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-08-21 18:48:43,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 135. [2021-08-21 18:48:43,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.0223880597014925) internal successors, (137), 134 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:43,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 137 transitions. [2021-08-21 18:48:43,444 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 137 transitions. Word has length 120 [2021-08-21 18:48:43,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:48:43,444 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 137 transitions. [2021-08-21 18:48:43,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 165 states, 165 states have (on average 1.4484848484848485) internal successors, (239), 164 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:43,445 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 137 transitions. [2021-08-21 18:48:43,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-08-21 18:48:43,445 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:48:43,445 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:48:43,481 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-08-21 18:48:43,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-08-21 18:48:43,661 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:48:43,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:48:43,661 INFO L82 PathProgramCache]: Analyzing trace with hash 2023708081, now seen corresponding path program 33 times [2021-08-21 18:48:43,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:48:43,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045344203] [2021-08-21 18:48:43,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:48:43,662 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:48:43,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:48:44,191 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 0 proven. 618 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:48:44,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:48:44,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045344203] [2021-08-21 18:48:44,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045344203] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:44,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373693534] [2021-08-21 18:48:44,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:48:44,191 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:48:44,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:48:44,192 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:48:44,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-21 18:48:47,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-08-21 18:48:47,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:48:47,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 56 conjunts are in the unsatisfiable core [2021-08-21 18:48:47,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:48:48,689 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 11 treesize of output 7 [2021-08-21 18:48:48,742 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 0 proven. 618 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:48:48,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373693534] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:48,742 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:48:48,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2021-08-21 18:48:48,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852201542] [2021-08-21 18:48:48,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-08-21 18:48:48,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:48:48,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-08-21 18:48:48,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=2837, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 18:48:48,744 INFO L87 Difference]: Start difference. First operand 135 states and 137 transitions. Second operand has 55 states, 55 states have (on average 4.4) internal successors, (242), 54 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:50,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:48:50,311 INFO L93 Difference]: Finished difference Result 203 states and 206 transitions. [2021-08-21 18:48:50,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 18:48:50,312 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 4.4) internal successors, (242), 54 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-08-21 18:48:50,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:48:50,313 INFO L225 Difference]: With dead ends: 203 [2021-08-21 18:48:50,313 INFO L226 Difference]: Without dead ends: 203 [2021-08-21 18:48:50,314 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 2224.3ms TimeCoverageRelationStatistics Valid=752, Invalid=6220, Unknown=0, NotChecked=0, Total=6972 [2021-08-21 18:48:50,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-08-21 18:48:50,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 126. [2021-08-21 18:48:50,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.016) internal successors, (127), 125 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:50,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2021-08-21 18:48:50,316 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 124 [2021-08-21 18:48:50,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:48:50,316 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2021-08-21 18:48:50,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 4.4) internal successors, (242), 54 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:50,317 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2021-08-21 18:48:50,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-08-21 18:48:50,317 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:48:50,317 INFO L512 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:48:50,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-21 18:48:50,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-21 18:48:50,533 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:48:50,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:48:50,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1931259739, now seen corresponding path program 34 times [2021-08-21 18:48:50,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:48:50,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249700996] [2021-08-21 18:48:50,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:48:50,545 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:48:50,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:48:50,713 INFO L134 CoverageAnalysis]: Checked inductivity of 634 backedges. 403 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:48:50,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:48:50,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249700996] [2021-08-21 18:48:50,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249700996] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:50,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322324148] [2021-08-21 18:48:50,713 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:48:50,713 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:48:50,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:48:50,717 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:48:50,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-21 18:48:54,341 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:48:54,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:48:54,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 18:48:54,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:48:54,669 INFO L134 CoverageAnalysis]: Checked inductivity of 634 backedges. 403 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:48:54,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322324148] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:54,670 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:48:54,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-08-21 18:48:54,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781747881] [2021-08-21 18:48:54,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:48:54,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:48:54,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:48:54,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:48:54,671 INFO L87 Difference]: Start difference. First operand 126 states and 127 transitions. Second operand has 16 states, 16 states have (on average 8.1875) internal successors, (131), 15 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:54,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:48:54,708 INFO L93 Difference]: Finished difference Result 203 states and 205 transitions. [2021-08-21 18:48:54,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 18:48:54,708 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.1875) internal successors, (131), 15 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-08-21 18:48:54,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:48:54,709 INFO L225 Difference]: With dead ends: 203 [2021-08-21 18:48:54,709 INFO L226 Difference]: Without dead ends: 136 [2021-08-21 18:48:54,709 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 91.5ms TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:48:54,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-08-21 18:48:54,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 130. [2021-08-21 18:48:54,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.0155038759689923) internal successors, (131), 129 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:54,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 131 transitions. [2021-08-21 18:48:54,711 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 131 transitions. Word has length 125 [2021-08-21 18:48:54,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:48:54,712 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 131 transitions. [2021-08-21 18:48:54,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.1875) internal successors, (131), 15 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:54,712 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 131 transitions. [2021-08-21 18:48:54,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-08-21 18:48:54,712 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:48:54,712 INFO L512 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:48:54,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-21 18:48:54,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-21 18:48:54,933 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:48:54,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:48:54,933 INFO L82 PathProgramCache]: Analyzing trace with hash -455831071, now seen corresponding path program 35 times [2021-08-21 18:48:54,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:48:54,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642078660] [2021-08-21 18:48:54,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:48:54,933 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:48:54,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:05,697 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 0 proven. 679 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:49:05,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:05,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642078660] [2021-08-21 18:49:05,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642078660] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:05,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862726320] [2021-08-21 18:49:05,697 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:49:05,697 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:05,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:49:05,698 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:49:05,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-21 18:49:09,241 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-08-21 18:49:09,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:49:09,244 WARN L261 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 206 conjunts are in the unsatisfiable core [2021-08-21 18:49:09,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:49:29,001 INFO L354 Elim1Store]: treesize reduction 770, result has 0.1 percent of original size [2021-08-21 18:49:29,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 146 treesize of output 54 [2021-08-21 18:49:30,565 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 0 proven. 679 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:49:30,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862726320] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:30,565 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:49:30,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 83] total 177 [2021-08-21 18:49:30,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534617125] [2021-08-21 18:49:30,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 178 states [2021-08-21 18:49:30,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:49:30,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 178 interpolants. [2021-08-21 18:49:30,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=456, Invalid=31050, Unknown=0, NotChecked=0, Total=31506 [2021-08-21 18:49:30,568 INFO L87 Difference]: Start difference. First operand 130 states and 131 transitions. Second operand has 178 states, 178 states have (on average 1.4438202247191012) internal successors, (257), 177 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:49,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:49:49,104 INFO L93 Difference]: Finished difference Result 213 states and 215 transitions. [2021-08-21 18:49:49,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-08-21 18:49:49,105 INFO L78 Accepts]: Start accepts. Automaton has has 178 states, 178 states have (on average 1.4438202247191012) internal successors, (257), 177 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2021-08-21 18:49:49,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:49:49,106 INFO L225 Difference]: With dead ends: 213 [2021-08-21 18:49:49,106 INFO L226 Difference]: Without dead ends: 209 [2021-08-21 18:49:49,108 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8317 ImplicationChecksByTransitivity, 33494.6ms TimeCoverageRelationStatistics Valid=720, Invalid=48786, Unknown=0, NotChecked=0, Total=49506 [2021-08-21 18:49:49,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-08-21 18:49:49,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 144. [2021-08-21 18:49:49,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.020979020979021) internal successors, (146), 143 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:49,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 146 transitions. [2021-08-21 18:49:49,111 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 146 transitions. Word has length 129 [2021-08-21 18:49:49,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:49:49,111 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 146 transitions. [2021-08-21 18:49:49,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 178 states, 178 states have (on average 1.4438202247191012) internal successors, (257), 177 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:49,111 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 146 transitions. [2021-08-21 18:49:49,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-08-21 18:49:49,112 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:49,112 INFO L512 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:49:49,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-21 18:49:49,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:49,325 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:49:49,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:49,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1938478365, now seen corresponding path program 36 times [2021-08-21 18:49:49,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:49,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412754635] [2021-08-21 18:49:49,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:49,325 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:49,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:49,990 INFO L134 CoverageAnalysis]: Checked inductivity of 728 backedges. 0 proven. 728 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:49:49,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:49,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412754635] [2021-08-21 18:49:49,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412754635] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:49,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271328124] [2021-08-21 18:49:49,991 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:49:49,991 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:49,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:49:49,992 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:49:49,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-21 18:49:54,131 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-08-21 18:49:54,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:49:54,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 56 conjunts are in the unsatisfiable core [2021-08-21 18:49:54,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:49:55,284 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 11 treesize of output 7 [2021-08-21 18:49:55,338 INFO L134 CoverageAnalysis]: Checked inductivity of 728 backedges. 0 proven. 728 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:49:55,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271328124] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:55,339 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:49:55,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 57 [2021-08-21 18:49:55,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510953517] [2021-08-21 18:49:55,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-08-21 18:49:55,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:49:55,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-08-21 18:49:55,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=3166, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 18:49:55,340 INFO L87 Difference]: Start difference. First operand 144 states and 146 transitions. Second operand has 58 states, 58 states have (on average 4.482758620689655) internal successors, (260), 57 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:57,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:49:57,008 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2021-08-21 18:49:57,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 18:49:57,008 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 4.482758620689655) internal successors, (260), 57 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2021-08-21 18:49:57,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:49:57,009 INFO L225 Difference]: With dead ends: 212 [2021-08-21 18:49:57,009 INFO L226 Difference]: Without dead ends: 212 [2021-08-21 18:49:57,009 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 2476.2ms TimeCoverageRelationStatistics Valid=809, Invalid=6847, Unknown=0, NotChecked=0, Total=7656 [2021-08-21 18:49:57,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-08-21 18:49:57,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 135. [2021-08-21 18:49:57,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.0149253731343284) internal successors, (136), 134 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:57,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2021-08-21 18:49:57,012 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 133 [2021-08-21 18:49:57,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:49:57,012 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2021-08-21 18:49:57,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 4.482758620689655) internal successors, (260), 57 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:57,012 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2021-08-21 18:49:57,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-08-21 18:49:57,013 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:57,013 INFO L512 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:49:57,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-21 18:49:57,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-21 18:49:57,229 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:49:57,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:57,229 INFO L82 PathProgramCache]: Analyzing trace with hash -2039647311, now seen corresponding path program 37 times [2021-08-21 18:49:57,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:57,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685633089] [2021-08-21 18:49:57,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:57,230 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:57,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:57,411 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 469 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:49:57,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:57,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685633089] [2021-08-21 18:49:57,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685633089] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:57,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028541626] [2021-08-21 18:49:57,412 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:49:57,412 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:57,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:49:57,417 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:49:57,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-21 18:50:01,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:01,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 18:50:01,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:02,070 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 469 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:50:02,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028541626] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:02,071 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:02,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-08-21 18:50:02,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375678506] [2021-08-21 18:50:02,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 18:50:02,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:02,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 18:50:02,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:50:02,072 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand has 17 states, 17 states have (on average 8.235294117647058) internal successors, (140), 16 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:02,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:02,123 INFO L93 Difference]: Finished difference Result 217 states and 219 transitions. [2021-08-21 18:50:02,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 18:50:02,123 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 8.235294117647058) internal successors, (140), 16 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2021-08-21 18:50:02,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:02,124 INFO L225 Difference]: With dead ends: 217 [2021-08-21 18:50:02,124 INFO L226 Difference]: Without dead ends: 145 [2021-08-21 18:50:02,124 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 102.1ms TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:50:02,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-08-21 18:50:02,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 139. [2021-08-21 18:50:02,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.0144927536231885) internal successors, (140), 138 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:02,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2021-08-21 18:50:02,130 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 134 [2021-08-21 18:50:02,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:02,130 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2021-08-21 18:50:02,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 8.235294117647058) internal successors, (140), 16 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:02,130 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2021-08-21 18:50:02,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-08-21 18:50:02,131 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:02,131 INFO L512 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:02,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-21 18:50:02,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-21 18:50:02,353 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:50:02,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:02,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1955321333, now seen corresponding path program 38 times [2021-08-21 18:50:02,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:02,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118237365] [2021-08-21 18:50:02,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:02,353 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:02,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:14,706 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 0 proven. 794 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:50:14,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:14,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118237365] [2021-08-21 18:50:14,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118237365] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:14,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79183274] [2021-08-21 18:50:14,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:50:14,706 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:14,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:14,707 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:14,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-21 18:50:18,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:50:18,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:18,986 WARN L261 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 224 conjunts are in the unsatisfiable core [2021-08-21 18:50:18,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:36,839 INFO L354 Elim1Store]: treesize reduction 936, result has 0.1 percent of original size [2021-08-21 18:50:36,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 162 treesize of output 58 [2021-08-21 18:50:38,464 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 0 proven. 794 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:50:38,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79183274] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:38,465 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:38,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 89] total 152 [2021-08-21 18:50:38,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958710382] [2021-08-21 18:50:38,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 153 states [2021-08-21 18:50:38,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:38,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2021-08-21 18:50:38,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=22877, Unknown=0, NotChecked=0, Total=23256 [2021-08-21 18:50:38,467 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand has 153 states, 153 states have (on average 1.477124183006536) internal successors, (226), 152 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:56,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:56,819 INFO L93 Difference]: Finished difference Result 227 states and 229 transitions. [2021-08-21 18:50:56,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-08-21 18:50:56,819 INFO L78 Accepts]: Start accepts. Automaton has has 153 states, 153 states have (on average 1.477124183006536) internal successors, (226), 152 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 138 [2021-08-21 18:50:56,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:56,820 INFO L225 Difference]: With dead ends: 227 [2021-08-21 18:50:56,820 INFO L226 Difference]: Without dead ends: 223 [2021-08-21 18:50:56,822 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 75 SyntacticMatches, 13 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5823 ImplicationChecksByTransitivity, 29855.0ms TimeCoverageRelationStatistics Valid=634, Invalid=37978, Unknown=0, NotChecked=0, Total=38612 [2021-08-21 18:50:56,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-08-21 18:50:56,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 153. [2021-08-21 18:50:56,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.019736842105263) internal successors, (155), 152 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:56,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 155 transitions. [2021-08-21 18:50:56,824 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 155 transitions. Word has length 138 [2021-08-21 18:50:56,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:56,824 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 155 transitions. [2021-08-21 18:50:56,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 153 states, 153 states have (on average 1.477124183006536) internal successors, (226), 152 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:56,825 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 155 transitions. [2021-08-21 18:50:56,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-08-21 18:50:56,825 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:56,825 INFO L512 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:56,862 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-08-21 18:50:57,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:57,041 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:50:57,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:57,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1939376583, now seen corresponding path program 39 times [2021-08-21 18:50:57,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:57,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628019178] [2021-08-21 18:50:57,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:57,042 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:57,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:57,712 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 0 proven. 847 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:50:57,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:57,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628019178] [2021-08-21 18:50:57,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628019178] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:57,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381534587] [2021-08-21 18:50:57,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:50:57,712 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:57,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:57,713 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:57,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-21 18:51:02,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-08-21 18:51:02,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:51:02,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 64 conjunts are in the unsatisfiable core [2021-08-21 18:51:02,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:04,104 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 11 treesize of output 7 [2021-08-21 18:51:04,163 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 0 proven. 847 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:51:04,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381534587] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:04,164 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:04,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 62 [2021-08-21 18:51:04,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489467166] [2021-08-21 18:51:04,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-08-21 18:51:04,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:04,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-08-21 18:51:04,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=3753, Unknown=0, NotChecked=0, Total=3906 [2021-08-21 18:51:04,165 INFO L87 Difference]: Start difference. First operand 153 states and 155 transitions. Second operand has 63 states, 63 states have (on average 4.412698412698413) internal successors, (278), 62 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:06,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:06,159 INFO L93 Difference]: Finished difference Result 231 states and 234 transitions. [2021-08-21 18:51:06,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 18:51:06,160 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 4.412698412698413) internal successors, (278), 62 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2021-08-21 18:51:06,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:06,161 INFO L225 Difference]: With dead ends: 231 [2021-08-21 18:51:06,161 INFO L226 Difference]: Without dead ends: 231 [2021-08-21 18:51:06,161 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1193 ImplicationChecksByTransitivity, 2973.1ms TimeCoverageRelationStatistics Valid=941, Invalid=8179, Unknown=0, NotChecked=0, Total=9120 [2021-08-21 18:51:06,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-08-21 18:51:06,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 144. [2021-08-21 18:51:06,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.013986013986014) internal successors, (145), 143 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:06,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2021-08-21 18:51:06,163 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 142 [2021-08-21 18:51:06,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:06,163 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2021-08-21 18:51:06,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 4.412698412698413) internal successors, (278), 62 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:06,164 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2021-08-21 18:51:06,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-08-21 18:51:06,164 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:06,164 INFO L512 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:06,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-21 18:51:06,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-08-21 18:51:06,365 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:51:06,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:06,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1556192285, now seen corresponding path program 40 times [2021-08-21 18:51:06,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:06,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22722696] [2021-08-21 18:51:06,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:06,365 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:06,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:06,579 INFO L134 CoverageAnalysis]: Checked inductivity of 865 backedges. 540 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:51:06,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:06,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22722696] [2021-08-21 18:51:06,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22722696] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:06,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368121024] [2021-08-21 18:51:06,579 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:51:06,579 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:06,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:06,585 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:51:06,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-21 18:51:11,782 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:51:11,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:51:11,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 18:51:11,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:12,185 INFO L134 CoverageAnalysis]: Checked inductivity of 865 backedges. 540 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:51:12,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368121024] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:12,186 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:12,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-08-21 18:51:12,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094645289] [2021-08-21 18:51:12,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:51:12,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:12,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:51:12,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:51:12,187 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand has 18 states, 18 states have (on average 8.277777777777779) internal successors, (149), 17 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:12,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:12,233 INFO L93 Difference]: Finished difference Result 231 states and 233 transitions. [2021-08-21 18:51:12,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 18:51:12,233 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 8.277777777777779) internal successors, (149), 17 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2021-08-21 18:51:12,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:12,234 INFO L225 Difference]: With dead ends: 231 [2021-08-21 18:51:12,234 INFO L226 Difference]: Without dead ends: 154 [2021-08-21 18:51:12,234 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 119.0ms TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:51:12,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-08-21 18:51:12,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 148. [2021-08-21 18:51:12,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.0136054421768708) internal successors, (149), 147 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:12,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 149 transitions. [2021-08-21 18:51:12,236 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 149 transitions. Word has length 143 [2021-08-21 18:51:12,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:12,236 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 149 transitions. [2021-08-21 18:51:12,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 8.277777777777779) internal successors, (149), 17 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:12,237 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 149 transitions. [2021-08-21 18:51:12,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-08-21 18:51:12,237 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:12,237 INFO L512 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:12,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-21 18:51:12,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:12,441 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:51:12,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:12,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1899202137, now seen corresponding path program 41 times [2021-08-21 18:51:12,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:12,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904812474] [2021-08-21 18:51:12,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:12,442 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:12,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:27,083 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 0 proven. 918 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:51:27,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:27,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904812474] [2021-08-21 18:51:27,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904812474] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:27,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872439750] [2021-08-21 18:51:27,084 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:51:27,084 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:27,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:27,084 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:51:27,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-21 18:51:32,269 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-08-21 18:51:32,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:51:32,272 WARN L261 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 238 conjunts are in the unsatisfiable core [2021-08-21 18:51:32,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:00,326 INFO L354 Elim1Store]: treesize reduction 1066, result has 0.1 percent of original size [2021-08-21 18:52:00,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 170 treesize of output 62 [2021-08-21 18:52:02,086 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 0 proven. 918 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:52:02,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872439750] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:02,087 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:02,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 95] total 203 [2021-08-21 18:52:02,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060862080] [2021-08-21 18:52:02,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 204 states [2021-08-21 18:52:02,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:02,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 204 interpolants. [2021-08-21 18:52:02,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=522, Invalid=40890, Unknown=0, NotChecked=0, Total=41412 [2021-08-21 18:52:02,090 INFO L87 Difference]: Start difference. First operand 148 states and 149 transitions. Second operand has 204 states, 204 states have (on average 1.4362745098039216) internal successors, (293), 203 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:28,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:28,554 INFO L93 Difference]: Finished difference Result 241 states and 243 transitions. [2021-08-21 18:52:28,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-08-21 18:52:28,555 INFO L78 Accepts]: Start accepts. Automaton has has 204 states, 204 states have (on average 1.4362745098039216) internal successors, (293), 203 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2021-08-21 18:52:28,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:28,556 INFO L225 Difference]: With dead ends: 241 [2021-08-21 18:52:28,556 INFO L226 Difference]: Without dead ends: 237 [2021-08-21 18:52:28,559 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10879 ImplicationChecksByTransitivity, 46681.0ms TimeCoverageRelationStatistics Valid=820, Invalid=63950, Unknown=0, NotChecked=0, Total=64770 [2021-08-21 18:52:28,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-08-21 18:52:28,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 162. [2021-08-21 18:52:28,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.0186335403726707) internal successors, (164), 161 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:28,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 164 transitions. [2021-08-21 18:52:28,561 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 164 transitions. Word has length 147 [2021-08-21 18:52:28,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:28,562 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 164 transitions. [2021-08-21 18:52:28,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 204 states, 204 states have (on average 1.4362745098039216) internal successors, (293), 203 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:28,562 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 164 transitions. [2021-08-21 18:52:28,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-08-21 18:52:28,563 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:28,563 INFO L512 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:28,600 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-08-21 18:52:28,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:28,781 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:52:28,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:28,781 INFO L82 PathProgramCache]: Analyzing trace with hash -907152747, now seen corresponding path program 42 times [2021-08-21 18:52:28,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:28,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545118645] [2021-08-21 18:52:28,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:28,781 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:28,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:29,602 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:52:29,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:29,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545118645] [2021-08-21 18:52:29,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545118645] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:29,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145571248] [2021-08-21 18:52:29,603 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:52:29,603 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:29,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:29,603 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:52:29,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-21 18:52:35,545 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-08-21 18:52:35,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:35,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 64 conjunts are in the unsatisfiable core [2021-08-21 18:52:35,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:36,994 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 11 treesize of output 7 [2021-08-21 18:52:37,055 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:52:37,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145571248] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:37,055 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:37,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 65 [2021-08-21 18:52:37,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656195213] [2021-08-21 18:52:37,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-08-21 18:52:37,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:37,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-08-21 18:52:37,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=4130, Unknown=0, NotChecked=0, Total=4290 [2021-08-21 18:52:37,056 INFO L87 Difference]: Start difference. First operand 162 states and 164 transitions. Second operand has 66 states, 66 states have (on average 4.484848484848484) internal successors, (296), 65 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:39,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:39,187 INFO L93 Difference]: Finished difference Result 240 states and 242 transitions. [2021-08-21 18:52:39,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 18:52:39,188 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 4.484848484848484) internal successors, (296), 65 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2021-08-21 18:52:39,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:39,189 INFO L225 Difference]: With dead ends: 240 [2021-08-21 18:52:39,189 INFO L226 Difference]: Without dead ends: 240 [2021-08-21 18:52:39,190 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1289 ImplicationChecksByTransitivity, 3267.9ms TimeCoverageRelationStatistics Valid=1004, Invalid=8896, Unknown=0, NotChecked=0, Total=9900 [2021-08-21 18:52:39,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-08-21 18:52:39,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 153. [2021-08-21 18:52:39,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.013157894736842) internal successors, (154), 152 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:39,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2021-08-21 18:52:39,193 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 151 [2021-08-21 18:52:39,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:39,193 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2021-08-21 18:52:39,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 4.484848484848484) internal successors, (296), 65 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:39,193 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2021-08-21 18:52:39,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-08-21 18:52:39,194 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:39,194 INFO L512 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:39,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-21 18:52:39,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-08-21 18:52:39,409 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:52:39,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:39,409 INFO L82 PathProgramCache]: Analyzing trace with hash 806128185, now seen corresponding path program 43 times [2021-08-21 18:52:39,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:39,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127351919] [2021-08-21 18:52:39,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:39,409 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:39,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:39,679 INFO L134 CoverageAnalysis]: Checked inductivity of 994 backedges. 616 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:52:39,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:39,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127351919] [2021-08-21 18:52:39,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127351919] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:39,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719627190] [2021-08-21 18:52:39,680 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:52:39,680 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:39,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:39,681 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:52:39,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-21 18:52:45,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:45,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 18:52:45,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:46,194 INFO L134 CoverageAnalysis]: Checked inductivity of 994 backedges. 616 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:52:46,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719627190] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:46,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:46,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-08-21 18:52:46,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113125474] [2021-08-21 18:52:46,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 18:52:46,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:46,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 18:52:46,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:52:46,196 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand has 19 states, 19 states have (on average 8.31578947368421) internal successors, (158), 18 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:46,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:46,244 INFO L93 Difference]: Finished difference Result 245 states and 247 transitions. [2021-08-21 18:52:46,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 18:52:46,244 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 8.31578947368421) internal successors, (158), 18 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2021-08-21 18:52:46,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:46,245 INFO L225 Difference]: With dead ends: 245 [2021-08-21 18:52:46,245 INFO L226 Difference]: Without dead ends: 163 [2021-08-21 18:52:46,245 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 143.4ms TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:52:46,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-08-21 18:52:46,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 157. [2021-08-21 18:52:46,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.0128205128205128) internal successors, (158), 156 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:46,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2021-08-21 18:52:46,247 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 152 [2021-08-21 18:52:46,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:46,247 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2021-08-21 18:52:46,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 8.31578947368421) internal successors, (158), 18 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:46,247 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2021-08-21 18:52:46,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-08-21 18:52:46,248 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:46,248 INFO L512 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:46,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-21 18:52:46,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-21 18:52:46,453 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:52:46,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:46,453 INFO L82 PathProgramCache]: Analyzing trace with hash -312974467, now seen corresponding path program 44 times [2021-08-21 18:52:46,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:46,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315756715] [2021-08-21 18:52:46,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:46,453 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:46,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:03,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1051 backedges. 0 proven. 1051 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:53:03,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:03,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315756715] [2021-08-21 18:53:03,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315756715] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:03,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804661577] [2021-08-21 18:53:03,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:03,393 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:03,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:03,394 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:53:03,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-21 18:53:09,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:09,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:09,469 WARN L261 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 258 conjunts are in the unsatisfiable core [2021-08-21 18:53:09,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:42,177 INFO L354 Elim1Store]: treesize reduction 1260, result has 0.1 percent of original size [2021-08-21 18:53:42,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 186 treesize of output 66 [2021-08-21 18:53:43,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1051 backedges. 0 proven. 1051 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:53:43,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804661577] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:43,982 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:43,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 101] total 216 [2021-08-21 18:53:43,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881382401] [2021-08-21 18:53:43,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 217 states [2021-08-21 18:53:43,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:43,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 217 interpolants. [2021-08-21 18:53:43,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=555, Invalid=46317, Unknown=0, NotChecked=0, Total=46872 [2021-08-21 18:53:43,985 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand has 217 states, 217 states have (on average 1.433179723502304) internal successors, (311), 216 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:14,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:14,941 INFO L93 Difference]: Finished difference Result 255 states and 257 transitions. [2021-08-21 18:54:14,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-08-21 18:54:14,942 INFO L78 Accepts]: Start accepts. Automaton has has 217 states, 217 states have (on average 1.433179723502304) internal successors, (311), 216 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2021-08-21 18:54:14,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:14,943 INFO L225 Difference]: With dead ends: 255 [2021-08-21 18:54:14,943 INFO L226 Difference]: Without dead ends: 251 [2021-08-21 18:54:14,945 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12289 ImplicationChecksByTransitivity, 53981.1ms TimeCoverageRelationStatistics Valid=870, Invalid=72300, Unknown=0, NotChecked=0, Total=73170 [2021-08-21 18:54:14,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-08-21 18:54:14,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 171. [2021-08-21 18:54:14,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.0176470588235293) internal successors, (173), 170 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:14,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 173 transitions. [2021-08-21 18:54:14,948 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 173 transitions. Word has length 156 [2021-08-21 18:54:14,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:14,948 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 173 transitions. [2021-08-21 18:54:14,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 217 states, 217 states have (on average 1.433179723502304) internal successors, (311), 216 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:14,949 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 173 transitions. [2021-08-21 18:54:14,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-08-21 18:54:14,949 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:14,949 INFO L512 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:14,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-08-21 18:54:15,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-21 18:54:15,150 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:54:15,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:15,150 INFO L82 PathProgramCache]: Analyzing trace with hash 47053505, now seen corresponding path program 45 times [2021-08-21 18:54:15,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:15,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621371246] [2021-08-21 18:54:15,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:15,151 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:15,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:15,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1112 backedges. 0 proven. 1112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:54:15,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:15,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621371246] [2021-08-21 18:54:15,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621371246] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:15,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803392408] [2021-08-21 18:54:15,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:54:15,974 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:15,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:15,975 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:54:15,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-21 18:54:22,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-08-21 18:54:22,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:22,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 72 conjunts are in the unsatisfiable core [2021-08-21 18:54:22,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:24,657 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 11 treesize of output 7 [2021-08-21 18:54:24,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1112 backedges. 0 proven. 1112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:54:24,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803392408] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:24,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:24,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 70 [2021-08-21 18:54:24,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960260394] [2021-08-21 18:54:24,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-08-21 18:54:24,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:24,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-08-21 18:54:24,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=4797, Unknown=0, NotChecked=0, Total=4970 [2021-08-21 18:54:24,722 INFO L87 Difference]: Start difference. First operand 171 states and 173 transitions. Second operand has 71 states, 71 states have (on average 4.422535211267606) internal successors, (314), 70 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:27,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:27,275 INFO L93 Difference]: Finished difference Result 259 states and 262 transitions. [2021-08-21 18:54:27,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 18:54:27,275 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 4.422535211267606) internal successors, (314), 70 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-08-21 18:54:27,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:27,276 INFO L225 Difference]: With dead ends: 259 [2021-08-21 18:54:27,276 INFO L226 Difference]: Without dead ends: 259 [2021-08-21 18:54:27,277 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1523 ImplicationChecksByTransitivity, 3792.2ms TimeCoverageRelationStatistics Valid=1150, Invalid=10406, Unknown=0, NotChecked=0, Total=11556 [2021-08-21 18:54:27,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-08-21 18:54:27,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 162. [2021-08-21 18:54:27,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.0124223602484472) internal successors, (163), 161 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:27,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 163 transitions. [2021-08-21 18:54:27,280 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 163 transitions. Word has length 160 [2021-08-21 18:54:27,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:27,280 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 163 transitions. [2021-08-21 18:54:27,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 4.422535211267606) internal successors, (314), 70 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:27,280 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 163 transitions. [2021-08-21 18:54:27,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-08-21 18:54:27,281 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:27,281 INFO L512 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:27,320 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-08-21 18:54:27,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:27,489 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:54:27,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:27,489 INFO L82 PathProgramCache]: Analyzing trace with hash 114836373, now seen corresponding path program 46 times [2021-08-21 18:54:27,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:27,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008834492] [2021-08-21 18:54:27,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:27,490 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:27,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:27,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1132 backedges. 697 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:54:27,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:27,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008834492] [2021-08-21 18:54:27,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008834492] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:27,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852804350] [2021-08-21 18:54:27,768 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:54:27,768 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:27,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:27,770 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:54:27,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-21 18:54:34,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:54:34,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:34,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 18:54:34,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:35,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1132 backedges. 697 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:54:35,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852804350] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:35,333 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:35,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 19 [2021-08-21 18:54:35,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380804159] [2021-08-21 18:54:35,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 18:54:35,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:35,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 18:54:35,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:54:35,334 INFO L87 Difference]: Start difference. First operand 162 states and 163 transitions. Second operand has 20 states, 20 states have (on average 8.35) internal successors, (167), 19 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:35,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:35,381 INFO L93 Difference]: Finished difference Result 259 states and 261 transitions. [2021-08-21 18:54:35,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 18:54:35,382 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 8.35) internal successors, (167), 19 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 161 [2021-08-21 18:54:35,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:35,382 INFO L225 Difference]: With dead ends: 259 [2021-08-21 18:54:35,382 INFO L226 Difference]: Without dead ends: 172 [2021-08-21 18:54:35,383 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 157.1ms TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:54:35,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-08-21 18:54:35,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 166. [2021-08-21 18:54:35,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.0121212121212122) internal successors, (167), 165 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:35,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 167 transitions. [2021-08-21 18:54:35,385 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 167 transitions. Word has length 161 [2021-08-21 18:54:35,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:35,385 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 167 transitions. [2021-08-21 18:54:35,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 8.35) internal successors, (167), 19 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:35,386 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 167 transitions. [2021-08-21 18:54:35,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-08-21 18:54:35,386 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:35,386 INFO L512 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:35,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-08-21 18:54:35,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-08-21 18:54:35,605 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:54:35,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:35,605 INFO L82 PathProgramCache]: Analyzing trace with hash 844273361, now seen corresponding path program 47 times [2021-08-21 18:54:35,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:35,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247454338] [2021-08-21 18:54:35,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:35,605 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:35,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:54,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1193 backedges. 0 proven. 1193 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:54:54,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:54,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247454338] [2021-08-21 18:54:54,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247454338] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:54,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012642220] [2021-08-21 18:54:54,653 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:54:54,653 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:54,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:54,653 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:54:54,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-21 18:55:01,753 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-08-21 18:55:01,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:01,756 WARN L261 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 270 conjunts are in the unsatisfiable core [2021-08-21 18:55:01,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:40,204 INFO L354 Elim1Store]: treesize reduction 1410, result has 0.1 percent of original size [2021-08-21 18:55:40,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 194 treesize of output 70 [2021-08-21 18:55:42,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1193 backedges. 0 proven. 1193 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:55:42,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012642220] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:42,281 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:42,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [123, 107] total 229 [2021-08-21 18:55:42,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320358826] [2021-08-21 18:55:42,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 230 states [2021-08-21 18:55:42,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:42,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 230 interpolants. [2021-08-21 18:55:42,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=588, Invalid=52082, Unknown=0, NotChecked=0, Total=52670 [2021-08-21 18:55:42,285 INFO L87 Difference]: Start difference. First operand 166 states and 167 transitions. Second operand has 230 states, 230 states have (on average 1.4304347826086956) internal successors, (329), 229 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:16,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:16,792 INFO L93 Difference]: Finished difference Result 269 states and 271 transitions. [2021-08-21 18:56:16,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-08-21 18:56:16,793 INFO L78 Accepts]: Start accepts. Automaton has has 230 states, 230 states have (on average 1.4304347826086956) internal successors, (329), 229 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-08-21 18:56:16,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:16,793 INFO L225 Difference]: With dead ends: 269 [2021-08-21 18:56:16,793 INFO L226 Difference]: Without dead ends: 265 [2021-08-21 18:56:16,796 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 285 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13785 ImplicationChecksByTransitivity, 62537.5ms TimeCoverageRelationStatistics Valid=920, Invalid=81162, Unknown=0, NotChecked=0, Total=82082 [2021-08-21 18:56:16,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-08-21 18:56:16,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 180. [2021-08-21 18:56:16,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.0167597765363128) internal successors, (182), 179 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:16,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 182 transitions. [2021-08-21 18:56:16,799 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 182 transitions. Word has length 165 [2021-08-21 18:56:16,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:16,799 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 182 transitions. [2021-08-21 18:56:16,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 230 states, 230 states have (on average 1.4304347826086956) internal successors, (329), 229 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:16,799 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 182 transitions. [2021-08-21 18:56:16,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-08-21 18:56:16,800 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:16,800 INFO L512 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:16,843 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-08-21 18:56:17,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-21 18:56:17,023 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:56:17,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:17,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1514607603, now seen corresponding path program 48 times [2021-08-21 18:56:17,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:17,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158270154] [2021-08-21 18:56:17,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:17,024 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:17,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:17,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1258 backedges. 0 proven. 1258 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:56:17,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:17,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158270154] [2021-08-21 18:56:17,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158270154] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:17,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774485088] [2021-08-21 18:56:17,992 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:56:17,993 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:17,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:17,993 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:56:17,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-21 18:56:26,121 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-08-21 18:56:26,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:26,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 72 conjunts are in the unsatisfiable core [2021-08-21 18:56:26,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:27,904 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 11 treesize of output 7 [2021-08-21 18:56:27,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1258 backedges. 0 proven. 1258 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:56:27,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774485088] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:27,971 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:27,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 73 [2021-08-21 18:56:27,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572490559] [2021-08-21 18:56:27,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-08-21 18:56:27,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:27,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-08-21 18:56:27,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=5222, Unknown=0, NotChecked=0, Total=5402 [2021-08-21 18:56:27,972 INFO L87 Difference]: Start difference. First operand 180 states and 182 transitions. Second operand has 74 states, 74 states have (on average 4.486486486486487) internal successors, (332), 73 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:30,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:30,664 INFO L93 Difference]: Finished difference Result 268 states and 270 transitions. [2021-08-21 18:56:30,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 18:56:30,664 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 4.486486486486487) internal successors, (332), 73 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 169 [2021-08-21 18:56:30,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:30,665 INFO L225 Difference]: With dead ends: 268 [2021-08-21 18:56:30,665 INFO L226 Difference]: Without dead ends: 268 [2021-08-21 18:56:30,666 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1631 ImplicationChecksByTransitivity, 4099.4ms TimeCoverageRelationStatistics Valid=1219, Invalid=11213, Unknown=0, NotChecked=0, Total=12432 [2021-08-21 18:56:30,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-08-21 18:56:30,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 171. [2021-08-21 18:56:30,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.011764705882353) internal successors, (172), 170 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:30,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 172 transitions. [2021-08-21 18:56:30,669 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 172 transitions. Word has length 169 [2021-08-21 18:56:30,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:30,669 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 172 transitions. [2021-08-21 18:56:30,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 4.486486486486487) internal successors, (332), 73 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:30,669 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 172 transitions. [2021-08-21 18:56:30,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-08-21 18:56:30,670 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:30,670 INFO L512 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:30,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-08-21 18:56:30,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:30,877 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:56:30,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:30,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1688011969, now seen corresponding path program 49 times [2021-08-21 18:56:30,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:30,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718753124] [2021-08-21 18:56:30,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:30,877 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:30,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:31,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1279 backedges. 783 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:56:31,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:31,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718753124] [2021-08-21 18:56:31,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718753124] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:31,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622596658] [2021-08-21 18:56:31,222 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:56:31,223 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:31,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:31,224 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:56:31,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-21 18:56:39,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:39,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-21 18:56:39,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:39,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1279 backedges. 783 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:56:39,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622596658] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:39,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:39,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 20 [2021-08-21 18:56:39,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642953873] [2021-08-21 18:56:39,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 18:56:39,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:39,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 18:56:39,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:56:39,827 INFO L87 Difference]: Start difference. First operand 171 states and 172 transitions. Second operand has 21 states, 21 states have (on average 8.380952380952381) internal successors, (176), 20 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:39,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:39,884 INFO L93 Difference]: Finished difference Result 273 states and 275 transitions. [2021-08-21 18:56:39,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:56:39,885 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 8.380952380952381) internal successors, (176), 20 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-08-21 18:56:39,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:39,885 INFO L225 Difference]: With dead ends: 273 [2021-08-21 18:56:39,885 INFO L226 Difference]: Without dead ends: 181 [2021-08-21 18:56:39,886 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 150.8ms TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:56:39,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-08-21 18:56:39,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 175. [2021-08-21 18:56:39,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.0114942528735633) internal successors, (176), 174 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:39,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 176 transitions. [2021-08-21 18:56:39,888 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 176 transitions. Word has length 170 [2021-08-21 18:56:39,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:39,888 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 176 transitions. [2021-08-21 18:56:39,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 8.380952380952381) internal successors, (176), 20 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:39,888 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 176 transitions. [2021-08-21 18:56:39,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-08-21 18:56:39,889 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:39,889 INFO L512 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:39,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-08-21 18:56:40,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-08-21 18:56:40,097 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:56:40,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:40,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1824090875, now seen corresponding path program 50 times [2021-08-21 18:56:40,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:40,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492977829] [2021-08-21 18:56:40,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:40,097 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:40,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2021-08-21 18:56:42,434 WARN L223 SmtUtils]: Removed 1 from assertion stack [2021-08-21 18:56:42,435 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-21 18:56:42,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-08-21 18:56:42,436 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 175 with TraceHistMax 18,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 3ms.. [2021-08-21 18:56:42,437 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 18:56:42,437 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 18:56:42,440 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 18:56:42,440 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 18:56:42,441 INFO L202 PluginConnector]: Adding new model queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 06:56:42 BasicIcfg [2021-08-21 18:56:42,441 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 18:56:42,442 INFO L168 Benchmark]: Toolchain (without parser) took 730999.58 ms. Allocated memory was 194.0 MB in the beginning and 1.1 GB in the end (delta: 908.1 MB). Free memory was 174.7 MB in the beginning and 315.8 MB in the end (delta: -141.1 MB). Peak memory consumption was 768.1 MB. Max. memory is 8.0 GB. [2021-08-21 18:56:42,442 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.57 ms. Allocated memory is still 194.0 MB. Free memory is still 175.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 18:56:42,443 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.56 ms. Allocated memory is still 194.0 MB. Free memory was 174.7 MB in the beginning and 173.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 18:56:42,443 INFO L168 Benchmark]: Boogie Preprocessor took 21.33 ms. Allocated memory is still 194.0 MB. Free memory was 173.1 MB in the beginning and 172.2 MB in the end (delta: 840.1 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 18:56:42,443 INFO L168 Benchmark]: RCFGBuilder took 293.30 ms. Allocated memory is still 194.0 MB. Free memory was 172.2 MB in the beginning and 158.5 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-08-21 18:56:42,443 INFO L168 Benchmark]: TraceAbstraction took 730651.89 ms. Allocated memory was 194.0 MB in the beginning and 1.1 GB in the end (delta: 908.1 MB). Free memory was 158.0 MB in the beginning and 315.8 MB in the end (delta: -157.8 MB). Peak memory consumption was 751.4 MB. Max. memory is 8.0 GB. [2021-08-21 18:56:42,444 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 0.57 ms. Allocated memory is still 194.0 MB. Free memory is still 175.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 27.56 ms. Allocated memory is still 194.0 MB. Free memory was 174.7 MB in the beginning and 173.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 21.33 ms. Allocated memory is still 194.0 MB. Free memory was 173.1 MB in the beginning and 172.2 MB in the end (delta: 840.1 kB). There was no memory consumed. Max. memory is 8.0 GB. * RCFGBuilder took 293.30 ms. Allocated memory is still 194.0 MB. Free memory was 172.2 MB in the beginning and 158.5 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 730651.89 ms. Allocated memory was 194.0 MB in the beginning and 1.1 GB in the end (delta: 908.1 MB). Free memory was 158.0 MB in the beginning and 315.8 MB in the end (delta: -157.8 MB). Peak memory consumption was 751.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 110, positive: 99, positive conditional: 99, positive unconditional: 0, negative: 11, negative conditional: 11, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 99, positive: 99, positive conditional: 0, positive unconditional: 99, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 99, positive: 99, positive conditional: 0, positive unconditional: 99, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 99, positive: 97, positive conditional: 0, positive unconditional: 97, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 2, positive: 2, positive conditional: 0, positive unconditional: 2, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 22, positive: 22, positive conditional: 0, positive unconditional: 22, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 99, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 99, unknown conditional: 0, unknown unconditional: 99] , Statistics on independence cache: Total cache size (in pairs): 99, Positive cache size: 99, Positive conditional cache size: 0, Positive unconditional cache size: 99, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Independence queries for same thread: 11 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 175 with TraceHistMax 18,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 3ms.. - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 175 with TraceHistMax 18,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 3ms.. - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 175 with TraceHistMax 18,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 3ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 48 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 730520.7ms, OverallIterations: 53, TraceHistogramMax: 18, EmptinessCheckTime: 52.4ms, AutomataDifference: 211597.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 119.5ms, PartialOrderReductionTime: 101.9ms, HoareTripleCheckerStatistics: 2087 SDtfs, 8703 SDslu, 41716 SDs, 0 SdLazy, 180302 SolverSat, 3182 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 87254.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7551 GetRequests, 3731 SyntacticMatches, 19 SemanticMatches, 3801 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94029 ImplicationChecksByTransitivity, 373673.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=180occurred in iteration=50, InterpolantAutomatonStates: 1731, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 166.4ms AutomataMinimizationTime, 52 MinimizatonAttempts, 1874 StatesRemovedByMinimization, 51 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 441.5ms SsaConstructionTime, 2215.0ms SatisfiabilityAnalysisTime, 373010.6ms InterpolantComputationTime, 9782 NumberOfCodeBlocks, 9782 NumberOfCodeBlocksAsserted, 342 NumberOfCheckSat, 9680 ConstructedInterpolants, 4 QuantifiedInterpolants, 251079 SizeOfPredicates, 318 NumberOfNonLiveVariables, 10939 ConjunctsInSsa, 3492 ConjunctsInUnsatCore, 102 InterpolantComputations, 2 PerfectInterpolantSequences, 10023/45213 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown